| package org.apache.solr.cloud; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.net.InetAddress; |
| import java.net.NetworkInterface; |
| import java.net.URLEncoder; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.solr.client.solrj.impl.HttpSolrServer; |
| import org.apache.solr.client.solrj.request.CoreAdminRequest.WaitForState; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| import org.apache.solr.common.cloud.BeforeReconnect; |
| import org.apache.solr.common.cloud.ClusterState; |
| import org.apache.solr.common.cloud.ClusterStateUtil; |
| import org.apache.solr.common.cloud.DefaultConnectionStrategy; |
| import org.apache.solr.common.cloud.DefaultZkACLProvider; |
| import org.apache.solr.common.cloud.DefaultZkCredentialsProvider; |
| import org.apache.solr.common.cloud.DocCollection; |
| import org.apache.solr.common.cloud.OnReconnect; |
| import org.apache.solr.common.cloud.Replica; |
| import org.apache.solr.common.cloud.Slice; |
| import org.apache.solr.common.cloud.SolrZkClient; |
| import org.apache.solr.common.cloud.ZkACLProvider; |
| import org.apache.solr.common.cloud.ZkCmdExecutor; |
| import org.apache.solr.common.cloud.ZkCoreNodeProps; |
| import org.apache.solr.common.cloud.ZkCredentialsProvider; |
| import org.apache.solr.common.cloud.ZkNodeProps; |
| import org.apache.solr.common.cloud.ZkStateReader; |
| import org.apache.solr.common.cloud.ZooKeeperException; |
| import org.apache.solr.common.params.CollectionParams; |
| import org.apache.solr.common.params.SolrParams; |
| import org.apache.solr.common.util.URLUtil; |
| import org.apache.solr.core.CoreContainer; |
| import org.apache.solr.core.CoreDescriptor; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.handler.component.ShardHandler; |
| import org.apache.solr.update.UpdateLog; |
| import org.apache.solr.update.UpdateShardHandler; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.KeeperException.ConnectionLossException; |
| import org.apache.zookeeper.KeeperException.NoNodeException; |
| import org.apache.zookeeper.KeeperException.SessionExpiredException; |
| import org.apache.zookeeper.data.Stat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Handle ZooKeeper interactions. |
| * |
| * notes: loads everything on init, creates what's not there - further updates |
| * are prompted with Watches. |
| * |
| * TODO: exceptions during shutdown on attempts to update cloud state |
| * |
| */ |
| public final class ZkController { |
| |
| private static Logger log = LoggerFactory.getLogger(ZkController.class); |
| |
| static final String NEWL = System.getProperty("line.separator"); |
| |
| private final boolean SKIP_AUTO_RECOVERY = Boolean.getBoolean("solrcloud.skip.autorecovery"); |
| |
| private final DistributedQueue overseerJobQueue; |
| private final DistributedQueue overseerCollectionQueue; |
| |
| private final DistributedMap overseerRunningMap; |
| private final DistributedMap overseerCompletedMap; |
| private final DistributedMap overseerFailureMap; |
| |
| public static final String CONFIGS_ZKNODE = "/configs"; |
| |
| public final static String COLLECTION_PARAM_PREFIX="collection."; |
| public final static String CONFIGNAME_PROP="configName"; |
| |
| static class ContextKey { |
| |
| private String collection; |
| private String coreNodeName; |
| |
| public ContextKey(String collection, String coreNodeName) { |
| this.collection = collection; |
| this.coreNodeName = coreNodeName; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result |
| + ((collection == null) ? 0 : collection.hashCode()); |
| result = prime * result |
| + ((coreNodeName == null) ? 0 : coreNodeName.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) return true; |
| if (obj == null) return false; |
| if (getClass() != obj.getClass()) return false; |
| ContextKey other = (ContextKey) obj; |
| if (collection == null) { |
| if (other.collection != null) return false; |
| } else if (!collection.equals(other.collection)) return false; |
| if (coreNodeName == null) { |
| if (other.coreNodeName != null) return false; |
| } else if (!coreNodeName.equals(other.coreNodeName)) return false; |
| return true; |
| } |
| } |
| private final Map<ContextKey, ElectionContext> electionContexts = Collections.synchronizedMap(new HashMap<ContextKey, ElectionContext>()); |
| |
| private final SolrZkClient zkClient; |
| private final ZkCmdExecutor cmdExecutor; |
| private final ZkStateReader zkStateReader; |
| |
| private final LeaderElector leaderElector; |
| |
| private final String zkServerAddress; // example: 127.0.0.1:54062/solr |
| |
| private final String localHostPort; // example: 54065 |
| private final String localHostContext; // example: solr |
| private final String hostName; // example: 127.0.0.1 |
| private final String nodeName; // example: 127.0.0.1:54065_solr |
| private final String baseURL; // example: http://127.0.0.1:54065/solr |
| |
| |
| private LeaderElector overseerElector; |
| |
| |
| // for now, this can be null in tests, in which case recovery will be inactive, and other features |
| // may accept defaults or use mocks rather than pulling things from a CoreContainer |
| private CoreContainer cc; |
| |
| protected volatile Overseer overseer; |
| |
| private int leaderVoteWait; |
| private int leaderConflictResolveWait; |
| |
| private boolean genericCoreNodeNames; |
| |
| private int clientTimeout; |
| |
| private volatile boolean isClosed; |
| |
| // keeps track of replicas that have been asked to recover by leaders running on this node |
| private Map<String,String> replicasInLeaderInitiatedRecovery = new HashMap<String,String>(); |
| |
| // This is an expert and unsupported development mode that does not create |
| // an Overseer or register a /live node. This let's you monitor the cluster |
| // and interact with zookeeper via the Solr admin UI on a node outside the cluster, |
| // and so one that will not be killed or stopped when testing. See developer cloud-scripts. |
| private boolean zkRunOnly = Boolean.getBoolean("zkRunOnly"); // expert |
| |
| public ZkController(final CoreContainer cc, String zkServerAddress, int zkClientTimeout, int zkClientConnectTimeout, String localHost, String locaHostPort, |
| String localHostContext, int leaderVoteWait, int leaderConflictResolveWait, boolean genericCoreNodeNames, final CurrentCoreDescriptorProvider registerOnReconnect) |
| throws InterruptedException, TimeoutException, IOException |
| { |
| |
| if (cc == null) throw new IllegalArgumentException("CoreContainer cannot be null."); |
| this.cc = cc; |
| this.genericCoreNodeNames = genericCoreNodeNames; |
| // be forgiving and strip this off leading/trailing slashes |
| // this allows us to support users specifying hostContext="/" in |
| // solr.xml to indicate the root context, instead of hostContext="" |
| // which means the default of "solr" |
| localHostContext = trimLeadingAndTrailingSlashes(localHostContext); |
| |
| this.zkServerAddress = zkServerAddress; |
| this.localHostPort = locaHostPort; |
| this.localHostContext = localHostContext; |
| this.hostName = normalizeHostName(localHost); |
| this.nodeName = generateNodeName(this.hostName, |
| this.localHostPort, |
| this.localHostContext); |
| |
| this.leaderVoteWait = leaderVoteWait; |
| this.leaderConflictResolveWait = leaderConflictResolveWait; |
| |
| this.clientTimeout = zkClientTimeout; |
| DefaultConnectionStrategy strat = new DefaultConnectionStrategy(); |
| String zkACLProviderClass = cc.getConfig().getZkACLProviderClass(); |
| ZkACLProvider zkACLProvider = null; |
| if (zkACLProviderClass != null && zkACLProviderClass.trim().length() > 0) { |
| zkACLProvider = cc.getResourceLoader().newInstance(zkACLProviderClass, ZkACLProvider.class); |
| } else { |
| zkACLProvider = new DefaultZkACLProvider(); |
| } |
| |
| String zkCredentialProviderClass = cc.getConfig().getZkCredentialProviderClass(); |
| if (zkCredentialProviderClass != null && zkCredentialProviderClass.trim().length() > 0) { |
| strat.setZkCredentialsToAddAutomatically(cc.getResourceLoader().newInstance(zkCredentialProviderClass, ZkCredentialsProvider.class)); |
| } else { |
| strat.setZkCredentialsToAddAutomatically(new DefaultZkCredentialsProvider()); |
| } |
| |
| zkClient = new SolrZkClient(zkServerAddress, zkClientTimeout, |
| zkClientConnectTimeout, strat, |
| // on reconnect, reload cloud info |
| new OnReconnect() { |
| |
| @Override |
