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apache / storm / 44b80fbfcf8a52b6e7cb3840a52ff07f8a2364e4 / . / storm-core / src / clj / org / apache / storm / daemon / nimbus.clj
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;; Licensed to the Apache Software Foundation (ASF) under one
;; or more contributor license agreements. See the NOTICE file
;; distributed with this work for additional information
;; regarding copyright ownership. The ASF licenses this file
;; to you under the Apache License, Version 2.0 (the
;; "License"); you may not use this file except in compliance
;; with the License. You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
(ns org.apache.storm.daemon.nimbus
(:import [org.apache.thrift.server THsHaServer THsHaServer$Args])
(:import [org.apache.storm.generated KeyNotFoundException])
(:import [org.apache.storm.security INimbusCredentialPlugin])
(:import [org.apache.storm.blobstore LocalFsBlobStore])
(:import [org.apache.thrift.protocol TBinaryProtocol TBinaryProtocol$Factory])
(:import [org.apache.thrift.exception])
(:import [org.apache.thrift.transport TNonblockingServerTransport TNonblockingServerSocket])
(:import [org.apache.commons.io FileUtils])
(:import [javax.security.auth Subject])
(:import [org.apache.storm.security.auth NimbusPrincipal])
(:import [java.nio ByteBuffer]
[java.util Collections List HashMap]
[org.apache.storm.generated NimbusSummary])
(:import [java.nio ByteBuffer]
[java.util Collections List HashMap ArrayList Iterator])
(:import [org.apache.storm.blobstore AtomicOutputStream BlobStoreAclHandler
InputStreamWithMeta KeyFilter KeySequenceNumber BlobSynchronizer])
(:import [java.io File FileOutputStream FileInputStream])
(:import [java.net InetAddress ServerSocket BindException])
(:import [java.nio.channels Channels WritableByteChannel])
(:import [org.apache.storm.security.auth ThriftServer ThriftConnectionType ReqContext AuthUtils])
(:use [org.apache.storm.scheduler.DefaultScheduler])
(:import [org.apache.storm.scheduler INimbus SupervisorDetails WorkerSlot TopologyDetails
Cluster Topologies SchedulerAssignment SchedulerAssignmentImpl DefaultScheduler ExecutorDetails])
(:import [org.apache.storm.nimbus NimbusInfo])
(:import [org.apache.storm.utils TimeCacheMap TimeCacheMap$ExpiredCallback Utils TupleUtils ThriftTopologyUtils
BufferFileInputStream BufferInputStream])
(:import [org.apache.storm.generated NotAliveException AlreadyAliveException StormTopology ErrorInfo
ExecutorInfo InvalidTopologyException Nimbus$Iface Nimbus$Processor SubmitOptions TopologyInitialStatus
KillOptions RebalanceOptions ClusterSummary SupervisorSummary TopologySummary TopologyInfo TopologyHistoryInfo
ExecutorSummary AuthorizationException GetInfoOptions NumErrorsChoice SettableBlobMeta ReadableBlobMeta
BeginDownloadResult ListBlobsResult ComponentPageInfo TopologyPageInfo LogConfig LogLevel LogLevelAction
ProfileRequest ProfileAction NodeInfo])
(:import [org.apache.storm.daemon Shutdownable])
(:import [org.apache.storm.cluster ClusterStateContext DaemonType])
(:use [org.apache.storm util config log timer zookeeper local-state])
(:require [org.apache.storm [cluster :as cluster]
[converter :as converter]
[stats :as stats]])
(:require [clojure.set :as set])
(:import [org.apache.storm.daemon.common StormBase Assignment])
(:use [org.apache.storm.daemon common])
(:use [org.apache.storm config])
(:import [org.apache.zookeeper data.ACL ZooDefs$Ids ZooDefs$Perms])
(:import [org.apache.storm.utils VersionInfo])
(:require [clj-time.core :as time])
(:require [clj-time.coerce :as coerce])
(:require [metrics.meters :refer [defmeter mark!]])
(:require [metrics.gauges :refer [defgauge]])
(:gen-class
:methods [^{:static true} [launch [org.apache.storm.scheduler.INimbus] void]]))
(defmeter nimbus:num-submitTopologyWithOpts-calls)
(defmeter nimbus:num-submitTopology-calls)
(defmeter nimbus:num-killTopologyWithOpts-calls)
(defmeter nimbus:num-killTopology-calls)
(defmeter nimbus:num-rebalance-calls)
(defmeter nimbus:num-activate-calls)
(defmeter nimbus:num-deactivate-calls)
(defmeter nimbus:num-debug-calls)
(defmeter nimbus:num-setWorkerProfiler-calls)
(defmeter nimbus:num-getComponentPendingProfileActions-calls)
(defmeter nimbus:num-setLogConfig-calls)
(defmeter nimbus:num-uploadNewCredentials-calls)
(defmeter nimbus:num-beginFileUpload-calls)
(defmeter nimbus:num-uploadChunk-calls)
(defmeter nimbus:num-finishFileUpload-calls)
(defmeter nimbus:num-beginFileDownload-calls)
(defmeter nimbus:num-downloadChunk-calls)
(defmeter nimbus:num-getNimbusConf-calls)
(defmeter nimbus:num-getLogConfig-calls)
(defmeter nimbus:num-getTopologyConf-calls)
(defmeter nimbus:num-getTopology-calls)
(defmeter nimbus:num-getUserTopology-calls)
(defmeter nimbus:num-getClusterInfo-calls)
(defmeter nimbus:num-getTopologyInfoWithOpts-calls)
(defmeter nimbus:num-getTopologyInfo-calls)
(defmeter nimbus:num-getTopologyPageInfo-calls)
(defmeter nimbus:num-getComponentPageInfo-calls)
(defmeter nimbus:num-shutdown-calls)
(def STORM-VERSION (VersionInfo/getVersion))
(defn file-cache-map [conf]
(TimeCacheMap.
(int (conf NIMBUS-FILE-COPY-EXPIRATION-SECS))
(reify TimeCacheMap$ExpiredCallback
(expire [this id stream]
(.close stream)
))
))
(defn mk-scheduler [conf inimbus]
(let [forced-scheduler (.getForcedScheduler inimbus)
scheduler (cond
forced-scheduler
(do (log-message "Using forced scheduler from INimbus " (class forced-scheduler))
forced-scheduler)
(conf STORM-SCHEDULER)
(do (log-message "Using custom scheduler: " (conf STORM-SCHEDULER))
(-> (conf STORM-SCHEDULER) new-instance))
:else
(do (log-message "Using default scheduler")
(DefaultScheduler.)))]
(.prepare scheduler conf)
scheduler
))
(defmulti blob-sync cluster-mode)
(defnk is-leader [nimbus :throw-exception true]
(let [leader-elector (:leader-elector nimbus)]
(if (.isLeader leader-elector) true
(if throw-exception
(let [leader-address (.getLeader leader-elector)]
(throw (RuntimeException. (str "not a leader, current leader is " leader-address))))))))
(def NIMBUS-ZK-ACLS
[(first ZooDefs$Ids/CREATOR_ALL_ACL)
(ACL. (bit-or ZooDefs$Perms/READ ZooDefs$Perms/CREATE) ZooDefs$Ids/ANYONE_ID_UNSAFE)])
(defn mk-blob-cache-map
"Constructs a TimeCacheMap instance with a blob store timeout whose
expiration callback invokes cancel on the value held by an expired entry when
that value is an AtomicOutputStream and calls close otherwise."
[conf]
(TimeCacheMap.
(int (conf NIMBUS-BLOBSTORE-EXPIRATION-SECS))
(reify TimeCacheMap$ExpiredCallback
(expire [this id stream]
(if (instance? AtomicOutputStream stream)
(.cancel stream)
(.close stream))))))
(defn mk-bloblist-cache-map
"Constructs a TimeCacheMap instance with a blobstore timeout and no callback
function."
[conf]
(TimeCacheMap. (int (conf NIMBUS-BLOBSTORE-EXPIRATION-SECS))))
(defn create-tology-action-notifier [conf]
(when-not (clojure.string/blank? (conf NIMBUS-TOPOLOGY-ACTION-NOTIFIER-PLUGIN))
(let [instance (new-instance (conf NIMBUS-TOPOLOGY-ACTION-NOTIFIER-PLUGIN))]
(try
(.prepare instance conf)
instance
(catch Exception e
(log-warn-error e "Ingoring exception, Could not initialize " (conf NIMBUS-TOPOLOGY-ACTION-NOTIFIER-PLUGIN)))))))
(defn nimbus-data [conf inimbus]
(let [forced-scheduler (.getForcedScheduler inimbus)
blob-store (Utils/getNimbusBlobStore conf (NimbusInfo/fromConf conf))]
{:conf conf
:nimbus-host-port-info (NimbusInfo/fromConf conf)
:inimbus inimbus
:authorization-handler (mk-authorization-handler (conf NIMBUS-AUTHORIZER) conf)
:impersonation-authorization-handler (mk-authorization-handler (conf NIMBUS-IMPERSONATION-AUTHORIZER) conf)
:submitted-count (atom 0)
:storm-cluster-state (cluster/mk-storm-cluster-state conf :acls (when
(Utils/isZkAuthenticationConfiguredStormServer
conf)
NIMBUS-ZK-ACLS)
:context (ClusterStateContext. DaemonType/NIMBUS))
:submit-lock (Object.)
:cred-update-lock (Object.)
:log-update-lock (Object.)
:heartbeats-cache (atom {})
:downloaders (file-cache-map conf)
:uploaders (file-cache-map conf)
:blob-store blob-store
:blob-downloaders (mk-blob-cache-map conf)
:blob-uploaders (mk-blob-cache-map conf)
:blob-listers (mk-bloblist-cache-map conf)
:uptime (uptime-computer)
:validator (new-instance (conf NIMBUS-TOPOLOGY-VALIDATOR))
:timer (mk-timer :kill-fn (fn [t]
(log-error t "Error when processing event")
(exit-process! 20 "Error when processing an event")
))
:scheduler (mk-scheduler conf inimbus)
:leader-elector (zk-leader-elector conf blob-store)
:id->sched-status (atom {})
:node-id->resources (atom {}) ;;resources of supervisors
:id->resources (atom {}) ;;resources of topologies
:cred-renewers (AuthUtils/GetCredentialRenewers conf)
:topology-history-lock (Object.)
:topo-history-state (nimbus-topo-history-state conf)
:nimbus-autocred-plugins (AuthUtils/getNimbusAutoCredPlugins conf)
:nimbus-topology-action-notifier (create-tology-action-notifier conf)
}))
(defn inbox [nimbus]
(master-inbox (:conf nimbus)))
(defn- get-subject
[]
(let [req (ReqContext/context)]
(.subject req)))
(defn- read-storm-conf [conf storm-id blob-store]
(clojurify-structure
(Utils/fromCompressedJsonConf
(.readBlob blob-store (master-stormconf-key storm-id) (get-subject)))))
(declare delay-event)
(declare mk-assignments)
(defn get-nimbus-subject
[]
(let [subject (Subject.)
principal (NimbusPrincipal.)