| public void command() { |
| try { |
| |
| // this is troublesome - we dont want to kill anything the old |
| // leader accepted |
| // though I guess sync will likely get those updates back? But |
| // only if |
| // he is involved in the sync, and he certainly may not be |
| // ExecutorUtil.shutdownAndAwaitTermination(cc.getCmdDistribExecutor()); |
| // we need to create all of our lost watches |
| |
| // seems we dont need to do this again... |
| // Overseer.createClientNodes(zkClient, getNodeName()); |
| |
| cc.cancelCoreRecoveries(); |
| |
| registerAllCoresAsDown(registerOnReconnect, false); |
| |
| if (!zkRunOnly) { |
| ElectionContext context = new OverseerElectionContext(zkClient, |
| overseer, getNodeName()); |
| |
| ElectionContext prevContext = overseerElector.getContext(); |
| if (prevContext != null) { |
| prevContext.cancelElection(); |
| } |
| |
| overseerElector.setup(context); |
| overseerElector.joinElection(context, true); |
| } |
| |
| zkStateReader.createClusterStateWatchersAndUpdate(); |
| |
| // we have to register as live first to pick up docs in the buffer |
| createEphemeralLiveNode(); |
| |
| List<CoreDescriptor> descriptors = registerOnReconnect |
| .getCurrentDescriptors(); |
| // re register all descriptors |
| if (descriptors != null) { |
| for (CoreDescriptor descriptor : descriptors) { |
| // TODO: we need to think carefully about what happens when it |
| // was |
| // a leader that was expired - as well as what to do about |
| // leaders/overseers |
| // with connection loss |
| try { |
| // unload solrcores that have been 'failed over' |
| throwErrorIfReplicaReplaced(descriptor); |
| |
| register(descriptor.getName(), descriptor, true, true); |
| } catch (Exception e) { |
| SolrException.log(log, "Error registering SolrCore", e); |
| } |
| } |
| } |
| |
| } catch (InterruptedException e) { |
| // Restore the interrupted status |
| Thread.currentThread().interrupt(); |
| throw new ZooKeeperException( |
| SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } catch (Exception e) { |
| SolrException.log(log, "", e); |
| throw new ZooKeeperException( |
| SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } |
| } |
| |
| }, new BeforeReconnect() { |
| |
| @Override |
| public void command() { |
| try { |
| ZkController.this.overseer.close(); |
| } catch (Exception e) { |
| log.error("Error trying to stop any Overseer threads", e); |
| } |
| markAllAsNotLeader(registerOnReconnect); |
| } |
| }, zkACLProvider); |
| |
| this.overseerJobQueue = Overseer.getInQueue(zkClient); |
| this.overseerCollectionQueue = Overseer.getCollectionQueue(zkClient); |
| this.overseerRunningMap = Overseer.getRunningMap(zkClient); |
| this.overseerCompletedMap = Overseer.getCompletedMap(zkClient); |
| this.overseerFailureMap = Overseer.getFailureMap(zkClient); |
| cmdExecutor = new ZkCmdExecutor(zkClientTimeout); |
| leaderElector = new LeaderElector(zkClient); |
| zkStateReader = new ZkStateReader(zkClient); |
| |
| this.baseURL = zkStateReader.getBaseUrlForNodeName(this.nodeName); |
| |
| init(registerOnReconnect); |
| } |
| |
| public int getLeaderVoteWait() { |
| return leaderVoteWait; |
| } |
| |
| public int getLeaderConflictResolveWait() { |
| return leaderConflictResolveWait; |
| } |
| |
| private void registerAllCoresAsDown( |
| final CurrentCoreDescriptorProvider registerOnReconnect, boolean updateLastPublished) { |
| List<CoreDescriptor> descriptors = registerOnReconnect |
| .getCurrentDescriptors(); |
| if (isClosed) return; |
| if (descriptors != null) { |
| // before registering as live, make sure everyone is in a |
| // down state |
| for (CoreDescriptor descriptor : descriptors) { |
| try { |
| descriptor.getCloudDescriptor().setLeader(false); |
| publish(descriptor, ZkStateReader.DOWN, updateLastPublished); |
| } catch (Exception e) { |
| if (isClosed) { |
| return; |
| } |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } |
| try { |
| publish(descriptor, ZkStateReader.DOWN); |
| } catch (Exception e2) { |
| SolrException.log(log, "", e2); |
| continue; |
| } |
| } |
| } |
| |
| for (CoreDescriptor descriptor : descriptors) { |
| // if it looks like we are going to be the leader, we don't |
| // want to wait for the following stuff |
| CloudDescriptor cloudDesc = descriptor.getCloudDescriptor(); |
| String collection = cloudDesc.getCollectionName(); |
| String slice = cloudDesc.getShardId(); |
| try { |
| |
| int children = zkStateReader |
| .getZkClient() |
| .getChildren( |
| ZkStateReader.COLLECTIONS_ZKNODE + "/" + collection |
| + "/leader_elect/" + slice + "/election", null, true).size(); |
| if (children == 0) { |
| log.debug("looks like we are going to be the leader for collection {} shard {}", collection, slice); |
| continue; |
| } |
| |
| } catch (NoNodeException e) { |
| log.debug("looks like we are going to be the leader for collection {} shard {}", collection, slice); |
| continue; |
| } catch (InterruptedException e2) { |
| Thread.currentThread().interrupt(); |
| } catch (KeeperException e) { |
| log.warn("", e); |
| Thread.currentThread().interrupt(); |
| } |
| |
| final String coreZkNodeName = descriptor.getCloudDescriptor().getCoreNodeName(); |
| try { |
| log.debug("calling waitForLeaderToSeeDownState for coreZkNodeName={} collection={} shard={}", new Object[] {coreZkNodeName, collection, slice}); |
| waitForLeaderToSeeDownState(descriptor, coreZkNodeName); |
| } catch (Exception e) { |
| SolrException.log(log, "", e); |
| if (isClosed) { |
| return; |
| } |
| try { |
| Thread.sleep(5000); |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| } |
| } |
| |
| private void markAllAsNotLeader( |
| final CurrentCoreDescriptorProvider registerOnReconnect) { |
| List<CoreDescriptor> descriptors = registerOnReconnect |
| .getCurrentDescriptors(); |
| if (descriptors != null) { |
| for (CoreDescriptor descriptor : descriptors) { |
| descriptor.getCloudDescriptor().setLeader(false); |
| } |
| } |
| } |
| |
| /** |
| * Closes the underlying ZooKeeper client. |
| */ |
| public void close() { |
| this.isClosed = true; |
| try { |
| for (ElectionContext context : electionContexts.values()) { |
| try { |
| context.close(); |
| } catch (Exception e) { |
| log.error("Error closing overseer", e); |
| } |
| } |
| } finally { |
| try { |
| try { |
| overseer.close(); |
| } catch (Exception e) { |
| log.error("Error closing overseer", e); |
| } |
| } finally { |
| try { |
| try { |
| zkStateReader.close(); |
| } catch (Exception e) { |
| log.error("Error closing zkStateReader", e); |
| } |
| } finally { |
| try { |
| zkClient.close(); |
| } catch (Exception e) { |
| log.error("Error closing zkClient", e); |
| } |
| } |
| } |
| } |
| |
| } |
| |
| /** |
| * Returns true if config file exists |
| */ |
| public boolean configFileExists(String collection, String fileName) |
| throws KeeperException, InterruptedException { |
| Stat stat = zkClient.exists(CONFIGS_ZKNODE + "/" + collection + "/" + fileName, null, true); |
| return stat != null; |
| } |
| |
| /** |
| * @return information about the cluster from ZooKeeper |
| */ |
| public ClusterState getClusterState() { |
| return zkStateReader.getClusterState(); |
| } |
| |
| /** |
| * Returns config file data (in bytes) |
| */ |
| public byte[] getConfigFileData(String zkConfigName, String fileName) |
| throws KeeperException, InterruptedException { |
| String zkPath = CONFIGS_ZKNODE + "/" + zkConfigName + "/" + fileName; |
| byte[] bytes = zkClient.getData(zkPath, null, null, true); |
| if (bytes == null) { |
| log.error("Config file contains no data:" + zkPath); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, |
| "Config file contains no data:" + zkPath); |
| } |
| |
| return bytes; |
| } |
| |
| // normalize host removing any url scheme. |
| // input can be null, host, or url_prefix://host |
| private String normalizeHostName(String host) throws IOException { |
| |
| if (host == null || host.length() == 0) { |
| String hostaddress; |
| try { |
| hostaddress = InetAddress.getLocalHost().getHostAddress(); |
| } catch (UnknownHostException e) { |
| hostaddress = "127.0.0.1"; // cannot resolve system hostname, fall through |
| } |
| // Re-get the IP again for "127.0.0.1", the other case we trust the hosts |
| // file is right. |
| if ("127.0.0.1".equals(hostaddress)) { |
| Enumeration<NetworkInterface> netInterfaces = null; |
| try { |
| netInterfaces = NetworkInterface.getNetworkInterfaces(); |
| while (netInterfaces.hasMoreElements()) { |
| NetworkInterface ni = netInterfaces.nextElement(); |
| Enumeration<InetAddress> ips = ni.getInetAddresses(); |
| while (ips.hasMoreElements()) { |
| InetAddress ip = ips.nextElement(); |
| if (ip.isSiteLocalAddress()) { |
| hostaddress = ip.getHostAddress(); |
| } |
| } |
| } |
| } catch (Exception e) { |
| SolrException.log(log, |
| "Error while looking for a better host name than 127.0.0.1", e); |
| } |
| } |
| host = hostaddress; |
| } else { |
| if(URLUtil.hasScheme(host)) { |
| host = URLUtil.removeScheme(host); |
| } |
| } |
| |
| return host; |
| } |
| |
| public String getHostName() { |
| return hostName; |
| } |
| |
| public String getHostPort() { |
| return localHostPort; |
| } |
| |
| public SolrZkClient getZkClient() { |
| return zkClient; |
| } |
| |
| /** |
| * @return zookeeper server address |
| */ |
| public String getZkServerAddress() { |
| return zkServerAddress; |
| } |
| |
| private void init(CurrentCoreDescriptorProvider registerOnReconnect) { |
| |
| try { |
| boolean createdWatchesAndUpdated = false; |
| if (zkClient.exists(ZkStateReader.LIVE_NODES_ZKNODE, true)) { |
| zkStateReader.createClusterStateWatchersAndUpdate(); |
| createdWatchesAndUpdated = true; |
| publishAndWaitForDownStates(); |
| } |
| |
| // makes nodes zkNode |
| cmdExecutor.ensureExists(ZkStateReader.LIVE_NODES_ZKNODE, zkClient); |
| |
| createEphemeralLiveNode(); |
| cmdExecutor.ensureExists(ZkStateReader.COLLECTIONS_ZKNODE, zkClient); |
| |
| ShardHandler shardHandler; |
| UpdateShardHandler updateShardHandler; |
| String adminPath; |
| shardHandler = cc.getShardHandlerFactory().getShardHandler(); |
| updateShardHandler = cc.getUpdateShardHandler(); |
| adminPath = cc.getAdminPath(); |
| |
| if (!zkRunOnly) { |
| overseerElector = new LeaderElector(zkClient); |
| this.overseer = new Overseer(shardHandler, updateShardHandler, |
| adminPath, zkStateReader, this, cc.getConfig()); |
| ElectionContext context = new OverseerElectionContext(zkClient, |
| overseer, getNodeName()); |
| overseerElector.setup(context); |
| overseerElector.joinElection(context, false); |
| } |
| |
| if (!createdWatchesAndUpdated) { |
| zkStateReader.createClusterStateWatchersAndUpdate(); |
| } |
| |
| } catch (IOException e) { |
| log.error("", e); |
| throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, |
| "Can't create ZooKeeperController", e); |
| } catch (InterruptedException e) { |
| // Restore the interrupted status |
| Thread.currentThread().interrupt(); |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, |
| "", e); |
| } catch (KeeperException e) { |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, |
| "", e); |
| } |
| |
| } |
| |
| public void publishAndWaitForDownStates() throws KeeperException, |
| InterruptedException { |
| |
| ClusterState clusterState = zkStateReader.getClusterState(); |
| Set<String> collections = clusterState.getCollections(); |
| List<String> updatedNodes = new ArrayList<>(); |
| for (String collectionName : collections) { |
| DocCollection collection = clusterState.getCollection(collectionName); |
| Collection<Slice> slices = collection.getSlices(); |
| for (Slice slice : slices) { |
| Collection<Replica> replicas = slice.getReplicas(); |
| for (Replica replica : replicas) { |
| if (getNodeName().equals(replica.getNodeName()) |
| && !(replica.getStr(ZkStateReader.STATE_PROP) |
| .equals(ZkStateReader.DOWN))) { |
| ZkNodeProps m = new ZkNodeProps(Overseer.QUEUE_OPERATION, "state", |
| ZkStateReader.STATE_PROP, ZkStateReader.DOWN, |
| ZkStateReader.BASE_URL_PROP, getBaseUrl(), |
| ZkStateReader.CORE_NAME_PROP, |
| replica.getStr(ZkStateReader.CORE_NAME_PROP), |
| ZkStateReader.ROLES_PROP, |
| replica.getStr(ZkStateReader.ROLES_PROP), |
| ZkStateReader.NODE_NAME_PROP, getNodeName(), |
| ZkStateReader.SHARD_ID_PROP, |
| replica.getStr(ZkStateReader.SHARD_ID_PROP), |
| ZkStateReader.COLLECTION_PROP, collectionName, |
| ZkStateReader.CORE_NODE_NAME_PROP, replica.getName()); |
| updatedNodes.add(replica.getStr(ZkStateReader.CORE_NAME_PROP)); |
| overseerJobQueue.offer(ZkStateReader.toJSON(m)); |
| } |
| } |
| } |
| } |
| |
| // now wait till the updates are in our state |
| long now = System.nanoTime(); |
| long timeout = now + TimeUnit.NANOSECONDS.convert(60, TimeUnit.SECONDS); |
| boolean foundStates = false; |
| while (System.nanoTime() < timeout) { |
| clusterState = zkStateReader.getClusterState(); |
| collections = clusterState.getCollections(); |
| for (String collectionName : collections) { |
| DocCollection collection = clusterState.getCollection(collectionName); |
| Collection<Slice> slices = collection.getSlices(); |
| for (Slice slice : slices) { |
| Collection<Replica> replicas = slice.getReplicas(); |
| for (Replica replica : replicas) { |
| if (replica.getStr(ZkStateReader.STATE_PROP).equals( |
| ZkStateReader.DOWN)) { |
| updatedNodes.remove(replica.getStr(ZkStateReader.CORE_NAME_PROP)); |
| |
| } |
| } |
| } |
| } |
| |
| if (updatedNodes.size() == 0) { |
| foundStates = true; |
| Thread.sleep(1000); |
| break; |
| } |
| Thread.sleep(1000); |
| } |
| if (!foundStates) { |
| log.warn("Timed out waiting to see all nodes published as DOWN in our cluster state."); |
| } |
| |
| } |
| |
| /** |
| * Validates if the chroot exists in zk (or if it is successfully created). |
| * Optionally, if create is set to true this method will create the path in |
| * case it doesn't exist |
| * |
| * @return true if the path exists or is created false if the path doesn't |
| * exist and 'create' = false |
| */ |
| public static boolean checkChrootPath(String zkHost, boolean create) |
| throws KeeperException, InterruptedException { |
| if (!SolrZkClient.containsChroot(zkHost)) { |
| return true; |
| } |
| log.info("zkHost includes chroot"); |
| String chrootPath = zkHost.substring(zkHost.indexOf("/"), zkHost.length()); |
| |
| SolrZkClient tmpClient = new SolrZkClient(zkHost.substring(0, |
| zkHost.indexOf("/")), 60000, 30000, null, null, null); |
| boolean exists = tmpClient.exists(chrootPath, true); |
| if (!exists && create) { |
| tmpClient.makePath(chrootPath, false, true); |
| exists = true; |
| } |
| tmpClient.close(); |
| return exists; |
| } |
| |
| public boolean isConnected() { |
| return zkClient.isConnected(); |
| } |
| |
| private void createEphemeralLiveNode() throws KeeperException, |
| InterruptedException { |
| if (zkRunOnly) { |
| return; |
| } |
| String nodeName = getNodeName(); |
| String nodePath = ZkStateReader.LIVE_NODES_ZKNODE + "/" + nodeName; |
| log.info("Register node as live in ZooKeeper:" + nodePath); |
| |
| try { |
| boolean nodeDeleted = true; |
| try { |
| // we attempt a delete in the case of a quick server bounce - |
| // if there was not a graceful shutdown, the node may exist |
| // until expiration timeout - so a node won't be created here because |
| // it exists, but eventually the node will be removed. So delete |
| // in case it exists and create a new node. |
| zkClient.delete(nodePath, -1, true); |
| } catch (KeeperException.NoNodeException e) { |
| // fine if there is nothing to delete |
| // TODO: annoying that ZK logs a warning on us |
| nodeDeleted = false; |
| } |
| if (nodeDeleted) { |
| log |
| .info("Found a previous node that still exists while trying to register a new live node " |
| + nodePath + " - removing existing node to create another."); |
| } |
| zkClient.makePath(nodePath, CreateMode.EPHEMERAL, true); |
| } catch (KeeperException e) { |
| // its okay if the node already exists |
| if (e.code() != KeeperException.Code.NODEEXISTS) { |
| throw e; |
| } |
| } |
| } |
| |
| public String getNodeName() { |
| return nodeName; |
| } |
| |
| /** |
| * Returns true if the path exists |
| */ |
| public boolean pathExists(String path) throws KeeperException, |
| InterruptedException { |
| return zkClient.exists(path, true); |
| } |
| |
| |
| /** |
| * Register shard with ZooKeeper. |
| * |
| * @return the shardId for the SolrCore |
| */ |
| public String register(String coreName, final CoreDescriptor desc) throws Exception { |
| return register(coreName, desc, false, false); |
| } |
| |
| |
| /** |
| * Register shard with ZooKeeper. |
| * |
| * @return the shardId for the SolrCore |
| */ |
| public String register(String coreName, final CoreDescriptor desc, boolean recoverReloadedCores, boolean afterExpiration) throws Exception { |