principals (.getPrincipals subject)]
(.add principals principal)
subject))
(def nimbus-subject
(get-nimbus-subject))
(defn- get-key-list-from-id
[conf id]
(log-debug "set keys id = " id "set = " #{(master-stormcode-key id) (master-stormjar-key id) (master-stormconf-key id)})
(if (local-mode? conf)
[(master-stormcode-key id) (master-stormconf-key id)]
[(master-stormcode-key id) (master-stormjar-key id) (master-stormconf-key id)]))
(defn kill-transition [nimbus storm-id]
(fn [kill-time]
(let [delay (if kill-time
kill-time
(get (read-storm-conf (:conf nimbus) storm-id (:blob-store nimbus))
TOPOLOGY-MESSAGE-TIMEOUT-SECS))]
(delay-event nimbus
storm-id
delay
:remove)
{
:status {:type :killed}
:topology-action-options {:delay-secs delay :action :kill}})
))
(defn rebalance-transition [nimbus storm-id status]
(fn [time num-workers executor-overrides]
(let [delay (if time
time
(get (read-storm-conf (:conf nimbus) storm-id (:blob-store nimbus))
TOPOLOGY-MESSAGE-TIMEOUT-SECS))]
(delay-event nimbus
storm-id
delay
:do-rebalance)
{:status {:type :rebalancing}
:prev-status status
:topology-action-options (-> {:delay-secs delay :action :rebalance}
(assoc-non-nil :num-workers num-workers)
(assoc-non-nil :component->executors executor-overrides))
})))
(defn do-rebalance [nimbus storm-id status storm-base]
(let [rebalance-options (:topology-action-options storm-base)]
(.update-storm! (:storm-cluster-state nimbus)
storm-id
(-> {}
(assoc-non-nil :component->executors (:component->executors rebalance-options))
(assoc-non-nil :num-workers (:num-workers rebalance-options)))))
(mk-assignments nimbus :scratch-topology-id storm-id))
(defn state-transitions [nimbus storm-id status storm-base]
{:active {:inactivate :inactive
:activate nil
:rebalance (rebalance-transition nimbus storm-id status)
:kill (kill-transition nimbus storm-id)
}
:inactive {:activate :active
:inactivate nil
:rebalance (rebalance-transition nimbus storm-id status)
:kill (kill-transition nimbus storm-id)
}
:killed {:startup (fn [] (delay-event nimbus
storm-id
(-> storm-base
:topology-action-options
:delay-secs)
:remove)
nil)
:kill (kill-transition nimbus storm-id)
:remove (fn []
(log-message "Killing topology: " storm-id)
(.remove-storm! (:storm-cluster-state nimbus)
storm-id)
(when (instance? LocalFsBlobStore (:blob-store nimbus))
(doseq [blob-key (get-key-list-from-id (:conf nimbus) storm-id)]
(.remove-blobstore-key! (:storm-cluster-state nimbus) blob-key)
(.remove-key-version! (:storm-cluster-state nimbus) blob-key)))
nil)
}
:rebalancing {:startup (fn [] (delay-event nimbus
storm-id
(-> storm-base
:topology-action-options
:delay-secs)
:do-rebalance)
nil)
:kill (kill-transition nimbus storm-id)
:do-rebalance (fn []
(do-rebalance nimbus storm-id status storm-base)
{:status {:type (:type (:prev-status storm-base))}
:prev-status :rebalancing
:topology-action-options nil})
}})
(defn transition!
([nimbus storm-id event]
(transition! nimbus storm-id event false))
([nimbus storm-id event error-on-no-transition?]
(is-leader nimbus)
(locking (:submit-lock nimbus)
(let [system-events #{:startup}
[event & event-args] (if (keyword? event) [event] event)
storm-base (-> nimbus :storm-cluster-state (.storm-base storm-id nil))
status (:status storm-base)]
;; handles the case where event was scheduled but topology has been removed
(if-not status
(log-message "Cannot apply event " event " to " storm-id " because topology no longer exists")
(let [get-event (fn [m e]
(if (contains? m e)
(m e)
(let [msg (str "No transition for event: " event
", status: " status,
" storm-id: " storm-id)]
(if error-on-no-transition?
(throw-runtime msg)
(do (when-not (contains? system-events event)
(log-message msg))
nil))
)))
transition (-> (state-transitions nimbus storm-id status storm-base)
(get (:type status))
(get-event event))
transition (if (or (nil? transition)
(keyword? transition))
(fn [] transition)
transition)
storm-base-updates (apply transition event-args)
storm-base-updates (if (keyword? storm-base-updates) ;if it's just a symbol, that just indicates new status.
{:status {:type storm-base-updates}}
storm-base-updates)]
(when storm-base-updates
(.update-storm! (:storm-cluster-state nimbus) storm-id storm-base-updates)))))
)))
(defn transition-name! [nimbus storm-name event & args]
(let [storm-id (get-storm-id (:storm-cluster-state nimbus) storm-name)]
(when-not storm-id
(throw (NotAliveException. storm-name)))
(apply transition! nimbus storm-id event args)))
(defn delay-event [nimbus storm-id delay-secs event]
(log-message "Delaying event " event " for " delay-secs " secs for " storm-id)
(schedule (:timer nimbus)
(or delay-secs 0)
#(try (transition! nimbus storm-id event false)
(catch Exception e (log-error e "Exception while trying transition for " storm-id " and event " event)))))
;; active -> reassign in X secs
;; killed -> wait kill time then shutdown
;; active -> reassign in X secs
;; inactive -> nothing
;; rebalance -> wait X seconds then rebalance
;; swap... (need to handle kill during swap, etc.)
;; event transitions are delayed by timer... anything else that comes through (e.g. a kill) override the transition? or just disable other transitions during the transition?
(defmulti setup-jar cluster-mode)
(defmulti clean-inbox cluster-mode)
;; swapping design
;; -- need 2 ports per worker (swap port and regular port)
;; -- topology that swaps in can use all the existing topologies swap ports, + unused worker slots
;; -- how to define worker resources? port range + number of workers?
;; Monitoring (or by checking when nodes go down or heartbeats aren't received):
;; 1. read assignment
;; 2. see which executors/nodes are up
;; 3. make new assignment to fix any problems
;; 4. if a storm exists but is not taken down fully, ensure that storm takedown is launched (step by step remove executors and finally remove assignments)
(defn- assigned-slots
"Returns a map from node-id to a set of ports"
[storm-cluster-state]
(let [assignments (.assignments storm-cluster-state nil)]
(defaulted
(apply merge-with set/union
(for [a assignments
[_ [node port]] (-> (.assignment-info storm-cluster-state a nil) :executor->node+port)]
{node #{port}}
))
{})
))
(defn- all-supervisor-info
([storm-cluster-state] (all-supervisor-info storm-cluster-state nil))
([storm-cluster-state callback]
(let [supervisor-ids (.supervisors storm-cluster-state callback)]
(into {}
(mapcat
(fn [id]
(if-let [info (.supervisor-info storm-cluster-state id)]
[[id info]]
))
supervisor-ids))
)))
(defn- all-scheduling-slots
[nimbus topologies missing-assignment-topologies]
(let [storm-cluster-state (:storm-cluster-state nimbus)
^INimbus inimbus (:inimbus nimbus)
supervisor-infos (all-supervisor-info storm-cluster-state nil)
supervisor-details (dofor [[id info] supervisor-infos]
(SupervisorDetails. id (:meta info) (:resources-map info)))
ret (.allSlotsAvailableForScheduling inimbus
supervisor-details
topologies
(set missing-assignment-topologies)
)
]
(dofor [^WorkerSlot slot ret]
[(.getNodeId slot) (.getPort slot)]
)))
(defn- get-version-for-key [key nimbus-host-port-info conf]
(let [version (KeySequenceNumber. key nimbus-host-port-info)]
(.getKeySequenceNumber version conf)))
(defn get-key-seq-from-blob-store [blob-store]
(let [key-iter (.listKeys blob-store)]
(iterator-seq key-iter)))
(defn- setup-storm-code [nimbus conf storm-id tmp-jar-location storm-conf topology]
(let [subject (get-subject)
storm-cluster-state (:storm-cluster-state nimbus)
blob-store (:blob-store nimbus)
jar-key (master-stormjar-key storm-id)
code-key (master-stormcode-key storm-id)
conf-key (master-stormconf-key storm-id)
nimbus-host-port-info (:nimbus-host-port-info nimbus)]
(when tmp-jar-location ;;in local mode there is no jar
(.createBlob blob-store jar-key (FileInputStream. tmp-jar-location) (SettableBlobMeta. BlobStoreAclHandler/DEFAULT) subject)
(if (instance? LocalFsBlobStore blob-store)
(.setup-blobstore! storm-cluster-state jar-key nimbus-host-port-info (get-version-for-key jar-key nimbus-host-port-info conf))))
(.createBlob blob-store conf-key (Utils/toCompressedJsonConf storm-conf) (SettableBlobMeta. BlobStoreAclHandler/DEFAULT) subject)
(if (instance? LocalFsBlobStore blob-store)
(.setup-blobstore! storm-cluster-state conf-key nimbus-host-port-info (get-version-for-key conf-key nimbus-host-port-info conf)))
(.createBlob blob-store code-key (Utils/serialize topology) (SettableBlobMeta. BlobStoreAclHandler/DEFAULT) subject)
(if (instance? LocalFsBlobStore blob-store)
(.setup-blobstore! storm-cluster-state code-key nimbus-host-port-info (get-version-for-key code-key nimbus-host-port-info conf)))))
(defn- read-storm-topology [storm-id blob-store]
(Utils/deserialize
(.readBlob blob-store (master-stormcode-key storm-id) (get-subject)) StormTopology))
(defn get-blob-replication-count
[blob-key nimbus]
(if (:blob-store nimbus)
(-> (:blob-store nimbus)
(.getBlobReplication blob-key nimbus-subject))))
(defn- wait-for-desired-code-replication [nimbus conf storm-id]
(let [min-replication-count (conf TOPOLOGY-MIN-REPLICATION-COUNT)
max-replication-wait-time (conf TOPOLOGY-MAX-REPLICATION-WAIT-TIME-SEC)
current-replication-count-jar (if (not (local-mode? conf))
(atom (get-blob-replication-count (master-stormjar-key storm-id) nimbus))
(atom min-replication-count))
current-replication-count-code (atom (get-blob-replication-count (master-stormcode-key storm-id) nimbus))
current-replication-count-conf (atom (get-blob-replication-count (master-stormconf-key storm-id) nimbus))
total-wait-time (atom 0)]
(if (:blob-store nimbus)
(while (and
(or (> min-replication-count @current-replication-count-jar)
(> min-replication-count @current-replication-count-code)
(> min-replication-count @current-replication-count-conf))
(or (neg? max-replication-wait-time)
(< @total-wait-time max-replication-wait-time)))
(sleep-secs 1)
(log-debug "waiting for desired replication to be achieved.