| // pre register has published our down state |
| |
| final String baseUrl = getBaseUrl(); |
| |
| final CloudDescriptor cloudDesc = desc.getCloudDescriptor(); |
| final String collection = cloudDesc.getCollectionName(); |
| |
| final String coreZkNodeName = desc.getCloudDescriptor().getCoreNodeName(); |
| assert coreZkNodeName != null : "we should have a coreNodeName by now"; |
| |
| String shardId = cloudDesc.getShardId(); |
| |
| Map<String,Object> props = new HashMap<>(); |
| // we only put a subset of props into the leader node |
| props.put(ZkStateReader.BASE_URL_PROP, baseUrl); |
| props.put(ZkStateReader.CORE_NAME_PROP, coreName); |
| props.put(ZkStateReader.NODE_NAME_PROP, getNodeName()); |
| |
| |
| if (log.isInfoEnabled()) { |
| log.info("Register replica - core:" + coreName + " address:" |
| + baseUrl + " collection:" + cloudDesc.getCollectionName() + " shard:" + shardId); |
| } |
| |
| ZkNodeProps leaderProps = new ZkNodeProps(props); |
| |
| try { |
| joinElection(desc, afterExpiration); |
| } catch (InterruptedException e) { |
| // Restore the interrupted status |
| Thread.currentThread().interrupt(); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } catch (KeeperException e) { |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } catch (IOException e) { |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } |
| |
| |
| // in this case, we want to wait for the leader as long as the leader might |
| // wait for a vote, at least - but also long enough that a large cluster has |
| // time to get its act together |
| String leaderUrl = getLeader(cloudDesc, leaderVoteWait + 600000); |
| |
| String ourUrl = ZkCoreNodeProps.getCoreUrl(baseUrl, coreName); |
| log.info("We are " + ourUrl + " and leader is " + leaderUrl); |
| boolean isLeader = leaderUrl.equals(ourUrl); |
| |
| try (SolrCore core = cc.getCore(desc.getName())) { |
| |
| // recover from local transaction log and wait for it to complete before |
| // going active |
| // TODO: should this be moved to another thread? To recoveryStrat? |
| // TODO: should this actually be done earlier, before (or as part of) |
| // leader election perhaps? |
| |
| UpdateLog ulog = core.getUpdateHandler().getUpdateLog(); |
| if (!core.isReloaded() && ulog != null) { |
| // disable recovery in case shard is in construction state (for shard splits) |
| Slice slice = getClusterState().getSlice(collection, shardId); |
| if (!Slice.CONSTRUCTION.equals(slice.getState()) || !isLeader) { |
| Future<UpdateLog.RecoveryInfo> recoveryFuture = core.getUpdateHandler() |
| .getUpdateLog().recoverFromLog(); |
| if (recoveryFuture != null) { |
| log.info("Replaying tlog for "+ourUrl+" during startup... NOTE: This can take a while."); |
| recoveryFuture.get(); // NOTE: this could potentially block for |
| // minutes or more! |
| // TODO: public as recovering in the mean time? |
| // TODO: in the future we could do peersync in parallel with recoverFromLog |
| } else { |
| log.info("No LogReplay needed for core=" + core.getName() + " baseURL=" + baseUrl); |
| } |
| } |
| boolean didRecovery = checkRecovery(coreName, desc, recoverReloadedCores, isLeader, cloudDesc, |
| collection, coreZkNodeName, shardId, leaderProps, core, cc); |
| if (!didRecovery) { |
| publish(desc, ZkStateReader.ACTIVE); |
| } |
| } |
| } |
| |
| // make sure we have an update cluster state right away |
| zkStateReader.updateClusterState(true); |
| return shardId; |
| } |
| |
| // timeoutms is the timeout for the first call to get the leader - there is then |
| // a longer wait to make sure that leader matches our local state |
| private String getLeader(final CloudDescriptor cloudDesc, int timeoutms) { |
| |
| String collection = cloudDesc.getCollectionName(); |
| String shardId = cloudDesc.getShardId(); |
| // rather than look in the cluster state file, we go straight to the zknodes |
| // here, because on cluster restart there could be stale leader info in the |
| // cluster state node that won't be updated for a moment |
| String leaderUrl; |
| try { |
| leaderUrl = getLeaderProps(collection, cloudDesc.getShardId(), timeoutms) |
| .getCoreUrl(); |
| |
| // now wait until our currently cloud state contains the latest leader |
| String clusterStateLeaderUrl = zkStateReader.getLeaderUrl(collection, |
| shardId, timeoutms * 2); // since we found it in zk, we are willing to |
| // wait a while to find it in state |
| int tries = 0; |
| final long msInSec = 1000L; |
| int maxTries = (int)Math.floor(leaderConflictResolveWait/msInSec); |
| while (!leaderUrl.equals(clusterStateLeaderUrl)) { |
| if (tries > maxTries) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "There is conflicting information about the leader of shard: " |
| + cloudDesc.getShardId() + " our state says:" |
| + clusterStateLeaderUrl + " but zookeeper says:" + leaderUrl); |
| } |
| tries++; |
| if (tries % 30 == 0) { |
| String warnMsg = String.format(Locale.ENGLISH, "Still seeing conflicting information about the leader " |
| + "of shard %s for collection %s after %d seconds; our state says %s, but ZooKeeper says %s", |
| cloudDesc.getShardId(), collection, tries, clusterStateLeaderUrl, leaderUrl); |
| log.warn(warnMsg); |
| } |
| Thread.sleep(msInSec); |
| clusterStateLeaderUrl = zkStateReader.getLeaderUrl(collection, shardId, |
| timeoutms); |
| leaderUrl = getLeaderProps(collection, cloudDesc.getShardId(), timeoutms) |
| .getCoreUrl(); |
| } |
| |
| } catch (Exception e) { |
| log.error("Error getting leader from zk", e); |
| throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, |
| "Error getting leader from zk for shard " + shardId, e); |
| } |
| return leaderUrl; |
| } |
| |
| /** |
| * Get leader props directly from zk nodes. |
| */ |
| public ZkCoreNodeProps getLeaderProps(final String collection, |
| final String slice, int timeoutms) throws InterruptedException { |
| return getLeaderProps(collection, slice, timeoutms, false); |
| } |
| |
| /** |
| * Get leader props directly from zk nodes. |
| * |
| * @return leader props |
| */ |
| public ZkCoreNodeProps getLeaderProps(final String collection, |
| final String slice, int timeoutms, boolean failImmediatelyOnExpiration) throws InterruptedException { |
| int iterCount = timeoutms / 1000; |
| Exception exp = null; |
| while (iterCount-- > 0) { |
| try { |
| byte[] data = zkClient.getData( |
| ZkStateReader.getShardLeadersPath(collection, slice), null, null, |
| true); |
| ZkCoreNodeProps leaderProps = new ZkCoreNodeProps( |
| ZkNodeProps.load(data)); |
| return leaderProps; |
| } catch (InterruptedException e) { |
| throw e; |
| } catch (SessionExpiredException e) { |
| if (failImmediatelyOnExpiration) { |
| throw new RuntimeException("Session has expired - could not get leader props", exp); |
| } |
| exp = e; |
| Thread.sleep(1000); |
| } catch (Exception e) { |
| exp = e; |
| Thread.sleep(1000); |
| } |
| if (cc.isShutDown()) { |
| throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, "CoreContainer is shutdown"); |
| } |
| } |
| throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, "Could not get leader props", exp); |
| } |
| |
| |
| private void joinElection(CoreDescriptor cd, boolean afterExpiration) throws InterruptedException, KeeperException, IOException { |
| // look for old context - if we find it, cancel it |
| String collection = cd.getCloudDescriptor().getCollectionName(); |
| final String coreNodeName = cd.getCloudDescriptor().getCoreNodeName(); |
| |
| ContextKey contextKey = new ContextKey(collection, coreNodeName); |
| |
| ElectionContext prevContext = electionContexts.get(contextKey); |
| |
| if (prevContext != null) { |
| prevContext.cancelElection(); |
| } |
| |
| String shardId = cd.getCloudDescriptor().getShardId(); |
| |
| Map<String,Object> props = new HashMap<>(); |
| // we only put a subset of props into the leader node |
| props.put(ZkStateReader.BASE_URL_PROP, getBaseUrl()); |
| props.put(ZkStateReader.CORE_NAME_PROP, cd.getName()); |
| props.put(ZkStateReader.NODE_NAME_PROP, getNodeName()); |
| |
| |
| ZkNodeProps ourProps = new ZkNodeProps(props); |
| |
| |
| ElectionContext context = new ShardLeaderElectionContext(leaderElector, shardId, |
| collection, coreNodeName, ourProps, this, cc); |
| |
| leaderElector.setup(context); |
| electionContexts.put(contextKey, context); |
| leaderElector.joinElection(context, false); |
| } |
| |
| |
| /** |