min-replication-count = " min-replication-count " max-replication-wait-time = " max-replication-wait-time
(if (not (local-mode? conf))"current-replication-count for jar key = " @current-replication-count-jar)
"current-replication-count for code key = " @current-replication-count-code
"current-replication-count for conf key = " @current-replication-count-conf
" total-wait-time " @total-wait-time)
(swap! total-wait-time inc)
(if (not (local-mode? conf))
(reset! current-replication-count-jar (get-blob-replication-count (master-stormjar-key storm-id) nimbus)))
(reset! current-replication-count-code (get-blob-replication-count (master-stormcode-key storm-id) nimbus))
(reset! current-replication-count-conf (get-blob-replication-count (master-stormconf-key storm-id) nimbus))))
(if (and (<= min-replication-count @current-replication-count-conf)
(<= min-replication-count @current-replication-count-code)
(<= min-replication-count @current-replication-count-jar))
(log-message "desired replication count " min-replication-count " achieved, "
"current-replication-count for conf key = " @current-replication-count-conf ", "
"current-replication-count for code key = " @current-replication-count-code ", "
"current-replication-count for jar key = " @current-replication-count-jar)
(log-message "desired replication count of " min-replication-count " not achieved but we have hit the max wait time "
max-replication-wait-time " so moving on with replication count for conf key = " @current-replication-count-conf
" for code key = " @current-replication-count-code "for jar key = " @current-replication-count-jar))))
(defn- read-storm-topology-as-nimbus [storm-id blob-store]
(Utils/deserialize
(.readBlob blob-store (master-stormcode-key storm-id) nimbus-subject) StormTopology))
(declare compute-executor->component)
(defn read-storm-conf-as-nimbus [storm-id blob-store]
(clojurify-structure
(Utils/fromCompressedJsonConf
(.readBlob blob-store (master-stormconf-key storm-id) nimbus-subject))))
(defn fixup-storm-base
[storm-base topo-conf]
(assoc storm-base
:owner (.get topo-conf TOPOLOGY-SUBMITTER-USER)
:principal (.get topo-conf TOPOLOGY-SUBMITTER-PRINCIPAL)))
(defn read-topology-details [nimbus storm-id]
(let [blob-store (:blob-store nimbus)
storm-base (or
(.storm-base (:storm-cluster-state nimbus) storm-id nil)
(throw (NotAliveException. storm-id)))
topology-conf (read-storm-conf-as-nimbus storm-id blob-store)
storm-base (if (nil? (:principal storm-base))
(let [new-sb (fixup-storm-base storm-base topology-conf)]
(.update-storm! (:storm-cluster-state nimbus) storm-id new-sb)
new-sb)
storm-base)
topology (read-storm-topology-as-nimbus storm-id blob-store)
executor->component (->> (compute-executor->component nimbus storm-id)
(map-key (fn [[start-task end-task]]
(ExecutorDetails. (int start-task) (int end-task)))))]
(TopologyDetails. storm-id
topology-conf
topology
(:num-workers storm-base)
executor->component
(:launch-time-secs storm-base)
(:owner storm-base))))
;; Does not assume that clocks are synchronized. Executor heartbeat is only used so that
;; nimbus knows when it's received a new heartbeat. All timing is done by nimbus and
;; tracked through heartbeat-cache
(defn- update-executor-cache [curr hb timeout]
(let [reported-time (:time-secs hb)
{last-nimbus-time :nimbus-time
last-reported-time :executor-reported-time} curr
reported-time (cond reported-time reported-time
last-reported-time last-reported-time
:else 0)
nimbus-time (if (or (not last-nimbus-time)
(not= last-reported-time reported-time))
(current-time-secs)
last-nimbus-time
)]
{:is-timed-out (and
nimbus-time
(>= (time-delta nimbus-time) timeout))
:nimbus-time nimbus-time
:executor-reported-time reported-time
:heartbeat hb}))
(defn update-heartbeat-cache [cache executor-beats all-executors timeout]
(let [cache (select-keys cache all-executors)]
(into {}
(for [executor all-executors :let [curr (cache executor)]]
[executor
(update-executor-cache curr (get executor-beats executor) timeout)]
))))
(defn update-heartbeats! [nimbus storm-id all-executors existing-assignment]
(log-debug "Updating heartbeats for " storm-id " " (pr-str all-executors))
(let [storm-cluster-state (:storm-cluster-state nimbus)
executor-beats (.executor-beats storm-cluster-state storm-id (:executor->node+port existing-assignment))
cache (update-heartbeat-cache (@(:heartbeats-cache nimbus) storm-id)
executor-beats
all-executors
((:conf nimbus) NIMBUS-TASK-TIMEOUT-SECS))]
(swap! (:heartbeats-cache nimbus) assoc storm-id cache)))
(defn- update-all-heartbeats! [nimbus existing-assignments topology->executors]
"update all the heartbeats for all the topologies's executors"
(doseq [[tid assignment] existing-assignments
:let [all-executors (topology->executors tid)]]
(update-heartbeats! nimbus tid all-executors assignment)))
(defn- alive-executors
[nimbus ^TopologyDetails topology-details all-executors existing-assignment]
(log-debug "Computing alive executors for " (.getId topology-details) "\n"
"Executors: " (pr-str all-executors) "\n"
"Assignment: " (pr-str existing-assignment) "\n"
"Heartbeat cache: " (pr-str (@(:heartbeats-cache nimbus) (.getId topology-details)))
)
;; TODO: need to consider all executors associated with a dead executor (in same slot) dead as well,
;; don't just rely on heartbeat being the same
(let [conf (:conf nimbus)
storm-id (.getId topology-details)
executor-start-times (:executor->start-time-secs existing-assignment)
heartbeats-cache (@(:heartbeats-cache nimbus) storm-id)]
(->> all-executors
(filter (fn [executor]
(let [start-time (get executor-start-times executor)
is-timed-out (-> heartbeats-cache (get executor) :is-timed-out)]
(if (and start-time
(or
(< (time-delta start-time)
(conf NIMBUS-TASK-LAUNCH-SECS))
(not is-timed-out)
))
true
(do
(log-message "Executor " storm-id ":" executor " not alive")
false))
)))
doall)))
(defn- to-executor-id [task-ids]
[(first task-ids) (last task-ids)])
(defn- compute-executors [nimbus storm-id]
(let [conf (:conf nimbus)
blob-store (:blob-store nimbus)
storm-base (.storm-base (:storm-cluster-state nimbus) storm-id nil)
component->executors (:component->executors storm-base)
storm-conf (read-storm-conf-as-nimbus storm-id blob-store)
topology (read-storm-topology-as-nimbus storm-id blob-store)
task->component (storm-task-info topology storm-conf)]
(if (nil? component->executors)
[]
(->> (storm-task-info topology storm-conf)
reverse-map
(map-val sort)
(join-maps component->executors)
(map-val (partial apply partition-fixed))
(mapcat second)
(map to-executor-id)
))))
(defn- compute-executor->component [nimbus storm-id]
(let [conf (:conf nimbus)
blob-store (:blob-store nimbus)
executors (compute-executors nimbus storm-id)
topology (read-storm-topology-as-nimbus storm-id blob-store)
storm-conf (read-storm-conf-as-nimbus storm-id blob-store)
task->component (storm-task-info topology storm-conf)
executor->component (into {} (for [executor executors
:let [start-task (first executor)
component (task->component start-task)]]
{executor component}))]
executor->component))
(defn- compute-topology->executors [nimbus storm-ids]
"compute a topology-id -> executors map"
(into {} (for [tid storm-ids]
{tid (set (compute-executors nimbus tid))})))
(defn- compute-topology->alive-executors [nimbus existing-assignments topologies topology->executors scratch-topology-id]
"compute a topology-id -> alive executors map"
(into {} (for [[tid assignment] existing-assignments
:let [topology-details (.getById topologies tid)
all-executors (topology->executors tid)
alive-executors (if (and scratch-topology-id (= scratch-topology-id tid))
all-executors
(set (alive-executors nimbus topology-details all-executors assignment)))]]
{tid alive-executors})))
(defn- compute-supervisor->dead-ports [nimbus existing-assignments topology->executors topology->alive-executors]
(let [dead-slots (into [] (for [[tid assignment] existing-assignments
:let [all-executors (topology->executors tid)
alive-executors (topology->alive-executors tid)
dead-executors (set/difference all-executors alive-executors)
dead-slots (->> (:executor->node+port assignment)
(filter #(contains? dead-executors (first %)))
vals)]]
dead-slots))
supervisor->dead-ports (->> dead-slots
(apply concat)
(map (fn [[sid port]] {sid #{port}}))
(apply (partial merge-with set/union)))]
(or supervisor->dead-ports {})))
(defn- compute-topology->scheduler-assignment [nimbus existing-assignments topology->alive-executors]
"convert assignment information in zk to SchedulerAssignment, so it can be used by scheduler api."
(into {} (for [[tid assignment] existing-assignments
:let [alive-executors (topology->alive-executors tid)
executor->node+port (:executor->node+port assignment)
worker->resources (:worker->resources assignment)
;; making a map from node+port to WorkerSlot with allocated resources
node+port->slot (into {} (for [[[node port] [mem-on-heap mem-off-heap cpu]] worker->resources]
{[node port]
(WorkerSlot. node port mem-on-heap mem-off-heap cpu)}))
executor->slot (into {} (for [[executor [node port]] executor->node+port]
;; filter out the dead executors
(if (contains? alive-executors executor)
{(ExecutorDetails. (first executor)
(second executor))
(get node+port->slot [node port])}
{})))]]
{tid (SchedulerAssignmentImpl. tid executor->slot)})))
(defn- read-all-supervisor-details [nimbus all-scheduling-slots supervisor->dead-ports]
"return a map: {supervisor-id SupervisorDetails}"
(let [storm-cluster-state (:storm-cluster-state nimbus)
supervisor-infos (all-supervisor-info storm-cluster-state)
nonexistent-supervisor-slots (apply dissoc all-scheduling-slots (keys supervisor-infos))
all-supervisor-details (into {} (for [[sid supervisor-info] supervisor-infos
:let [hostname (:hostname supervisor-info)
scheduler-meta (:scheduler-meta supervisor-info)
dead-ports (supervisor->dead-ports sid)
;; hide the dead-ports from the all-ports
;; these dead-ports can be reused in next round of assignments
all-ports (-> (get all-scheduling-slots sid)
(set/difference dead-ports)
((fn [ports] (map int ports))))
supervisor-details (SupervisorDetails. sid hostname scheduler-meta all-ports (:resources-map supervisor-info))
]]
{sid supervisor-details}))]
(merge all-supervisor-details
(into {}
(for [[sid ports] nonexistent-supervisor-slots]
[sid (SupervisorDetails. sid nil ports)]))
)))
(defn- compute-topology->executor->node+port [scheduler-assignments]
"convert {topology-id -> SchedulerAssignment} to
{topology-id -> {executor [node port]}}"
(map-val (fn [^SchedulerAssignment assignment]
(->> assignment
.getExecutorToSlot
(#(into {} (for [[^ExecutorDetails executor ^WorkerSlot slot] %]
{[(.getStartTask executor) (.getEndTask executor)]
[(.getNodeId slot) (.getPort slot)]})))))
scheduler-assignments))
;; NEW NOTES
;; only assign to supervisors who are there and haven't timed out
;; need to reassign workers with executors that have timed out (will this make it brittle?)
;; need to read in the topology and storm-conf from disk
;; if no slots available and no slots used by this storm, just skip and do nothing
;; otherwise, package rest of executors into available slots (up to how much it needs)
;; in the future could allocate executors intelligently (so that "close" tasks reside on same machine)
;; TODO: slots that have dead executor should be reused as long as supervisor is active
;; (defn- assigned-slots-from-scheduler-assignments [topology->assignment]
;; (->> topology->assignment
;; vals
;; (map (fn [^SchedulerAssignment a] (.getExecutorToSlot a)))
;; (mapcat vals)
;; (map (fn [^WorkerSlot s] {(.getNodeId s) #{(.getPort s)}}))
;; (apply merge-with set/union)
;; ))
(defn num-used-workers [^SchedulerAssignment scheduler-assignment]
(if scheduler-assignment
(count (.getSlots scheduler-assignment))
0 ))
(defn convert-assignments-to-worker->resources [new-scheduler-assignments]
"convert {topology-id -> SchedulerAssignment} to
{topology-id -> {[node port] [mem-on-heap mem-off-heap cpu]}}
Make sure this can deal with other non-RAS schedulers
later we may further support map-for-any-resources"
(map-val (fn [^SchedulerAssignment assignment]
(->> assignment
.getExecutorToSlot
.values
(#(into {} (for [^WorkerSlot slot %]
{[(.getNodeId slot) (.getPort slot)]
[(.getAllocatedMemOnHeap slot) (.getAllocatedMemOffHeap slot) (.getAllocatedCpu slot)]
})))))
new-scheduler-assignments))
(defn compute-new-topology->executor->node+port [new-scheduler-assignments existing-assignments]
(let [new-topology->executor->node+port (compute-topology->executor->node+port new-scheduler-assignments)]
;; print some useful information.
(doseq [[topology-id executor->node+port] new-topology->executor->node+port
:let [old-executor->node+port (-> topology-id
existing-assignments
:executor->node+port)
reassignment (filter (fn [[executor node+port]]
(and (contains? old-executor->node+port executor)
(not (= node+port (old-executor->node+port executor)))))
executor->node+port)]]
(when-not (empty? reassignment)
(let [new-slots-cnt (count (set (vals executor->node+port)))
reassign-executors (keys reassignment)]
(log-message "Reassigning " topology-id " to " new-slots-cnt " slots")
(log-message "Reassign executors: " (vec reassign-executors)))))
new-topology->executor->node+port))
;; public so it can be mocked out
(defn compute-new-scheduler-assignments [nimbus existing-assignments topologies scratch-topology-id]
(let [conf (:conf nimbus)
storm-cluster-state (:storm-cluster-state nimbus)
topology->executors (compute-topology->executors nimbus (keys existing-assignments))
;; update the executors heartbeats first.
_ (update-all-heartbeats! nimbus existing-assignments topology->executors)
topology->alive-executors (compute-topology->alive-executors nimbus
existing-assignments
topologies
topology->executors
scratch-topology-id)
supervisor->dead-ports (compute-supervisor->dead-ports nimbus
existing-assignments
topology->executors
topology->alive-executors)
topology->scheduler-assignment (compute-topology->scheduler-assignment nimbus
existing-assignments
topology->alive-executors)
missing-assignment-topologies (->> topologies
.getTopologies
(map (memfn getId))
(filter (fn [t]
(let [alle (get topology->executors t)
alivee (get topology->alive-executors t)]
(or (empty? alle)
(not= alle alivee)
(< (-> topology->scheduler-assignment
(get t)
num-used-workers )
(-> topologies (.getById t) .getNumWorkers)))))))
all-scheduling-slots (->> (all-scheduling-slots nimbus topologies missing-assignment-topologies)
(map (fn [[node-id port]] {node-id #{port}}))
(apply merge-with set/union))
supervisors (read-all-supervisor-details nimbus all-scheduling-slots supervisor->dead-ports)
cluster (Cluster. (:inimbus nimbus) supervisors topology->scheduler-assignment conf)
_ (.setStatusMap cluster (deref (:id->sched-status nimbus)))
;; call scheduler.schedule to schedule all the topologies
;; the new assignments for all the topologies are in the cluster object.
_ (.schedule (:scheduler nimbus) topologies cluster)
_ (.setTopologyResourcesMap cluster @(:id->resources nimbus))
_ (if-not (conf SCHEDULER-DISPLAY-RESOURCE) (.updateAssignedMemoryForTopologyAndSupervisor cluster topologies))
;;merge with existing statuses
_ (reset! (:id->sched-status nimbus) (merge (deref (:id->sched-status nimbus)) (.getStatusMap cluster)))
_ (reset! (:node-id->resources nimbus) (.getSupervisorsResourcesMap cluster))
_ (reset! (:id->resources nimbus) (.getTopologyResourcesMap cluster))]
(.getAssignments cluster)))
(defn changed-executors [executor->node+port new-executor->node+port]
(let [executor->node+port (if executor->node+port (sort executor->node+port) nil)
new-executor->node+port (if new-executor->node+port (sort new-executor->node+port) nil)
slot-assigned (reverse-map executor->node+port)
new-slot-assigned (reverse-map new-executor->node+port)
brand-new-slots (map-diff slot-assigned new-slot-assigned)]
(apply concat (vals brand-new-slots))
))
(defn newly-added-slots [existing-assignment new-assignment]
(let [old-slots (-> (:executor->node+port existing-assignment)
vals
set)
new-slots (-> (:executor->node+port new-assignment)
vals
set)]
(set/difference new-slots old-slots)))
(defn basic-supervisor-details-map [storm-cluster-state]
(let [infos (all-supervisor-info storm-cluster-state)]
(->> infos
(map (fn [[id info]]
[id (SupervisorDetails. id (:hostname info) (:scheduler-meta info) nil (:resources-map info))]))
(into {}))))
(defn- to-worker-slot [[node port]]
(WorkerSlot. node port))
(defn- fixup-assignment
[assignment td]
(assoc assignment
:owner (.getTopologySubmitter td)))
;; get existing assignment (just the executor->node+port map) -> default to {}
;; filter out ones which have a executor timeout
;; figure out available slots on cluster. add to that the used valid slots to get total slots. figure out how many executors should be in each slot (e.g., 4, 4, 4, 5)
;; only keep existing slots that satisfy one of those slots. for rest, reassign them across remaining slots
;; edge case for slots with no executor timeout but with supervisor timeout... just treat these as valid slots that can be reassigned to. worst comes to worse the executor will timeout and won't assign here next time around
(defnk mk-assignments [nimbus :scratch-topology-id nil]
(if (is-leader nimbus :throw-exception false)
(let [conf (:conf nimbus)
storm-cluster-state (:storm-cluster-state nimbus)
^INimbus inimbus (:inimbus nimbus)
;; read all the topologies
topology-ids (.active-storms storm-cluster-state)
tds (into {} (for [tid topology-ids]
{tid (read-topology-details nimbus tid)}))
topologies (Topologies. tds)
;; read all the assignments
assigned-topology-ids (.assignments storm-cluster-state nil)
existing-assignments (into {} (for [tid assigned-topology-ids]
;; for the topology which wants rebalance (specified by the scratch-topology-id)
;; we exclude its assignment, meaning that all the slots occupied by its assignment
;; will be treated as free slot in the scheduler code.
(when (or (nil? scratch-topology-id) (not= tid scratch-topology-id))
(let [assignment (.assignment-info storm-cluster-state tid nil)
td (.get tds tid)
assignment (if (and (not (:owner assignment)) (not (nil? td)))
(let [new-assignment (fixup-assignment assignment td)]
(.set-assignment! storm-cluster-state tid new-assignment)
new-assignment)
assignment)]
{tid assignment}))))
;; make the new assignments for topologies
new-scheduler-assignments (compute-new-scheduler-assignments
nimbus
existing-assignments
topologies
scratch-topology-id)
topology->executor->node+port (compute-new-topology->executor->node+port new-scheduler-assignments existing-assignments)
topology->executor->node+port (merge (into {} (for [id assigned-topology-ids] {id nil})) topology->executor->node+port)
new-assigned-worker->resources (convert-assignments-to-worker->resources new-scheduler-assignments)
now-secs (current-time-secs)
basic-supervisor-details-map (basic-supervisor-details-map storm-cluster-state)
;; construct the final Assignments by adding start-times etc into it
new-assignments (into {} (for [[topology-id executor->node+port] topology->executor->node+port
:let [existing-assignment (get existing-assignments topology-id)
all-nodes (->> executor->node+port vals (map first) set)
node->host (->> all-nodes
(mapcat (fn [node]
(if-let [host (.getHostName inimbus basic-supervisor-details-map node)]
[[node host]]
)))
(into {}))
all-node->host (merge (:node->host existing-assignment) node->host)
reassign-executors (changed-executors (:executor->node+port existing-assignment) executor->node+port)
start-times (merge (:executor->start-time-secs existing-assignment)
(into {}
(for [id reassign-executors]
[id now-secs]
)))
worker->resources (get new-assigned-worker->resources topology-id)]]
{topology-id (Assignment.
(conf STORM-LOCAL-DIR)
(select-keys all-node->host all-nodes)
executor->node+port
start-times
worker->resources
(.getTopologySubmitter (.get tds topology-id)))}))]
;; tasks figure out what tasks to talk to by looking at topology at runtime
;; only log/set when there's been a change to the assignment
(doseq [[topology-id assignment] new-assignments
:let [existing-assignment (get existing-assignments topology-id)
topology-details (.getById topologies topology-id)]]
(if (= existing-assignment assignment)
(log-debug "Assignment for " topology-id " hasn't changed")
(do
(log-message "Setting new assignment for topology id " topology-id ": " (pr-str assignment))
(.set-assignment! storm-cluster-state topology-id assignment)
)))
(->> new-assignments
(map (fn [[topology-id assignment]]
(let [existing-assignment (get existing-assignments topology-id)]
[topology-id (map to-worker-slot (newly-added-slots existing-assignment assignment))]
)))
(into {})
(.assignSlots inimbus topologies)))
(log-message "not a leader, skipping assignments")))
(defn notify-topology-action-listener [nimbus storm-id action]
(let [topology-action-notifier (:nimbus-topology-action-notifier nimbus)]
(when (not-nil? topology-action-notifier)
(try (.notify topology-action-notifier storm-id action)
(catch Exception e
(log-warn-error e "Ignoring exception from Topology action notifier for storm-Id " storm-id))))))
(defn- start-storm [nimbus storm-name storm-id topology-initial-status owner principal]
{:pre [(#{:active :inactive} topology-initial-status)]}
(let [storm-cluster-state (:storm-cluster-state nimbus)
conf (:conf nimbus)
blob-store (:blob-store nimbus)
storm-conf (read-storm-conf conf storm-id blob-store)
topology (system-topology! storm-conf (read-storm-topology storm-id blob-store))
num-executors (->> (all-components topology) (map-val num-start-executors))]
(log-message "Activating " storm-name ": " storm-id)
(.activate-storm! storm-cluster-state
storm-id
(StormBase. storm-name
(current-time-secs)
{:type topology-initial-status}
(storm-conf TOPOLOGY-WORKERS)
num-executors
owner
nil
nil
{}
principal))
(notify-topology-action-listener nimbus storm-name "activate")))
(defn storm-active? [storm-cluster-state storm-name]
(not-nil? (get-storm-id storm-cluster-state storm-name)))
(defn check-storm-active! [nimbus storm-name active?]
(if (= (not active?)
(storm-active? (:storm-cluster-state nimbus)
storm-name))
(if active?
(throw (NotAliveException. (str storm-name " is not alive")))
(throw (AlreadyAliveException. (str storm-name " is already active"))))
))
(defn check-authorization!
([nimbus storm-name storm-conf operation context]
(let [aclHandler (:authorization-handler nimbus)
impersonation-authorizer (:impersonation-authorization-handler nimbus)
ctx (or context (ReqContext/context))
check-conf (if storm-conf storm-conf (if storm-name {TOPOLOGY-NAME storm-name}))]
(if (.isImpersonating ctx)
(do
(log-warn "principal: " (.realPrincipal ctx) " is trying to impersonate principal: " (.principal ctx))
(if impersonation-authorizer
(when-not (.permit impersonation-authorizer ctx operation check-conf)
(log-thrift-access (.requestID ctx) (.remoteAddress ctx) (.principal ctx) operation storm-name "access-denied")
(throw (AuthorizationException. (str "principal " (.realPrincipal ctx) " is not authorized to impersonate
principal " (.principal ctx) " from host " (.remoteAddress ctx) " Please see SECURITY.MD to learn
how to configure impersonation acls."))))
(log-warn "impersonation attempt but " NIMBUS-IMPERSONATION-AUTHORIZER " has no authorizer configured. potential
security risk, please see SECURITY.MD to learn how to configure impersonation authorizer."))))
(if aclHandler
(if-not (.permit aclHandler ctx operation check-conf)
(do
(log-thrift-access (.requestID ctx) (.remoteAddress ctx) (.principal ctx) operation storm-name "access-denied")
(throw (AuthorizationException. (str operation (if storm-name (str " on topology " storm-name)) " is not authorized"))))
(log-thrift-access (.requestID ctx) (.remoteAddress ctx) (.principal ctx) operation storm-name "access-granted")))))
([nimbus storm-name storm-conf operation]
(check-authorization! nimbus storm-name storm-conf operation (ReqContext/context))))
(defn code-ids [blob-store]
(let [to-id (reify KeyFilter
(filter [this key] (get-id-from-blob-key key)))]
(set (.filterAndListKeys blob-store to-id))))
(defn cleanup-storm-ids [storm-cluster-state blob-store]
(let [heartbeat-ids (set (.heartbeat-storms storm-cluster-state))
error-ids (set (.error-topologies storm-cluster-state))
code-ids (code-ids blob-store)
backpressure-ids (set (.backpressure-topologies storm-cluster-state))
assigned-ids (set (.active-storms storm-cluster-state))]
(set/difference (set/union heartbeat-ids error-ids backpressure-ids code-ids) assigned-ids)
))
(defn extract-status-str [base]
(let [t (-> base :status :type)]
(.toUpperCase (name t))
))
(defn mapify-serializations [sers]
(->> sers
(map (fn [e] (if (map? e) e {e nil})))
(apply merge)
))
(defn- component-parallelism [storm-conf component]
(let [storm-conf (merge storm-conf (component-conf component))
num-tasks (or (storm-conf TOPOLOGY-TASKS) (num-start-executors component))
max-parallelism (storm-conf TOPOLOGY-MAX-TASK-PARALLELISM)
]
(if max-parallelism
(min max-parallelism num-tasks)
num-tasks)))
(defn normalize-topology [storm-conf ^StormTopology topology]
(let [ret (.deepCopy topology)]
(doseq [[_ component] (all-components ret)]
(.set_json_conf
(.get_common component)
(->> {TOPOLOGY-TASKS (component-parallelism storm-conf component)}
(merge (component-conf component))
to-json )))
ret ))
(defn normalize-conf [conf storm-conf ^StormTopology topology]
;; ensure that serializations are same for all tasks no matter what's on
;; the supervisors. this also allows you to declare the serializations as a sequence
(let [component-confs (map
#(-> (ThriftTopologyUtils/getComponentCommon topology %)
.get_json_conf
from-json)
(ThriftTopologyUtils/getComponentIds topology))
total-conf (merge conf storm-conf)
get-merged-conf-val (fn [k merge-fn]
(merge-fn
(concat
(mapcat #(get % k) component-confs)
(or (get storm-conf k)
(get conf k)))))]
;; topology level serialization registrations take priority
;; that way, if there's a conflict, a user can force which serialization to use
;; append component conf to storm-conf
(merge storm-conf
{TOPOLOGY-KRYO-DECORATORS (get-merged-conf-val TOPOLOGY-KRYO-DECORATORS distinct)
TOPOLOGY-KRYO-REGISTER (get-merged-conf-val TOPOLOGY-KRYO-REGISTER mapify-serializations)
TOPOLOGY-ACKER-EXECUTORS (total-conf TOPOLOGY-ACKER-EXECUTORS)
TOPOLOGY-EVENTLOGGER-EXECUTORS (total-conf TOPOLOGY-EVENTLOGGER-EXECUTORS)
TOPOLOGY-MAX-TASK-PARALLELISM (total-conf TOPOLOGY-MAX-TASK-PARALLELISM)})))
(defn blob-rm-key [blob-store key storm-cluster-state]
(try
(.deleteBlob blob-store key nimbus-subject)
(if (instance? LocalFsBlobStore blob-store)
(.remove-blobstore-key! storm-cluster-state key))
(catch Exception e
(log-message "Exception" e))))
(defn blob-rm-topology-keys [id blob-store storm-cluster-state]
(blob-rm-key blob-store (master-stormjar-key id) storm-cluster-state)
(blob-rm-key blob-store (master-stormconf-key id) storm-cluster-state)
(blob-rm-key blob-store (master-stormcode-key id) storm-cluster-state))
(defn force-delete-topo-dist-dir [conf id]
(rmr (master-stormdist-root conf id)))
(defn do-cleanup [nimbus]
(if (is-leader nimbus :throw-exception false)
(let [storm-cluster-state (:storm-cluster-state nimbus)
conf (:conf nimbus)
submit-lock (:submit-lock nimbus)
blob-store (:blob-store nimbus)]
(let [to-cleanup-ids (locking submit-lock
(cleanup-storm-ids storm-cluster-state blob-store))]
(when-not (empty? to-cleanup-ids)
(doseq [id to-cleanup-ids]
(log-message "Cleaning up " id)
(.teardown-heartbeats! storm-cluster-state id)
(.teardown-topology-errors! storm-cluster-state id)
(.remove-backpressure! storm-cluster-state id)
(force-delete-topo-dist-dir conf id)
(blob-rm-topology-keys id blob-store storm-cluster-state)
(swap! (:heartbeats-cache nimbus) dissoc id)))))
(log-message "not a leader, skipping cleanup")))
(defn- file-older-than? [now seconds file]
(<= (+ (.lastModified file) (to-millis seconds)) (to-millis now)))
(defn clean-inbox [dir-location seconds]
"Deletes jar files in dir older than seconds."