| * Returns whether or not a recovery was started |
| */ |
| private boolean checkRecovery(String coreName, final CoreDescriptor desc, |
| boolean recoverReloadedCores, final boolean isLeader, |
| final CloudDescriptor cloudDesc, final String collection, |
| final String shardZkNodeName, String shardId, ZkNodeProps leaderProps, |
| SolrCore core, CoreContainer cc) { |
| if (SKIP_AUTO_RECOVERY) { |
| log.warn("Skipping recovery according to sys prop solrcloud.skip.autorecovery"); |
| return false; |
| } |
| boolean doRecovery = true; |
| if (!isLeader) { |
| |
| if (core.isReloaded() && !recoverReloadedCores) { |
| doRecovery = false; |
| } |
| |
| if (doRecovery) { |
| log.info("Core needs to recover:" + core.getName()); |
| core.getUpdateHandler().getSolrCoreState().doRecovery(cc, core.getCoreDescriptor()); |
| return true; |
| } |
| |
| // see if the leader told us to recover |
| String lirState = getLeaderInitiatedRecoveryState(collection, shardId, |
| core.getCoreDescriptor().getCloudDescriptor().getCoreNodeName()); |
| if (ZkStateReader.DOWN.equals(lirState)) { |
| log.info("Leader marked core "+core.getName()+" down; starting recovery process"); |
| core.getUpdateHandler().getSolrCoreState().doRecovery(cc, core.getCoreDescriptor()); |
| return true; |
| } |
| } else { |
| log.info("I am the leader, no recovery necessary"); |
| } |
| |
| return false; |
| } |
| |
| |
| public String getBaseUrl() { |
| return baseURL; |
| } |
| |
| public void publish(final CoreDescriptor cd, final String state) throws KeeperException, InterruptedException { |
| publish(cd, state, true); |
| } |
| |
| public void publish(final CoreDescriptor cd, final String state, boolean updateLastState) throws KeeperException, InterruptedException { |
| publish(cd, state, true, false); |
| } |
| |
| /** |
| * Publish core state to overseer. |
| */ |
| public void publish(final CoreDescriptor cd, final String state, boolean updateLastState, boolean forcePublish) throws KeeperException, InterruptedException { |
| if (!forcePublish) { |
| try (SolrCore core = cc.getCore(cd.getName())) { |
| if (core == null || core.isClosed()) { |
| return; |
| } |
| } |
| } |
| String collection = cd.getCloudDescriptor().getCollectionName(); |
| log.info("publishing core={} state={} collection={}", cd.getName(), state, collection); |
| //System.out.println(Thread.currentThread().getStackTrace()[3]); |
| Integer numShards = cd.getCloudDescriptor().getNumShards(); |
| if (numShards == null) { //XXX sys prop hack |
| log.info("numShards not found on descriptor - reading it from system property"); |
| numShards = Integer.getInteger(ZkStateReader.NUM_SHARDS_PROP); |
| } |
| |
| assert collection != null && collection.length() > 0; |
| |
| String shardId = cd.getCloudDescriptor().getShardId(); |
| String coreNodeName = cd.getCloudDescriptor().getCoreNodeName(); |
| // If the leader initiated recovery, then verify that this replica has performed |
| // recovery as requested before becoming active; don't even look at lirState if going down |
| if (!ZkStateReader.DOWN.equals(state)) { |
| String lirState = getLeaderInitiatedRecoveryState(collection, shardId, coreNodeName); |
| if (lirState != null) { |
| if ("active".equals(state)) { |
| // trying to become active, so leader-initiated state must be recovering |
| if (ZkStateReader.RECOVERING.equals(lirState)) { |
| updateLeaderInitiatedRecoveryState(collection, shardId, coreNodeName, ZkStateReader.ACTIVE); |
| } else if (ZkStateReader.DOWN.equals(lirState)) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "Cannot publish state of core '"+cd.getName()+"' as active without recovering first!"); |
| } |
| } else if (ZkStateReader.RECOVERING.equals(state)) { |
| // if it is currently DOWN, then trying to enter into recovering state is good |
| if (ZkStateReader.DOWN.equals(lirState)) { |
| updateLeaderInitiatedRecoveryState(collection, shardId, coreNodeName, ZkStateReader.RECOVERING); |
| } |
| } |
| } |
| } |
| |
| Map<String, Object> props = new HashMap<String, Object>(); |
| props.put(Overseer.QUEUE_OPERATION, "state"); |
| props.put(ZkStateReader.STATE_PROP, state); |
| props.put(ZkStateReader.BASE_URL_PROP, getBaseUrl()); |
| props.put(ZkStateReader.CORE_NAME_PROP, cd.getName()); |
| props.put(ZkStateReader.ROLES_PROP, cd.getCloudDescriptor().getRoles()); |
| props.put(ZkStateReader.NODE_NAME_PROP, getNodeName()); |
| props.put(ZkStateReader.SHARD_ID_PROP, cd.getCloudDescriptor().getShardId()); |
| props.put(ZkStateReader.COLLECTION_PROP, collection); |
| if (numShards != null) { |
| props.put(ZkStateReader.NUM_SHARDS_PROP, numShards.toString()); |
| } |
| if (coreNodeName != null) { |
| props.put(ZkStateReader.CORE_NODE_NAME_PROP, coreNodeName); |
| } |
| |
| if (ClusterStateUtil.isAutoAddReplicas(getZkStateReader(), collection)) { |
| try (SolrCore core = cc.getCore(cd.getName())) { |
| if (core != null && core.getDirectoryFactory().isSharedStorage()) { |
| props.put("dataDir", core.getDataDir()); |
| UpdateLog ulog = core.getUpdateHandler().getUpdateLog(); |
| if (ulog != null) { |
| props.put("ulogDir", ulog.getLogDir()); |
| } |
| } |
| } |
| } |
| |
| ZkNodeProps m = new ZkNodeProps(props); |
| |
| if (updateLastState) { |
| cd.getCloudDescriptor().lastPublished = state; |
| } |
| overseerJobQueue.offer(ZkStateReader.toJSON(m)); |
| } |
| |
| private boolean needsToBeAssignedShardId(final CoreDescriptor desc, |
| final ClusterState state, final String coreNodeName) { |
| |
| final CloudDescriptor cloudDesc = desc.getCloudDescriptor(); |
| |
| final String shardId = state.getShardId(getNodeName(), desc.getName()); |
| |
| if (shardId != null) { |
| cloudDesc.setShardId(shardId); |
| return false; |
| } |
| return true; |
| } |
| |
| public void unregister(String coreName, CoreDescriptor cd) |
| throws InterruptedException, KeeperException { |
| final String coreNodeName = cd.getCloudDescriptor().getCoreNodeName(); |
| final String collection = cd.getCloudDescriptor().getCollectionName(); |
| assert collection != null; |
| |
| if (collection == null || collection.trim().length() == 0) { |
| log.error("No collection was specified."); |
| return; |
| } |
| |
| ElectionContext context = electionContexts.remove(new ContextKey(collection, coreNodeName)); |
| |
| if (context != null) { |
| context.cancelElection(); |
| } |
| |
| CloudDescriptor cloudDescriptor = cd.getCloudDescriptor(); |
| |
| ZkNodeProps m = new ZkNodeProps(Overseer.QUEUE_OPERATION, |
| Overseer.OverseerAction.DELETECORE.toLower(), ZkStateReader.CORE_NAME_PROP, coreName, |
| ZkStateReader.NODE_NAME_PROP, getNodeName(), |
| ZkStateReader.COLLECTION_PROP, cloudDescriptor.getCollectionName(), |
| ZkStateReader.CORE_NODE_NAME_PROP, coreNodeName); |
| overseerJobQueue.offer(ZkStateReader.toJSON(m)); |
| } |
| |
| public void createCollection(String collection) throws KeeperException, |
| InterruptedException { |
| ZkNodeProps m = new ZkNodeProps(Overseer.QUEUE_OPERATION, |
| CollectionParams.CollectionAction.CREATE.toLower(), ZkStateReader.NODE_NAME_PROP, getNodeName(), |
| ZkStateReader.COLLECTION_PROP, collection); |
| overseerJobQueue.offer(ZkStateReader.toJSON(m)); |
| } |
| |
| public void uploadToZK(File dir, String zkPath) throws IOException, KeeperException, InterruptedException { |
| uploadToZK(zkClient, dir, zkPath); |
| } |
| |
| public void uploadConfigDir(File dir, String configName) throws IOException, KeeperException, InterruptedException { |
| uploadToZK(zkClient, dir, ZkController.CONFIGS_ZKNODE + "/" + configName); |
| } |
| |
| // convenience for testing |
| void printLayoutToStdOut() throws KeeperException, InterruptedException { |
| zkClient.printLayoutToStdOut(); |
| } |
| |
| public void createCollectionZkNode(CloudDescriptor cd) { |
| String collection = cd.getCollectionName(); |
| |
| log.info("Check for collection zkNode:" + collection); |
| String collectionPath = ZkStateReader.COLLECTIONS_ZKNODE + "/" + collection; |
| |
| try { |
| if(!zkClient.exists(collectionPath, true)) { |
| log.info("Creating collection in ZooKeeper:" + collection); |
| SolrParams params = cd.getParams(); |
| |
| try { |
| Map<String,Object> collectionProps = new HashMap<>(); |
| |
| // TODO: if collection.configName isn't set, and there isn't already a conf in zk, just use that? |
| String defaultConfigName = System.getProperty(COLLECTION_PARAM_PREFIX+CONFIGNAME_PROP, collection); |
| |