(let [now (current-time-secs)
pred #(and (.isFile %) (file-older-than? now seconds %))
files (filter pred (file-seq (File. dir-location)))]
(doseq [f files]
(if (.delete f)
(log-message "Cleaning inbox ... deleted: " (.getName f))
;; This should never happen
(log-error "Cleaning inbox ... error deleting: " (.getName f))))))
(defn clean-topology-history
"Deletes topologies from history older than minutes."
[mins nimbus]
(locking (:topology-history-lock nimbus)
(let [cutoff-age (- (current-time-secs) (* mins 60))
topo-history-state (:topo-history-state nimbus)
curr-history (vec (ls-topo-hist topo-history-state))
new-history (vec (filter (fn [line]
(> (line :timestamp) cutoff-age)) curr-history))]
(ls-topo-hist! topo-history-state new-history))))
(defn setup-blobstore [nimbus]
"Sets up blobstore state for all current keys."
(let [storm-cluster-state (:storm-cluster-state nimbus)
blob-store (:blob-store nimbus)
local-set-of-keys (set (get-key-seq-from-blob-store blob-store))
all-keys (set (.active-keys storm-cluster-state))
locally-available-active-keys (set/intersection local-set-of-keys all-keys)
keys-to-delete (set/difference local-set-of-keys all-keys)
conf (:conf nimbus)
nimbus-host-port-info (:nimbus-host-port-info nimbus)]
(log-debug "Deleting keys not on the zookeeper" keys-to-delete)
(doseq [key keys-to-delete]
(.deleteBlob blob-store key nimbus-subject))
(log-debug "Creating list of key entries for blobstore inside zookeeper" all-keys "local" locally-available-active-keys)
(doseq [key locally-available-active-keys]
(try
(.setup-blobstore! storm-cluster-state key (:nimbus-host-port-info nimbus) (get-version-for-key key nimbus-host-port-info conf))
(catch KeyNotFoundException _
; invalid key, remove it from blobstore
(.deleteBlob blob-store key nimbus-subject))))))
(defn- get-errors [storm-cluster-state storm-id component-id]
(->> (.errors storm-cluster-state storm-id component-id)
(map #(doto (ErrorInfo. (:error %) (:time-secs %))
(.set_host (:host %))
(.set_port (:port %))))))
(defn- thriftify-executor-id [[first-task-id last-task-id]]
(ExecutorInfo. (int first-task-id) (int last-task-id)))
(def DISALLOWED-TOPOLOGY-NAME-STRS #{"/" "." ":" "\\"})
(defn validate-topology-name! [name]
(if (some #(.contains name %) DISALLOWED-TOPOLOGY-NAME-STRS)
(throw (InvalidTopologyException.
(str "Topology name cannot contain any of the following: " (pr-str DISALLOWED-TOPOLOGY-NAME-STRS))))
(if (clojure.string/blank? name)
(throw (InvalidTopologyException.
("Topology name cannot be blank"))))))
;; We will only file at <Storm dist root>/<Topology ID>/<File>
;; to be accessed via Thrift
;; ex., storm-local/nimbus/stormdist/aa-1-1377104853/stormjar.jar
(defn check-file-access [conf file-path]
(log-debug "check file access:" file-path)
(try
(if (not= (.getCanonicalFile (File. (master-stormdist-root conf)))
(-> (File. file-path) .getCanonicalFile .getParentFile .getParentFile))
(throw (AuthorizationException. (str "Invalid file path: " file-path))))
(catch Exception e
(throw (AuthorizationException. (str "Invalid file path: " file-path))))))
(defn try-read-storm-conf
[conf storm-id blob-store]
(try-cause
(read-storm-conf-as-nimbus storm-id blob-store)
(catch KeyNotFoundException e
(throw (NotAliveException. (str storm-id))))))
(defn try-read-storm-conf-from-name
[conf storm-name nimbus]
(let [storm-cluster-state (:storm-cluster-state nimbus)
blob-store (:blob-store nimbus)
id (get-storm-id storm-cluster-state storm-name)]
(try-read-storm-conf conf id blob-store)))
(defn try-read-storm-topology
[storm-id blob-store]
(try-cause
(read-storm-topology-as-nimbus storm-id blob-store)
(catch KeyNotFoundException e
(throw (NotAliveException. (str storm-id))))))
(defn add-topology-to-history-log
[storm-id nimbus topology-conf]
(log-message "Adding topo to history log: " storm-id)
(locking (:topology-history-lock nimbus)
(let [topo-history-state (:topo-history-state nimbus)
users (get-topo-logs-users topology-conf)
groups (get-topo-logs-groups topology-conf)
curr-history (vec (ls-topo-hist topo-history-state))
new-history (conj curr-history {:topoid storm-id :timestamp (current-time-secs)
:users users :groups groups})]
(ls-topo-hist! topo-history-state new-history))))
(defn igroup-mapper
[storm-conf]
(AuthUtils/GetGroupMappingServiceProviderPlugin storm-conf))
(defn user-groups
[user storm-conf]
(if (clojure.string/blank? user) [] (.getGroups (igroup-mapper storm-conf) user)))
(defn does-users-group-intersect?
"Check to see if any of the users groups intersect with the list of groups passed in"
[user groups-to-check storm-conf]
(let [groups (user-groups user storm-conf)]
(> (.size (set/intersection (set groups) (set groups-to-check))) 0)))
(defn read-topology-history
[nimbus user admin-users]
(let [topo-history-state (:topo-history-state nimbus)
curr-history (vec (ls-topo-hist topo-history-state))
topo-user-can-access (fn [line user storm-conf]
(if (nil? user)
(line :topoid)
(if (or (some #(= % user) admin-users)
(does-users-group-intersect? user (line :groups) storm-conf)
(some #(= % user) (line :users)))
(line :topoid)
nil)))]
(remove nil? (map #(topo-user-can-access % user (:conf nimbus)) curr-history))))
(defn renew-credentials [nimbus]
(if (is-leader nimbus :throw-exception false)
(let [storm-cluster-state (:storm-cluster-state nimbus)
blob-store (:blob-store nimbus)
renewers (:cred-renewers nimbus)
update-lock (:cred-update-lock nimbus)
assigned-ids (set (.active-storms storm-cluster-state))]
(when-not (empty? assigned-ids)
(doseq [id assigned-ids]
(locking update-lock
(let [orig-creds (.credentials storm-cluster-state id nil)
storm-base (.storm-base storm-cluster-state id nil)
topology-conf (try-read-storm-conf (:conf nimbus) id blob-store)]
(if orig-creds
(let [new-creds (HashMap. orig-creds)]
(doseq [renewer renewers]
(log-message "Renewing Creds For " id " with " renewer)
;;Instead of trying to use reflection to make this work, lets just catch the error
;; when it does not work
(try
(.renew renewer new-creds (Collections/unmodifiableMap topology-conf) (:principal storm-base))
(catch clojure.lang.ArityException e
(.renew renewer new-creds (Collections/unmodifiableMap topology-conf)))))
(when-not (= orig-creds new-creds)
(.set-credentials! storm-cluster-state id new-creds topology-conf)
))))))))
(log-message "not a leader, skipping credential renewal.")))
(defn validate-topology-size [topo-conf nimbus-conf topology]
(let [workers-count (get topo-conf TOPOLOGY-WORKERS)
workers-allowed (get nimbus-conf NIMBUS-SLOTS-PER-TOPOLOGY)
num-executors (->> (all-components topology) (map-val num-start-executors))
executors-count (reduce + (vals num-executors))
executors-allowed (get nimbus-conf NIMBUS-EXECUTORS-PER-TOPOLOGY)]
(when (and
(not (nil? executors-allowed))
(> executors-count executors-allowed))
(throw
(InvalidTopologyException.
(str "Failed to submit topology. Topology requests more than " executors-allowed " executors."))))
(when (and
(not (nil? workers-allowed))
(> workers-count workers-allowed))
(throw
(InvalidTopologyException.
(str "Failed to submit topology. Topology requests more than " workers-allowed " workers."))))))
(defn- set-logger-timeouts [log-config]
(let [timeout-secs (.get_reset_log_level_timeout_secs log-config)
timeout (time/plus (time/now) (time/secs timeout-secs))]
(if (time/after? timeout (time/now))
(.set_reset_log_level_timeout_epoch log-config (coerce/to-long timeout))
(.unset_reset_log_level_timeout_epoch log-config))))
(defmethod blob-sync :distributed [conf nimbus]
(if (not (is-leader nimbus :throw-exception false))
(let [storm-cluster-state (:storm-cluster-state nimbus)
nimbus-host-port-info (:nimbus-host-port-info nimbus)
blob-store-key-set (set (get-key-seq-from-blob-store (:blob-store nimbus)))
zk-key-set (set (.blobstore storm-cluster-state (fn [] (blob-sync conf nimbus))))]
(log-debug "blob-sync " "blob-store-keys " blob-store-key-set "zookeeper-keys " zk-key-set)
(let [sync-blobs (doto
(BlobSynchronizer. (:blob-store nimbus) conf)
(.setNimbusInfo nimbus-host-port-info)
(.setBlobStoreKeySet blob-store-key-set)
(.setZookeeperKeySet zk-key-set))]
(.syncBlobs sync-blobs)))))
(defmethod blob-sync :local [conf nimbus]
nil)
(defserverfn service-handler [conf inimbus]
(.prepare inimbus conf (master-inimbus-dir conf))
(log-message "Starting Nimbus with conf " conf)
(let [nimbus (nimbus-data conf inimbus)
blob-store (:blob-store nimbus)
principal-to-local (AuthUtils/GetPrincipalToLocalPlugin conf)
admin-users (or (.get conf NIMBUS-ADMINS) [])
get-common-topo-info
(fn [^String storm-id operation]
(let [storm-cluster-state (:storm-cluster-state nimbus)
topology-conf (try-read-storm-conf conf storm-id blob-store)
storm-name (topology-conf TOPOLOGY-NAME)
_ (check-authorization! nimbus
storm-name
topology-conf
operation)
topology (try-read-storm-topology storm-id blob-store)
task->component (storm-task-info topology topology-conf)
base (.storm-base storm-cluster-state storm-id nil)
launch-time-secs (if base (:launch-time-secs base)
(throw
(NotAliveException. (str storm-id))))
assignment (.assignment-info storm-cluster-state storm-id nil)
beats (map-val :heartbeat (get @(:heartbeats-cache nimbus)
storm-id))
all-components (set (vals task->component))]
{:storm-name storm-name
:storm-cluster-state storm-cluster-state
:all-components all-components
:launch-time-secs launch-time-secs
:assignment assignment
:beats beats
:topology topology
:task->component task->component
:base base}))
get-last-error (fn [storm-cluster-state storm-id component-id]
(if-let [e (.last-error storm-cluster-state
storm-id
component-id)]
(doto (ErrorInfo. (:error e) (:time-secs e))
(.set_host (:host e))
(.set_port (:port e)))))]
(.prepare ^org.apache.storm.nimbus.ITopologyValidator (:validator nimbus) conf)
;add to nimbuses
(.add-nimbus-host! (:storm-cluster-state nimbus) (.toHostPortString (:nimbus-host-port-info nimbus))
(NimbusSummary.