| // params passed in - currently only done via core admin (create core commmand). |
| if (params != null) { |
| Iterator<String> iter = params.getParameterNamesIterator(); |
| while (iter.hasNext()) { |
| String paramName = iter.next(); |
| if (paramName.startsWith(COLLECTION_PARAM_PREFIX)) { |
| collectionProps.put(paramName.substring(COLLECTION_PARAM_PREFIX.length()), params.get(paramName)); |
| } |
| } |
| |
| // if the config name wasn't passed in, use the default |
| if (!collectionProps.containsKey(CONFIGNAME_PROP)) { |
| // TODO: getting the configName from the collectionPath should fail since we already know it doesn't exist? |
| getConfName(collection, collectionPath, collectionProps); |
| } |
| |
| } else if(System.getProperty("bootstrap_confdir") != null) { |
| // if we are bootstrapping a collection, default the config for |
| // a new collection to the collection we are bootstrapping |
| log.info("Setting config for collection:" + collection + " to " + defaultConfigName); |
| |
| Properties sysProps = System.getProperties(); |
| for (String sprop : System.getProperties().stringPropertyNames()) { |
| if (sprop.startsWith(COLLECTION_PARAM_PREFIX)) { |
| collectionProps.put(sprop.substring(COLLECTION_PARAM_PREFIX.length()), sysProps.getProperty(sprop)); |
| } |
| } |
| |
| // if the config name wasn't passed in, use the default |
| if (!collectionProps.containsKey(CONFIGNAME_PROP)) |
| collectionProps.put(CONFIGNAME_PROP, defaultConfigName); |
| |
| } else if (Boolean.getBoolean("bootstrap_conf")) { |
| // the conf name should should be the collection name of this core |
| collectionProps.put(CONFIGNAME_PROP, cd.getCollectionName()); |
| } else { |
| getConfName(collection, collectionPath, collectionProps); |
| } |
| |
| collectionProps.remove(ZkStateReader.NUM_SHARDS_PROP); // we don't put numShards in the collections properties |
| |
| ZkNodeProps zkProps = new ZkNodeProps(collectionProps); |
| zkClient.makePath(collectionPath, ZkStateReader.toJSON(zkProps), CreateMode.PERSISTENT, null, true); |
| |
| } catch (KeeperException e) { |
| // its okay if the node already exists |
| if (e.code() != KeeperException.Code.NODEEXISTS) { |
| throw e; |
| } |
| } |
| } else { |
| log.info("Collection zkNode exists"); |
| } |
| |
| } catch (KeeperException e) { |
| // its okay if another beats us creating the node |
| if (e.code() == KeeperException.Code.NODEEXISTS) { |
| return; |
| } |
| throw new SolrException(ErrorCode.SERVER_ERROR, "Error creating collection node in Zookeeper", e); |
| } |
| catch (InterruptedException e) { |
| Thread.interrupted(); |
| throw new SolrException(ErrorCode.SERVER_ERROR, "Error creating collection node in Zookeeper", e); |
| } |
| |
| } |
| |
| |
| private void getConfName(String collection, String collectionPath, |
| Map<String,Object> collectionProps) throws KeeperException, |
| InterruptedException { |
| // check for configName |
| log.info("Looking for collection configName"); |
| List<String> configNames = null; |
| int retry = 1; |
| int retryLimt = 6; |
| for (; retry < retryLimt; retry++) { |
| if (zkClient.exists(collectionPath, true)) { |
| ZkNodeProps cProps = ZkNodeProps.load(zkClient.getData(collectionPath, null, null, true)); |
| if (cProps.containsKey(CONFIGNAME_PROP)) { |
| break; |
| } |
| } |
| |
| // if there is only one conf, use that |
| try { |
| configNames = zkClient.getChildren(CONFIGS_ZKNODE, null, |
| true); |
| } catch (NoNodeException e) { |
| // just keep trying |
| } |
| if (configNames != null && configNames.size() == 1) { |
| // no config set named, but there is only 1 - use it |
| log.info("Only one config set found in zk - using it:" + configNames.get(0)); |
| collectionProps.put(CONFIGNAME_PROP, configNames.get(0)); |
| break; |
| } |
| |
| if (configNames != null && configNames.contains(collection)) { |
| log.info("Could not find explicit collection configName, but found config name matching collection name - using that set."); |
| collectionProps.put(CONFIGNAME_PROP, collection); |
| break; |
| } |
| |
| log.info("Could not find collection configName - pausing for 3 seconds and trying again - try: " + retry); |
| Thread.sleep(3000); |
| } |
| if (retry == retryLimt) { |
| log.error("Could not find configName for collection " + collection); |
| throw new ZooKeeperException( |
| SolrException.ErrorCode.SERVER_ERROR, |
| "Could not find configName for collection " + collection + " found:" + configNames); |
| } |
| } |
| |
| public ZkStateReader getZkStateReader() { |
| return zkStateReader; |
| } |
| |
| private void doGetShardIdAndNodeNameProcess(CoreDescriptor cd) { |
| final String coreNodeName = cd.getCloudDescriptor().getCoreNodeName(); |
| |
| if (coreNodeName != null) { |
| waitForShardId(cd); |
| } else { |
| // if no explicit coreNodeName, we want to match by base url and core name |
| waitForCoreNodeName(cd); |
| waitForShardId(cd); |
| } |
| } |
| |
| private void waitForCoreNodeName(CoreDescriptor descriptor) { |
| int retryCount = 320; |
| log.info("look for our core node name"); |
| while (retryCount-- > 0) { |
| Map<String,Slice> slicesMap = zkStateReader.getClusterState() |
| .getSlicesMap(descriptor.getCloudDescriptor().getCollectionName()); |
| if (slicesMap != null) { |
| |
| for (Slice slice : slicesMap.values()) { |
| for (Replica replica : slice.getReplicas()) { |
| // TODO: for really large clusters, we could 'index' on this |
| |
| String nodeName = replica.getStr(ZkStateReader.NODE_NAME_PROP); |
| String core = replica.getStr(ZkStateReader.CORE_NAME_PROP); |
| |
| String msgNodeName = getNodeName(); |
| String msgCore = descriptor.getName(); |
| |
| if (msgNodeName.equals(nodeName) && core.equals(msgCore)) { |
| descriptor.getCloudDescriptor() |
| .setCoreNodeName(replica.getName()); |
| return; |
| } |
| } |
| } |
| } |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| |
| private void waitForShardId(CoreDescriptor cd) { |
| log.info("waiting to find shard id in clusterstate for " + cd.getName()); |
| int retryCount = 320; |
| while (retryCount-- > 0) { |
| final String shardId = zkStateReader.getClusterState().getShardId(getNodeName(), cd.getName()); |
| if (shardId != null) { |
| cd.getCloudDescriptor().setShardId(shardId); |
| return; |
| } |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "Could not get shard id for core: " + cd.getName()); |
| } |
| |
| public static void uploadToZK(SolrZkClient zkClient, File dir, String zkPath) throws IOException, KeeperException, InterruptedException { |
| File[] files = dir.listFiles(); |
| if (files == null) { |
| throw new IllegalArgumentException("Illegal directory: " + dir); |
| } |
| for(File file : files) { |
| if (!file.getName().startsWith(".")) { |
| if (!file.isDirectory()) { |
| zkClient.makePath(zkPath + "/" + file.getName(), file, false, true); |
| } else { |
| uploadToZK(zkClient, file, zkPath + "/" + file.getName()); |
| } |
| } |
| } |
| } |
| |
| public static void downloadFromZK(SolrZkClient zkClient, String zkPath, |
| File dir) throws IOException, KeeperException, InterruptedException { |
| List<String> files = zkClient.getChildren(zkPath, null, true); |
| |
| for (String file : files) { |
| List<String> children = zkClient.getChildren(zkPath + "/" + file, null, true); |
| if (children.size() == 0) { |
| byte[] data = zkClient.getData(zkPath + "/" + file, null, null, true); |
| dir.mkdirs(); |
| log.info("Write file " + new File(dir, file)); |
| FileUtils.writeByteArrayToFile(new File(dir, file), data); |
| } else { |
| downloadFromZK(zkClient, zkPath + "/" + file, new File(dir, file)); |
| } |
| } |
| } |
| |
| |
| public String getCoreNodeName(CoreDescriptor descriptor){ |
| String coreNodeName = descriptor.getCloudDescriptor().getCoreNodeName(); |
| if (coreNodeName == null && !genericCoreNodeNames) { |
| // it's the default |
| return getNodeName() + "_" + descriptor.getName(); |
| } |
| |
| return coreNodeName; |
| } |
| |
| public static void uploadConfigDir(SolrZkClient zkClient, File dir, String configName) throws IOException, KeeperException, InterruptedException { |
| uploadToZK(zkClient, dir, ZkController.CONFIGS_ZKNODE + "/" + configName); |
| } |
| |
| public static void downloadConfigDir(SolrZkClient zkClient, String configName, File dir) throws IOException, KeeperException, InterruptedException { |
| downloadFromZK(zkClient, ZkController.CONFIGS_ZKNODE + "/" + configName, dir); |
| } |
| |