(.getHost (:nimbus-host-port-info nimbus))
(.getPort (:nimbus-host-port-info nimbus))
(current-time-secs)
false ;is-leader
STORM-VERSION))
(.addToLeaderLockQueue (:leader-elector nimbus))
(when (instance? LocalFsBlobStore blob-store)
;register call back for blob-store
(.blobstore (:storm-cluster-state nimbus) (fn [] (blob-sync conf nimbus)))
(setup-blobstore nimbus))
(when (is-leader nimbus :throw-exception false)
(doseq [storm-id (.active-storms (:storm-cluster-state nimbus))]
(transition! nimbus storm-id :startup)))
(schedule-recurring (:timer nimbus)
0
(conf NIMBUS-MONITOR-FREQ-SECS)
(fn []
(when-not (conf NIMBUS-DO-NOT-REASSIGN)
(locking (:submit-lock nimbus)
(mk-assignments nimbus)))
(do-cleanup nimbus)))
;; Schedule Nimbus inbox cleaner
(schedule-recurring (:timer nimbus)
0
(conf NIMBUS-CLEANUP-INBOX-FREQ-SECS)
(fn []
(clean-inbox (inbox nimbus) (conf NIMBUS-INBOX-JAR-EXPIRATION-SECS))))
;; Schedule nimbus code sync thread to sync code from other nimbuses.
(if (instance? LocalFsBlobStore blob-store)
(schedule-recurring (:timer nimbus)
0
(conf NIMBUS-CODE-SYNC-FREQ-SECS)
(fn []
(blob-sync conf nimbus))))
;; Schedule topology history cleaner
(when-let [interval (conf LOGVIEWER-CLEANUP-INTERVAL-SECS)]
(schedule-recurring (:timer nimbus)
0
(conf LOGVIEWER-CLEANUP-INTERVAL-SECS)
(fn []
(clean-topology-history (conf LOGVIEWER-CLEANUP-AGE-MINS) nimbus))))
(schedule-recurring (:timer nimbus)
0
(conf NIMBUS-CREDENTIAL-RENEW-FREQ-SECS)
(fn []
(renew-credentials nimbus)))
(defgauge nimbus:num-supervisors
(fn [] (.size (.supervisors (:storm-cluster-state nimbus) nil))))
(start-metrics-reporters conf)
(reify Nimbus$Iface
(^void submitTopologyWithOpts
[this ^String storm-name ^String uploadedJarLocation ^String serializedConf ^StormTopology topology
^SubmitOptions submitOptions]
(try
(mark! nimbus:num-submitTopologyWithOpts-calls)
(is-leader nimbus)
(assert (not-nil? submitOptions))
(validate-topology-name! storm-name)
(check-authorization! nimbus storm-name nil "submitTopology")
(check-storm-active! nimbus storm-name false)
(let [topo-conf (from-json serializedConf)]
(try
(validate-configs-with-schemas topo-conf)
(catch IllegalArgumentException ex
(throw (InvalidTopologyException. (.getMessage ex)))))
(.validate ^org.apache.storm.nimbus.ITopologyValidator (:validator nimbus)
storm-name
topo-conf
topology)
(when (.get conf DISABLE-SYMLINKS)
(let [blob-map (.get topo-conf TOPOLOGY-BLOBSTORE-MAP)]
(when (and (not-nil? blob-map) (not (.isEmpty blob-map)))
(throw (InvalidTopologyException.
(str "symlinks are disabled so blobs are not supported but " TOPOLOGY-BLOBSTORE-MAP
" = " blob-map)))))))
(swap! (:submitted-count nimbus) inc)
(let [storm-id (str storm-name "-" @(:submitted-count nimbus) "-" (current-time-secs))
credentials (.get_creds submitOptions)
credentials (when credentials (.get_creds credentials))
topo-conf (from-json serializedConf)
storm-conf-submitted (normalize-conf
conf
(-> topo-conf
(assoc STORM-ID storm-id)
(assoc TOPOLOGY-NAME storm-name))
topology)
req (ReqContext/context)
principal (.principal req)
submitter-principal (if principal (.toString principal))
submitter-user (.toLocal principal-to-local principal)
system-user (System/getProperty "user.name")
topo-acl (distinct (remove nil? (conj (.get storm-conf-submitted TOPOLOGY-USERS) submitter-principal, submitter-user)))
storm-conf (-> storm-conf-submitted
(assoc TOPOLOGY-SUBMITTER-PRINCIPAL (if submitter-principal submitter-principal ""))
(assoc TOPOLOGY-SUBMITTER-USER (if submitter-user submitter-user system-user)) ;Don't let the user set who we launch as
(assoc TOPOLOGY-USERS topo-acl)
(assoc STORM-ZOOKEEPER-SUPERACL (.get conf STORM-ZOOKEEPER-SUPERACL)))
storm-conf (if (Utils/isZkAuthenticationConfiguredStormServer conf)
storm-conf
(dissoc storm-conf STORM-ZOOKEEPER-TOPOLOGY-AUTH-SCHEME STORM-ZOOKEEPER-TOPOLOGY-AUTH-PAYLOAD))
total-storm-conf (merge conf storm-conf)
topology (normalize-topology total-storm-conf topology)
storm-cluster-state (:storm-cluster-state nimbus)]
(when credentials (doseq [nimbus-autocred-plugin (:nimbus-autocred-plugins nimbus)]
(.populateCredentials nimbus-autocred-plugin credentials (Collections/unmodifiableMap storm-conf))))
(if (and (conf SUPERVISOR-RUN-WORKER-AS-USER) (or (nil? submitter-user) (.isEmpty (.trim submitter-user))))
(throw (AuthorizationException. "Could not determine the user to run this topology as.")))
(system-topology! total-storm-conf topology) ;; this validates the structure of the topology
(validate-topology-size topo-conf conf topology)
(when (and (Utils/isZkAuthenticationConfiguredStormServer conf)
(not (Utils/isZkAuthenticationConfiguredTopology storm-conf)))
(throw (IllegalArgumentException. "The cluster is configured for zookeeper authentication, but no payload was provided.")))
(log-message "Received topology submission for "
storm-name
" (storm-" (.get_storm_version topology)
" JDK-" (.get_jdk_version topology)
") with conf "
(redact-value storm-conf STORM-ZOOKEEPER-TOPOLOGY-AUTH-PAYLOAD))
;; lock protects against multiple topologies being submitted at once and
;; cleanup thread killing topology in b/w assignment and starting the topology
(locking (:submit-lock nimbus)
(check-storm-active! nimbus storm-name false)
;;cred-update-lock is not needed here because creds are being added for the first time.
(.set-credentials! storm-cluster-state storm-id credentials storm-conf)
(log-message "uploadedJar " uploadedJarLocation)
(setup-storm-code nimbus conf storm-id uploadedJarLocation total-storm-conf topology)
(wait-for-desired-code-replication nimbus total-storm-conf storm-id)
(.setup-heartbeats! storm-cluster-state storm-id)
(if (total-storm-conf TOPOLOGY-BACKPRESSURE-ENABLE)
(.setup-backpressure! storm-cluster-state storm-id))
(notify-topology-action-listener nimbus storm-name "submitTopology")
(let [thrift-status->kw-status {TopologyInitialStatus/INACTIVE :inactive
TopologyInitialStatus/ACTIVE :active}]
(start-storm nimbus storm-name storm-id (thrift-status->kw-status (.get_initial_status submitOptions)) submitter-user submitter-principal))))
(catch Throwable e
(log-warn-error e "Topology submission exception. (topology name='" storm-name "')")
(throw e))))
(^void submitTopology
[this ^String storm-name ^String uploadedJarLocation ^String serializedConf ^StormTopology topology]
(mark! nimbus:num-submitTopology-calls)
(.submitTopologyWithOpts this storm-name uploadedJarLocation serializedConf topology
(SubmitOptions. TopologyInitialStatus/ACTIVE)))
(^void killTopology [this ^String name]
(mark! nimbus:num-killTopology-calls)
(.killTopologyWithOpts this name (KillOptions.)))
(^void killTopologyWithOpts [this ^String storm-name ^KillOptions options]
(mark! nimbus:num-killTopologyWithOpts-calls)
(check-storm-active! nimbus storm-name true)
(let [topology-conf (try-read-storm-conf-from-name conf storm-name nimbus)
storm-id (topology-conf STORM-ID)
operation "killTopology"]
(check-authorization! nimbus storm-name topology-conf operation)
(let [wait-amt (if (.is_set_wait_secs options)
(.get_wait_secs options)
)]
(transition-name! nimbus storm-name [:kill wait-amt] true)
(notify-topology-action-listener nimbus storm-name operation))
(add-topology-to-history-log (get-storm-id (:storm-cluster-state nimbus) storm-name)
nimbus topology-conf)))
(^void rebalance [this ^String storm-name ^RebalanceOptions options]
(mark! nimbus:num-rebalance-calls)
(check-storm-active! nimbus storm-name true)
(let [topology-conf (try-read-storm-conf-from-name conf storm-name nimbus)
operation "rebalance"]
(check-authorization! nimbus storm-name topology-conf operation)
(let [wait-amt (if (.is_set_wait_secs options)
(.get_wait_secs options))
num-workers (if (.is_set_num_workers options)
(.get_num_workers options))
executor-overrides (if (.is_set_num_executors options)
(.get_num_executors options)
{})]
(doseq [[c num-executors] executor-overrides]
(when (<= num-executors 0)
(throw (InvalidTopologyException. "Number of executors must be greater than 0"))
))
(transition-name! nimbus storm-name [:rebalance wait-amt num-workers executor-overrides] true)
(notify-topology-action-listener nimbus storm-name operation))))
(activate [this storm-name]
(mark! nimbus:num-activate-calls)
(let [topology-conf (try-read-storm-conf-from-name conf storm-name nimbus)
operation "activate"]
(check-authorization! nimbus storm-name topology-conf operation)
(transition-name! nimbus storm-name :activate true)
(notify-topology-action-listener nimbus storm-name operation)))
(deactivate [this storm-name]
(mark! nimbus:num-deactivate-calls)
(let [topology-conf (try-read-storm-conf-from-name conf storm-name nimbus)
operation "deactivate"]
(check-authorization! nimbus storm-name topology-conf operation)
(transition-name! nimbus storm-name :inactivate true)
(notify-topology-action-listener nimbus storm-name operation)))
(debug [this storm-name component-id enable? samplingPct]
(mark! nimbus:num-debug-calls)
(let [storm-cluster-state (:storm-cluster-state nimbus)
storm-id (get-storm-id storm-cluster-state storm-name)
topology-conf (try-read-storm-conf conf storm-id blob-store)
;; make sure samplingPct is within bounds.
spct (Math/max (Math/min samplingPct 100.0) 0.0)
;; while disabling we retain the sampling pct.
debug-options (if enable? {:enable enable? :samplingpct spct} {:enable enable?})
storm-base-updates (assoc {} :component->debug (if (empty? component-id)
{storm-id debug-options}
{component-id debug-options}))]
(check-authorization! nimbus storm-name topology-conf "debug")
(when-not storm-id
(throw (NotAliveException. storm-name)))
(log-message "Nimbus setting debug to " enable? " for storm-name '" storm-name "' storm-id '" storm-id "' sampling pct '" spct "'"
(if (not (clojure.string/blank? component-id)) (str " component-id '" component-id "'")))
(locking (:submit-lock nimbus)
(.update-storm! storm-cluster-state storm-id storm-base-updates))))
(^void setWorkerProfiler
[this ^String id ^ProfileRequest profileRequest]
(mark! nimbus:num-setWorkerProfiler-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)
_ (check-authorization! nimbus storm-name topology-conf "setWorkerProfiler")
storm-cluster-state (:storm-cluster-state nimbus)]
(.set-worker-profile-request storm-cluster-state id profileRequest)))
(^List getComponentPendingProfileActions
[this ^String id ^String component_id ^ProfileAction action]
(mark! nimbus:num-getComponentPendingProfileActions-calls)
(let [info (get-common-topo-info id "getComponentPendingProfileActions")
storm-cluster-state (:storm-cluster-state info)
task->component (:task->component info)
{:keys [executor->node+port node->host]} (:assignment info)
executor->host+port (map-val (fn [[node port]]
[(node->host node) port])
executor->node+port)
nodeinfos (stats/extract-nodeinfos-from-hb-for-comp executor->host+port task->component false component_id)
all-pending-actions-for-topology (.get-topology-profile-requests storm-cluster-state id true)
latest-profile-actions (remove nil? (map (fn [nodeInfo]
(->> all-pending-actions-for-topology
(filter #(and (= (:host nodeInfo) (.get_node (.get_nodeInfo %)))
(= (:port nodeInfo) (first (.get_port (.get_nodeInfo %))))))
(filter #(= action (.get_action %)))
(sort-by #(.get_time_stamp %) >)
first))
nodeinfos))]
(log-message "Latest profile actions for topology " id " component " component_id " " (pr-str latest-profile-actions))
latest-profile-actions))
(^void setLogConfig [this ^String id ^LogConfig log-config-msg]
(mark! nimbus:num-setLogConfig-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)
_ (check-authorization! nimbus storm-name topology-conf "setLogConfig")
storm-cluster-state (:storm-cluster-state nimbus)
merged-log-config (or (.topology-log-config storm-cluster-state id nil) (LogConfig.))