| public void preRegister(CoreDescriptor cd ) { |
| |
| String coreNodeName = getCoreNodeName(cd); |
| |
| // before becoming available, make sure we are not live and active |
| // this also gets us our assigned shard id if it was not specified |
| try { |
| checkStateInZk(cd); |
| |
| CloudDescriptor cloudDesc = cd.getCloudDescriptor(); |
| |
| // make sure the node name is set on the descriptor |
| if (cloudDesc.getCoreNodeName() == null) { |
| cloudDesc.setCoreNodeName(coreNodeName); |
| } |
| |
| publish(cd, ZkStateReader.DOWN, false, true); |
| } catch (KeeperException e) { |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, "", e); |
| } |
| |
| if (cd.getCloudDescriptor().getShardId() == null && needsToBeAssignedShardId(cd, zkStateReader.getClusterState(), coreNodeName)) { |
| doGetShardIdAndNodeNameProcess(cd); |
| } else { |
| // still wait till we see us in local state |
| doGetShardIdAndNodeNameProcess(cd); |
| } |
| |
| } |
| |
| private void checkStateInZk(CoreDescriptor cd) throws InterruptedException { |
| if (!Overseer.isLegacy(zkStateReader.getClusterProps())) { |
| CloudDescriptor cloudDesc = cd.getCloudDescriptor(); |
| String coreNodeName = cloudDesc.getCoreNodeName(); |
| assert coreNodeName != null; |
| if (cloudDesc.getShardId() == null) throw new SolrException(ErrorCode.SERVER_ERROR ,"No shard id for :" + cd); |
| long endTime = System.nanoTime() + TimeUnit.NANOSECONDS.convert(3, TimeUnit.SECONDS); |
| String errMessage= null; |
| for (; System.nanoTime()<endTime; ) { |
| Thread.sleep(100); |
| errMessage = null; |
| Slice slice = zkStateReader.getClusterState().getSlice(cd.getCollectionName(), cloudDesc.getShardId()); |
| if (slice == null) { |
| errMessage = "Invalid slice : " + cloudDesc.getShardId(); |
| continue; |
| } |
| if (slice.getReplica(coreNodeName) != null) return; |
| } |
| if(errMessage == null) errMessage = " no_such_replica in clusterstate ,replicaName : " + coreNodeName; |
| throw new SolrException(ErrorCode.SERVER_ERROR,errMessage + "state : "+ zkStateReader.getClusterState().getCollection(cd.getCollectionName())); |
| } |
| } |
| |
| private ZkCoreNodeProps waitForLeaderToSeeDownState( |
| CoreDescriptor descriptor, final String coreZkNodeName) { |
| CloudDescriptor cloudDesc = descriptor.getCloudDescriptor(); |
| String collection = cloudDesc.getCollectionName(); |
| String shard = cloudDesc.getShardId(); |
| ZkCoreNodeProps leaderProps = null; |
| |
| int retries = 6; |
| for (int i = 0; i < retries; i++) { |
| try { |
| if (isClosed) { |
| throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, |
| "We have been closed"); |
| } |
| |
| // go straight to zk, not the cloud state - we must have current info |
| leaderProps = getLeaderProps(collection, shard, 30000); |
| break; |
| } catch (Exception e) { |
| SolrException.log(log, "There was a problem finding the leader in zk", e); |
| try { |
| Thread.sleep(2000); |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } |
| if (i == retries - 1) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, "There was a problem finding the leader in zk"); |
| } |
| } |
| } |
| |
| String leaderBaseUrl = leaderProps.getBaseUrl(); |
| String leaderCoreName = leaderProps.getCoreName(); |
| |
| String myCoreNodeName = cloudDesc.getCoreNodeName(); |
| String myCoreName = descriptor.getName(); |
| String ourUrl = ZkCoreNodeProps.getCoreUrl(getBaseUrl(), myCoreName); |
| |
| boolean isLeader = leaderProps.getCoreUrl().equals(ourUrl); |
| if (!isLeader && !SKIP_AUTO_RECOVERY) { |
| |
| // detect if this core is in leader-initiated recovery and if so, |
| // then we don't need the leader to wait on seeing the down state |
| String lirState = null; |
| try { |
| lirState = getLeaderInitiatedRecoveryState(collection, shard, myCoreNodeName); |
| } catch (Exception exc) { |
| log.error("Failed to determine if replica "+myCoreNodeName+ |
| " is in leader-initiated recovery due to: "+exc, exc); |
| } |
| |
| if (lirState != null) { |
| log.info("Replica "+myCoreNodeName+ |
| " is already in leader-initiated recovery, so not waiting for leader to see down state."); |
| } else { |
| |
| log.info("Replica "+myCoreNodeName+ |
| " NOT in leader-initiated recovery, need to wait for leader to see down state."); |
| |
| HttpSolrServer server = null; |
| server = new HttpSolrServer(leaderBaseUrl); |
| try { |
| server.setConnectionTimeout(15000); |
| server.setSoTimeout(120000); |
| WaitForState prepCmd = new WaitForState(); |
| prepCmd.setCoreName(leaderCoreName); |
| prepCmd.setNodeName(getNodeName()); |
| prepCmd.setCoreNodeName(coreZkNodeName); |
| prepCmd.setState(ZkStateReader.DOWN); |
| |
| // let's retry a couple times - perhaps the leader just went down, |
| // or perhaps he is just not quite ready for us yet |
| retries = 6; |
| for (int i = 0; i < retries; i++) { |
| if (isClosed) { |
| throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, |
| "We have been closed"); |
| } |
| try { |
| server.request(prepCmd); |
| break; |
| } catch (Exception e) { |
| SolrException.log(log, |
| "There was a problem making a request to the leader", e); |
| try { |
| Thread.sleep(2000); |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } |
| if (i == retries - 1) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "There was a problem making a request to the leader"); |
| } |
| } |
| } |
| } finally { |
| server.shutdown(); |
| } |
| } |
| } |
| return leaderProps; |
| } |
| |
| public static void linkConfSet(SolrZkClient zkClient, String collection, String confSetName) throws KeeperException, InterruptedException { |
| String path = ZkStateReader.COLLECTIONS_ZKNODE + "/" + collection; |
| if (log.isInfoEnabled()) { |
| log.info("Load collection config from:" + path); |
| } |
| byte[] data; |
| try { |
| data = zkClient.getData(path, null, null, true); |
| } catch (NoNodeException e) { |
| // if there is no node, we will try and create it |
| // first try to make in case we are pre configuring |
| ZkNodeProps props = new ZkNodeProps(CONFIGNAME_PROP, confSetName); |
| try { |
| |
| zkClient.makePath(path, ZkStateReader.toJSON(props), |
| CreateMode.PERSISTENT, null, true); |
| } catch (KeeperException e2) { |
| // its okay if the node already exists |
| if (e2.code() != KeeperException.Code.NODEEXISTS) { |
| throw e; |
| } |
| // if we fail creating, setdata |
| // TODO: we should consider using version |
| zkClient.setData(path, ZkStateReader.toJSON(props), true); |
| } |
| return; |
| } |
| // we found existing data, let's update it |
| ZkNodeProps props = null; |
| if(data != null) { |
| props = ZkNodeProps.load(data); |
| Map<String,Object> newProps = new HashMap<>(); |
| newProps.putAll(props.getProperties()); |
| newProps.put(CONFIGNAME_PROP, confSetName); |
| props = new ZkNodeProps(newProps); |
| } else { |
| props = new ZkNodeProps(CONFIGNAME_PROP, confSetName); |
| } |
| |
| // TODO: we should consider using version |
| zkClient.setData(path, ZkStateReader.toJSON(props), true); |
| |
| } |
| |
| /** |
| * If in SolrCloud mode, upload config sets for each SolrCore in solr.xml. |
| */ |
| public static void bootstrapConf(SolrZkClient zkClient, CoreContainer cc, String solrHome) throws IOException, |
| KeeperException, InterruptedException { |
| |
| //List<String> allCoreNames = cfg.getAllCoreNames(); |
| List<CoreDescriptor> cds = cc.getCoresLocator().discover(cc); |
| |
| log.info("bootstrapping config for " + cds.size() + " cores into ZooKeeper using solr.xml from " + solrHome); |
| |
| for (CoreDescriptor cd : cds) { |
| String coreName = cd.getName(); |
| String confName = cd.getCollectionName(); |
| if (StringUtils.isEmpty(confName)) |
| confName = coreName; |
| String instanceDir = cd.getInstanceDir(); |
| File udir = new File(instanceDir, "conf"); |
| log.info("Uploading directory " + udir + " with name " + confName + " for SolrCore " + coreName); |
| ZkController.uploadConfigDir(zkClient, udir, confName); |
| } |
| } |
| |
| public DistributedQueue getOverseerJobQueue() { |
| return overseerJobQueue; |
| } |
| |
| public DistributedQueue getOverseerCollectionQueue() { |
| return overseerCollectionQueue; |
| } |
| |
| public DistributedMap getOverseerRunningMap() { |
| return overseerRunningMap; |
| } |
| |
| public DistributedMap getOverseerCompletedMap() { |
| return overseerCompletedMap; |
| } |
| |
| public DistributedMap getOverseerFailureMap() { |