named-loggers (.get_named_logger_level merged-log-config)]
(doseq [[_ level] named-loggers]
(.set_action level LogLevelAction/UNCHANGED))
(doseq [[logger-name log-config] (.get_named_logger_level log-config-msg)]
(let [action (.get_action log-config)]
(if (clojure.string/blank? logger-name)
(throw (RuntimeException. "Named loggers need a valid name. Use ROOT for the root logger")))
(condp = action
LogLevelAction/UPDATE
(do (set-logger-timeouts log-config)
(.put_to_named_logger_level merged-log-config logger-name log-config))
LogLevelAction/REMOVE
(let [named-loggers (.get_named_logger_level merged-log-config)]
(if (and (not (nil? named-loggers))
(.containsKey named-loggers logger-name))
(.remove named-loggers logger-name))))))
(log-message "Setting log config for " storm-name ":" merged-log-config)
(.set-topology-log-config! storm-cluster-state id merged-log-config)))
(uploadNewCredentials [this storm-name credentials]
(mark! nimbus:num-uploadNewCredentials-calls)
(let [storm-cluster-state (:storm-cluster-state nimbus)
storm-id (get-storm-id storm-cluster-state storm-name)
topology-conf (try-read-storm-conf conf storm-id blob-store)
creds (when credentials (.get_creds credentials))]
(check-authorization! nimbus storm-name topology-conf "uploadNewCredentials")
(locking (:cred-update-lock nimbus) (.set-credentials! storm-cluster-state storm-id creds topology-conf))))
(beginFileUpload [this]
(mark! nimbus:num-beginFileUpload-calls)
(check-authorization! nimbus nil nil "fileUpload")
(let [fileloc (str (inbox nimbus) "/stormjar-" (uuid) ".jar")]
(.put (:uploaders nimbus)
fileloc
(Channels/newChannel (FileOutputStream. fileloc)))
(log-message "Uploading file from client to " fileloc)
fileloc
))
(^void uploadChunk [this ^String location ^ByteBuffer chunk]
(mark! nimbus:num-uploadChunk-calls)
(check-authorization! nimbus nil nil "fileUpload")
(let [uploaders (:uploaders nimbus)
^WritableByteChannel channel (.get uploaders location)]
(when-not channel
(throw (RuntimeException.
"File for that location does not exist (or timed out)")))
(.write channel chunk)
(.put uploaders location channel)
))
(^void finishFileUpload [this ^String location]
(mark! nimbus:num-finishFileUpload-calls)
(check-authorization! nimbus nil nil "fileUpload")
(let [uploaders (:uploaders nimbus)
^WritableByteChannel channel (.get uploaders location)]
(when-not channel
(throw (RuntimeException.
"File for that location does not exist (or timed out)")))
(.close channel)
(log-message "Finished uploading file from client: " location)
(.remove uploaders location)
))
(^String beginFileDownload
[this ^String file]
(mark! nimbus:num-beginFileDownload-calls)
(check-authorization! nimbus nil nil "fileDownload")
(let [is (BufferInputStream. (.getBlob (:blob-store nimbus) file nil)
^Integer (Utils/getInt (conf STORM-BLOBSTORE-INPUTSTREAM-BUFFER-SIZE-BYTES)
(int 65536)))
id (uuid)]
(.put (:downloaders nimbus) id is)
id))
(^ByteBuffer downloadChunk [this ^String id]
(mark! nimbus:num-downloadChunk-calls)
(check-authorization! nimbus nil nil "fileDownload")
(let [downloaders (:downloaders nimbus)
^BufferInputStream is (.get downloaders id)]
(when-not is
(throw (RuntimeException.
"Could not find input stream for id " id)))
(let [ret (.read is)]
(.put downloaders id is)
(when (empty? ret)
(.close is)
(.remove downloaders id))
(ByteBuffer/wrap ret))))
(^String getNimbusConf [this]
(mark! nimbus:num-getNimbusConf-calls)
(check-authorization! nimbus nil nil "getNimbusConf")
(to-json (:conf nimbus)))
(^LogConfig getLogConfig [this ^String id]
(mark! nimbus:num-getLogConfig-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)
_ (check-authorization! nimbus storm-name topology-conf "getLogConfig")
storm-cluster-state (:storm-cluster-state nimbus)
log-config (.topology-log-config storm-cluster-state id nil)]
(if log-config log-config (LogConfig.))))
(^String getTopologyConf [this ^String id]
(mark! nimbus:num-getTopologyConf-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)]
(check-authorization! nimbus storm-name topology-conf "getTopologyConf")
(to-json topology-conf)))
(^StormTopology getTopology [this ^String id]
(mark! nimbus:num-getTopology-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)]
(check-authorization! nimbus storm-name topology-conf "getTopology")
(system-topology! topology-conf (try-read-storm-topology id (:blob-store nimbus)))))
(^StormTopology getUserTopology [this ^String id]
(mark! nimbus:num-getUserTopology-calls)
(let [topology-conf (try-read-storm-conf conf id (:blob-store nimbus))
storm-name (topology-conf TOPOLOGY-NAME)]
(check-authorization! nimbus storm-name topology-conf "getUserTopology")
(try-read-storm-topology id blob-store)))
(^ClusterSummary getClusterInfo [this]
(mark! nimbus:num-getClusterInfo-calls)
(check-authorization! nimbus nil nil "getClusterInfo")
(let [storm-cluster-state (:storm-cluster-state nimbus)
supervisor-infos (all-supervisor-info storm-cluster-state)
;; TODO: need to get the port info about supervisors...
;; in standalone just look at metadata, otherwise just say N/A?
supervisor-summaries (dofor [[id info] supervisor-infos]
(let [ports (set (:meta info)) ;;TODO: this is only true for standalone
sup-sum (SupervisorSummary. (:hostname info)
(:uptime-secs info)
(count ports)
(count (:used-ports info))
id) ]
(.set_total_resources sup-sum (map-val double (:resources-map info)))
(when-let [[total-mem total-cpu used-mem used-cpu] (.get @(:node-id->resources nimbus) id)]
(.set_used_mem sup-sum used-mem)
(.set_used_cpu sup-sum used-cpu))
(when-let [version (:version info)] (.set_version sup-sum version))
sup-sum))
nimbus-uptime ((:uptime nimbus))
bases (topology-bases storm-cluster-state)
nimbuses (.nimbuses storm-cluster-state)
;;update the isLeader field for each nimbus summary
_ (let [leader (.getLeader (:leader-elector nimbus))
leader-host (.getHost leader)
leader-port (.getPort leader)]
(doseq [nimbus-summary nimbuses]
(.set_uptime_secs nimbus-summary (time-delta (.get_uptime_secs nimbus-summary)))
(.set_isLeader nimbus-summary (and (= leader-host (.get_host nimbus-summary)) (= leader-port (.get_port nimbus-summary))))))
topology-summaries (dofor [[id base] bases :when base]
(let [assignment (.assignment-info storm-cluster-state id nil)
topo-summ (TopologySummary. id
(:storm-name base)
(->> (:executor->node+port assignment)
keys
(mapcat executor-id->tasks)
count)
(->> (:executor->node+port assignment)
keys
count)
(->> (:executor->node+port assignment)
vals
set
count)
(time-delta (:launch-time-secs base))
(extract-status-str base))]
(when-let [owner (:owner base)] (.set_owner topo-summ owner))
(when-let [sched-status (.get @(:id->sched-status nimbus) id)] (.set_sched_status topo-summ sched-status))
(when-let [resources (.get @(:id->resources nimbus) id)]
(.set_requested_memonheap topo-summ (get resources 0))
(.set_requested_memoffheap topo-summ (get resources 1))
(.set_requested_cpu topo-summ (get resources 2))
(.set_assigned_memonheap topo-summ (get resources 3))
(.set_assigned_memoffheap topo-summ (get resources 4))
(.set_assigned_cpu topo-summ (get resources 5)))
(.set_replication_count topo-summ (get-blob-replication-count (master-stormcode-key id) nimbus))
topo-summ))
ret (ClusterSummary. supervisor-summaries
topology-summaries
nimbuses)
_ (.set_nimbus_uptime_secs ret nimbus-uptime)]
ret))
(^TopologyInfo getTopologyInfoWithOpts [this ^String storm-id ^GetInfoOptions options]
(mark! nimbus:num-getTopologyInfoWithOpts-calls)
(let [{:keys [storm-name
storm-cluster-state
all-components
launch-time-secs
assignment
beats
task->component
base]} (get-common-topo-info storm-id "getTopologyInfo")
num-err-choice (or (.get_num_err_choice options)
NumErrorsChoice/ALL)
errors-fn (condp = num-err-choice
NumErrorsChoice/NONE (fn [& _] ()) ;; empty list only
NumErrorsChoice/ONE (comp #(remove nil? %)
list
get-last-error)
NumErrorsChoice/ALL get-errors
;; Default
(do
(log-warn "Got invalid NumErrorsChoice '"
num-err-choice
"'")
get-errors))
errors (->> all-components
(map (fn [c] [c (errors-fn storm-cluster-state storm-id c)]))
(into {}))
executor-summaries (dofor [[executor [node port]] (:executor->node+port assignment)]
(let [host (-> assignment :node->host (get node))
heartbeat (get beats executor)
stats (:stats heartbeat)
stats (if stats
(stats/thriftify-executor-stats stats))]
(doto
(ExecutorSummary. (thriftify-executor-id executor)
(-> executor first task->component)
host
port
(nil-to-zero (:uptime heartbeat)))
(.set_stats stats))
))
topo-info (TopologyInfo. storm-id
storm-name
(time-delta launch-time-secs)
executor-summaries
(extract-status-str base)
errors
)]
(when-let [owner (:owner base)] (.set_owner topo-info owner))
(when-let [sched-status (.get @(:id->sched-status nimbus) storm-id)] (.set_sched_status topo-info sched-status))
(when-let [resources (.get @(:id->resources nimbus) storm-id)]
(.set_requested_memonheap topo-info (get resources 0))
(.set_requested_memoffheap topo-info (get resources 1))
(.set_requested_cpu topo-info (get resources 2))
(.set_assigned_memonheap topo-info (get resources 3))
(.set_assigned_memoffheap topo-info (get resources 4))
(.set_assigned_cpu topo-info (get resources 5)))
(when-let [component->debug (:component->debug base)]
(.set_component_debug topo-info (map-val converter/thriftify-debugoptions component->debug)))
(.set_replication_count topo-info (get-blob-replication-count (master-stormcode-key storm-id) nimbus))
topo-info))
(^TopologyInfo getTopologyInfo [this ^String topology-id]
(mark! nimbus:num-getTopologyInfo-calls)
(.getTopologyInfoWithOpts this
topology-id
(doto (GetInfoOptions.) (.set_num_err_choice NumErrorsChoice/ALL))))
(^String beginCreateBlob [this
^String blob-key
^SettableBlobMeta blob-meta]
(let [session-id (uuid)]
(.put (:blob-uploaders nimbus)
session-id
(.createBlob (:blob-store nimbus) blob-key blob-meta (get-subject)))
(log-message "Created blob for " blob-key
" with session id " session-id)
(str session-id)))
(^String beginUpdateBlob [this ^String blob-key]
(let [^AtomicOutputStream os (.updateBlob (:blob-store nimbus)
blob-key (get-subject))]
(let [session-id (uuid)]
(.put (:blob-uploaders nimbus) session-id os)
(log-message "Created upload session for " blob-key
" with id " session-id)
(str session-id))))
(^void createStateInZookeeper [this ^String blob-key]
(let [storm-cluster-state (:storm-cluster-state nimbus)
blob-store (:blob-store nimbus)
nimbus-host-port-info (:nimbus-host-port-info nimbus)
conf (:conf nimbus)]
(if (instance? LocalFsBlobStore blob-store)
(.setup-blobstore! storm-cluster-state blob-key nimbus-host-port-info (get-version-for-key blob-key nimbus-host-port-info conf)))
(log-debug "Created state in zookeeper" storm-cluster-state blob-store nimbus-host-port-info)))
(^void uploadBlobChunk [this ^String session ^ByteBuffer blob-chunk]
(let [uploaders (:blob-uploaders nimbus)]
(if-let [^AtomicOutputStream os (.get uploaders session)]
(let [chunk-array (.array blob-chunk)
remaining (.remaining blob-chunk)
array-offset (.arrayOffset blob-chunk)
position (.position blob-chunk)]
(.write os chunk-array (+ array-offset position) remaining)
(.put uploaders session os))
(throw-runtime "Blob for session "
session
" does not exist (or timed out)"))))
(^void finishBlobUpload [this ^String session]
(if-let [^AtomicOutputStream os (.get (:blob-uploaders nimbus) session)]
(do
(.close os)
(log-message "Finished uploading blob for session "
session
". Closing session.")
(.remove (:blob-uploaders nimbus) session))
(throw-runtime "Blob for session "
session
" does not exist (or timed out)")))
(^void cancelBlobUpload [this ^String session]
(if-let [^AtomicOutputStream os (.get (:blob-uploaders nimbus) session)]
(do
(.cancel os)
(log-message "Canceled uploading blob for session "
session
". Closing session.")
(.remove (:blob-uploaders nimbus) session))
(throw-runtime "Blob for session "
session
" does not exist (or timed out)")))
(^ReadableBlobMeta getBlobMeta [this ^String blob-key]
(let [^ReadableBlobMeta ret (.getBlobMeta (:blob-store nimbus)
blob-key (get-subject))]
ret))
(^void setBlobMeta [this ^String blob-key ^SettableBlobMeta blob-meta]
(->> (ReqContext/context)
(.subject)
(.setBlobMeta (:blob-store nimbus) blob-key blob-meta)))
(^BeginDownloadResult beginBlobDownload [this ^String blob-key]
(let [^InputStreamWithMeta is (.getBlob (:blob-store nimbus)
blob-key (get-subject))]
(let [session-id (uuid)
ret (BeginDownloadResult. (.getVersion is) (str session-id))]
(.set_data_size ret (.getFileLength is))
(.put (:blob-downloaders nimbus) session-id (BufferInputStream. is (Utils/getInt (conf STORM-BLOBSTORE-INPUTSTREAM-BUFFER-SIZE-BYTES) (int 65536))))
(log-message "Created download session for " blob-key
" with id " session-id)
ret)))
(^ByteBuffer downloadBlobChunk [this ^String session]
(let [downloaders (:blob-downloaders nimbus)
^BufferInputStream is (.get downloaders session)]
(when-not is
(throw (RuntimeException.
"Could not find input stream for session " session)))
(let [ret (.read is)]
(.put downloaders session is)
(when (empty? ret)
(.close is)
(.remove downloaders session))
(log-debug "Sending " (alength ret) " bytes")
(ByteBuffer/wrap ret))))
(^void deleteBlob [this ^String blob-key]
(let [subject (->> (ReqContext/context)
(.subject))]
(.deleteBlob (:blob-store nimbus) blob-key subject)
(when (instance? LocalFsBlobStore blob-store)
(.remove-blobstore-key! (:storm-cluster-state nimbus) blob-key)
(.remove-key-version! (:storm-cluster-state nimbus) blob-key))
(log-message "Deleted blob for key " blob-key)))
(^ListBlobsResult listBlobs [this ^String session]
(let [listers (:blob-listers nimbus)
^Iterator keys-it (if (clojure.string/blank? session)
(.listKeys (:blob-store nimbus))
(.get listers session))
_ (or keys-it (throw-runtime "Blob list for session "
session
" does not exist (or timed out)"))
;; Create a new session id if the user gave an empty session string.
;; This is the use case when the user wishes to list blobs
;; starting from the beginning.
session (if (clojure.string/blank? session)
(let [new-session (uuid)]
(log-message "Creating new session for downloading list " new-session)
new-session)
session)]
(if-not (.hasNext keys-it)
(do
(.remove listers session)
(log-message "No more blobs to list for session " session)
;; A blank result communicates that there are no more blobs.
(ListBlobsResult. (ArrayList. 0) (str session)))
(let [^List list-chunk (->> keys-it
(iterator-seq)
(take 100) ;; Limit to next 100 keys
(ArrayList.))]
(log-message session " downloading " (.size list-chunk) " entries")
(.put listers session keys-it)
(ListBlobsResult. list-chunk (str session))))))
(^int getBlobReplication [this ^String blob-key]
(->> (ReqContext/context)
(.subject)
(.getBlobReplication (:blob-store nimbus) blob-key)))
(^int updateBlobReplication [this ^String blob-key ^int replication]
(->> (ReqContext/context)
(.subject)
(.updateBlobReplication (:blob-store nimbus) blob-key replication)))
(^TopologyPageInfo getTopologyPageInfo
[this ^String topo-id ^String window ^boolean include-sys?]
(mark! nimbus:num-getTopologyPageInfo-calls)
(let [info (get-common-topo-info topo-id "getTopologyPageInfo")
exec->node+port (:executor->node+port (:assignment info))
last-err-fn (partial get-last-error
(:storm-cluster-state info)
topo-id)
topo-page-info (stats/agg-topo-execs-stats topo-id
exec->node+port
(:task->component info)
(:beats info)
(:topology info)
window
include-sys?
last-err-fn)]
(when-let [owner (:owner (:base info))]
(.set_owner topo-page-info owner))
(when-let [sched-status (.get @(:id->sched-status nimbus) topo-id)]
(.set_sched_status topo-page-info sched-status))
(when-let [resources (.get @(:id->resources nimbus) topo-id)]
(.set_requested_memonheap topo-page-info (get resources 0))
(.set_requested_memoffheap topo-page-info (get resources 1))
(.set_requested_cpu topo-page-info (get resources 2))
(.set_assigned_memonheap topo-page-info (get resources 3))
(.set_assigned_memoffheap topo-page-info (get resources 4))
(.set_assigned_cpu topo-page-info (get resources 5)))
(doto topo-page-info
(.set_name (:storm-name info))
(.set_status (extract-status-str (:base info)))
(.set_uptime_secs (time-delta (:launch-time-secs info)))
(.set_topology_conf (to-json (try-read-storm-conf conf
topo-id (:blob-store nimbus))))
(.set_replication_count (get-blob-replication-count (master-stormcode-key topo-id) nimbus)))
(when-let [debug-options
(get-in info [:base :component->debug topo-id])]
(.set_debug_options
topo-page-info
(converter/thriftify-debugoptions debug-options)))
topo-page-info))
(^ComponentPageInfo getComponentPageInfo
[this
^String topo-id
^String component-id
^String window
^boolean include-sys?]
(mark! nimbus:num-getComponentPageInfo-calls)
(let [info (get-common-topo-info topo-id "getComponentPageInfo")
{:keys [executor->node+port node->host]} (:assignment info)
executor->host+port (map-val (fn [[node port]]
[(node->host node) port])
executor->node+port)
comp-page-info (stats/agg-comp-execs-stats executor->host+port
(:task->component info)
(:beats info)
window
include-sys?
topo-id
(:topology info)
component-id)]
(doto comp-page-info
(.set_topology_name (:storm-name info))
(.set_errors (get-errors (:storm-cluster-state info)
topo-id
component-id))
(.set_topology_status (extract-status-str (:base info))))
(when-let [debug-options
(get-in info [:base :component->debug component-id])]
(.set_debug_options
comp-page-info
(converter/thriftify-debugoptions debug-options)))
;; Add the event logger details
(let [component->tasks (reverse-map (:task->component info))]
(if (contains? component->tasks EVENTLOGGER-COMPONENT-ID)
(let [eventlogger-tasks (sort (get component->tasks
EVENTLOGGER-COMPONENT-ID))
;; Find the task the events from this component route to.
task-index (mod (TupleUtils/listHashCode [component-id])
(count eventlogger-tasks))
task-id (nth eventlogger-tasks task-index)
eventlogger-exec (first (filter (fn [[start stop]]
(between? task-id start stop))
(keys executor->host+port)))
[host port] (get executor->host+port eventlogger-exec)]
(if (and host port)
(doto comp-page-info
(.set_eventlog_host host)
(.set_eventlog_port port))))))
comp-page-info))
(^TopologyHistoryInfo getTopologyHistory [this ^String user]
(let [storm-cluster-state (:storm-cluster-state nimbus)
bases (topology-bases storm-cluster-state)
assigned-topology-ids (.assignments storm-cluster-state nil)
user-group-match-fn (fn [topo-id user conf]
(let [topology-conf (try-read-storm-conf conf topo-id (:blob-store nimbus))
groups (get-topo-logs-groups topology-conf)]
(or (nil? user)
(some #(= % user) admin-users)
(does-users-group-intersect? user groups conf)
(some #(= % user) (get-topo-logs-users topology-conf)))))
active-ids-for-user (filter #(user-group-match-fn % user (:conf nimbus)) assigned-topology-ids)
topo-history-list (read-topology-history nimbus user admin-users)]
(TopologyHistoryInfo. (distinct (concat active-ids-for-user topo-history-list)))))
Shutdownable
(shutdown [this]
(mark! nimbus:num-shutdown-calls)
(log-message "Shutting down master")
(cancel-timer (:timer nimbus))
(.disconnect (:storm-cluster-state nimbus))
(.cleanup (:downloaders nimbus))
(.cleanup (:uploaders nimbus))
(.shutdown (:blob-store nimbus))
(.close (:leader-elector nimbus))
(when (:nimbus-topology-action-notifier nimbus) (.cleanup (:nimbus-topology-action-notifier nimbus)))
(log-message "Shut down master"))
DaemonCommon
(waiting? [this]
(timer-waiting? (:timer nimbus))))))
(defn validate-port-available[conf]
(try
(let [socket (ServerSocket. (conf NIMBUS-THRIFT-PORT))]
(.close socket))
(catch BindException e
(log-error e (conf NIMBUS-THRIFT-PORT) " is not available. Check if another process is already listening on " (conf NIMBUS-THRIFT-PORT))
(System/exit 0))))
(defn launch-server! [conf nimbus]
(validate-distributed-mode! conf)
(validate-port-available conf)
(let [service-handler (service-handler conf nimbus)
server (ThriftServer. conf (Nimbus$Processor. service-handler)
ThriftConnectionType/NIMBUS)]
(add-shutdown-hook-with-force-kill-in-1-sec (fn []
(.shutdown service-handler)
(.stop server)))
(log-message "Starting nimbus server for storm version '"
STORM-VERSION
"'")
(.serve server)
service-handler))
;; distributed implementation
(defmethod setup-jar :distributed [conf tmp-jar-location stormroot]
(let [src-file (File. tmp-jar-location)]
(if-not (.exists src-file)
(throw
(IllegalArgumentException.
(str tmp-jar-location " to copy to " stormroot " does not exist!"))))
(FileUtils/copyFile src-file (File. (master-stormjar-path stormroot)))
))
;; local implementation
(defmethod setup-jar :local [conf & args]
nil
)
(defn -launch [nimbus]
(let [conf (merge
(read-storm-config)
(read-yaml-config "storm-cluster-auth.yaml" false))]
(launch-server! conf nimbus)))
(defn standalone-nimbus []
(reify INimbus
(prepare [this conf local-dir]
)
(allSlotsAvailableForScheduling [this supervisors topologies topologies-missing-assignments]
(->> supervisors
(mapcat (fn [^SupervisorDetails s]
(for [p (.getMeta s)]
(WorkerSlot. (.getId s) p))))
set ))
(assignSlots [this topology slots]
)
(getForcedScheduler [this]
nil )
(getHostName [this supervisors node-id]
(if-let [^SupervisorDetails supervisor (get supervisors node-id)]
(.getHost supervisor)))
))
(defn -main []
(setup-default-uncaught-exception-handler)
(-launch (standalone-nimbus)))