| return overseerFailureMap; |
| } |
| |
| public int getClientTimeout() { |
| return clientTimeout; |
| } |
| |
| public Overseer getOverseer() { |
| return overseer; |
| } |
| |
| public LeaderElector getOverseerElector() { |
| return overseerElector; |
| } |
| |
| /** |
| * Returns the nodeName that should be used based on the specified properties. |
| * |
| * @param hostName - must not be null or the empty string |
| * @param hostPort - must consist only of digits, must not be null or the empty string |
| * @param hostContext - should not begin or end with a slash (leading/trailin slashes will be ignored), must not be null, may be the empty string to denote the root context |
| * @lucene.experimental |
| * @see ZkStateReader#getBaseUrlForNodeName |
| */ |
| static String generateNodeName(final String hostName, |
| final String hostPort, |
| final String hostContext) { |
| try { |
| return hostName + ':' + hostPort + '_' + |
| URLEncoder.encode(trimLeadingAndTrailingSlashes(hostContext), "UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| throw new Error("JVM Does not seem to support UTF-8", e); |
| } |
| } |
| |
| /** |
| * Utility method for trimming and leading and/or trailing slashes from |
| * it's input. May return the empty string. May return null if and only |
| * if the input is null. |
| */ |
| public static String trimLeadingAndTrailingSlashes(final String in) { |
| if (null == in) return in; |
| |
| String out = in; |
| if (out.startsWith("/")) { |
| out = out.substring(1); |
| } |
| if (out.endsWith("/")) { |
| out = out.substring(0,out.length()-1); |
| } |
| return out; |
| } |
| |
| public void rejoinOverseerElection(String electionNode, boolean joinAtHead) { |
| try { |
| if(electionNode !=null){ |
| //this call is from inside the JVM . not from CoreAdminHandler |
| if(overseerElector.getContext() == null || overseerElector.getContext().leaderSeqPath == null){ |
| overseerElector.retryElection(new OverseerElectionContext(zkClient, |
| overseer, getNodeName()), joinAtHead); |
| return; |
| } |
| if(!overseerElector.getContext().leaderSeqPath.endsWith(electionNode)){ |
| log.warn("Asked to rejoin with wrong election node : {}, current node is {}",electionNode, overseerElector.getContext().leaderSeqPath); |
| //however delete it . This is possible when the last attempt at deleting the election node failed. |
| if(electionNode.startsWith(getNodeName())){ |
| try { |
| zkClient.delete(OverseerElectionContext.PATH+LeaderElector.ELECTION_NODE+"/"+electionNode,-1,true); |
| } catch (NoNodeException e) { |
| //no problem |
| } catch (InterruptedException e){ |
| Thread.currentThread().interrupt(); |
| } catch(Exception e) { |
| log.warn("Old election node exists , could not be removed ",e); |
| } |
| } |
| } |
| }else { |
| overseerElector.retryElection(overseerElector.getContext(), joinAtHead); |
| } |
| } catch (Exception e) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, "Unable to rejoin election", e); |
| } |
| |
| } |
| |
| public void checkOverseerDesignate() { |
| try { |
| byte[] data = zkClient.getData(ZkStateReader.ROLES, null, new Stat(), true); |
| if(data ==null) return; |
| Map roles = (Map) ZkStateReader.fromJSON(data); |
| if(roles ==null) return; |
| List nodeList= (List) roles.get("overseer"); |
| if(nodeList == null) return; |
| if(nodeList.contains(getNodeName())){ |
| ZkNodeProps props = new ZkNodeProps(Overseer.QUEUE_OPERATION, CollectionParams.CollectionAction.ADDROLE.toString().toLowerCase(Locale.ROOT), |
| "node", getNodeName(), |
| "role", "overseer"); |
| log.info("Going to add role {} ",props); |
| getOverseerCollectionQueue().offer(ZkStateReader.toJSON(props)); |
| } |
| } catch (NoNodeException nne){ |
| return; |
| } catch (Exception e) { |
| log.warn("could not readd the overseer designate ",e); |
| } |
| } |
| |
| CoreContainer getCoreContainer(){ |
| return cc; |
| } |
| |
| /** |
| * When a leader receives a communication error when trying to send a request to a replica, |
| * it calls this method to ensure the replica enters recovery when connectivity is restored. |
| * |
| * returns true if the node hosting the replica is still considered "live" by ZooKeeper; |
| * false means the node is not live either, so no point in trying to send recovery commands |
| * to it. |
| */ |
| public boolean ensureReplicaInLeaderInitiatedRecovery(final String collection, |
| final String shardId, final String replicaUrl, final ZkCoreNodeProps replicaCoreProps, boolean forcePublishState) |
| throws KeeperException, InterruptedException |
| { |
| if (collection == null) |
| throw new IllegalArgumentException("collection parameter cannot be null for starting leader-initiated recovery for replica: "+replicaUrl); |
| |
| if (shardId == null) |
| throw new IllegalArgumentException("shard parameter cannot be null for starting leader-initiated recovery for replica: "+replicaUrl); |
| |
| if (replicaUrl == null) |
| throw new IllegalArgumentException("replicaUrl parameter cannot be null for starting leader-initiated recovery"); |
| |
| // First, determine if this replica is already in recovery handling |
| // which is needed because there can be many concurrent errors flooding in |
| // about the same replica having trouble and we only need to send the "needs" |
| // recovery signal once |
| boolean nodeIsLive = true; |
| boolean publishDownState = false; |
| String replicaNodeName = replicaCoreProps.getNodeName(); |
| String replicaCoreNodeName = ((Replica)replicaCoreProps.getNodeProps()).getName(); |
| assert replicaCoreNodeName != null : "No core name for replica "+replicaNodeName; |
| synchronized (replicasInLeaderInitiatedRecovery) { |
| if (replicasInLeaderInitiatedRecovery.containsKey(replicaUrl)) { |
| if (!forcePublishState) { |
| log.debug("Replica {} already in leader-initiated recovery handling.", replicaUrl); |
| return false; // already in this recovery process |
| } |
| } |
| |
| // if the replica's state is not DOWN right now, make it so ... |
| // we only really need to try to send the recovery command if the node itself is "live" |
| if (getZkStateReader().getClusterState().liveNodesContain(replicaNodeName)) { |
| replicasInLeaderInitiatedRecovery.put(replicaUrl, |
| getLeaderInitiatedRecoveryZnodePath(collection, shardId, replicaCoreNodeName)); |
| // create a znode that requires the replica needs to "ack" to verify it knows it was out-of-sync |
| updateLeaderInitiatedRecoveryState(collection, shardId, replicaCoreNodeName, ZkStateReader.DOWN); |
| log.info("Put replica core={} coreNodeName={} on "+ |
| replicaNodeName+" into leader-initiated recovery.", replicaCoreProps.getCoreName(), replicaCoreNodeName); |
| publishDownState = true; |
| } else { |
| nodeIsLive = false; // we really don't need to send the recovery request if the node is NOT live |
| log.info("Node " + replicaNodeName + |
| " is not live, so skipping leader-initiated recovery for replica: core={} coreNodeName={}", |
| replicaCoreProps.getCoreName(), replicaCoreNodeName); |
| // publishDownState will be false to avoid publishing the "down" state too many times |
| // as many errors can occur together and will each call into this method (SOLR-6189) |
| } |
| } |
| |
| if (publishDownState || forcePublishState) { |
| String replicaCoreName = replicaCoreProps.getCoreName(); |
| ZkNodeProps m = new ZkNodeProps(Overseer.QUEUE_OPERATION, "state", |
| ZkStateReader.STATE_PROP, ZkStateReader.DOWN, |
| ZkStateReader.BASE_URL_PROP, replicaCoreProps.getBaseUrl(), |
| ZkStateReader.CORE_NAME_PROP, replicaCoreProps.getCoreName(), |
| ZkStateReader.NODE_NAME_PROP, replicaCoreProps.getNodeName(), |
| ZkStateReader.SHARD_ID_PROP, shardId, |
| ZkStateReader.COLLECTION_PROP, collection); |
| log.warn("Leader is publishing core={} coreNodeName ={} state={} on behalf of un-reachable replica {}; forcePublishState? "+forcePublishState, |
| replicaCoreName, replicaCoreNodeName, ZkStateReader.DOWN, replicaUrl); |
| overseerJobQueue.offer(ZkStateReader.toJSON(m)); |
| } |
| |
| return nodeIsLive; |
| } |
| |
| public boolean isReplicaInRecoveryHandling(String replicaUrl) { |
| boolean exists = false; |
| synchronized (replicasInLeaderInitiatedRecovery) { |
| exists = replicasInLeaderInitiatedRecovery.containsKey(replicaUrl); |
| } |
| return exists; |
| } |
| |
| public void removeReplicaFromLeaderInitiatedRecoveryHandling(String replicaUrl) { |
| synchronized(replicasInLeaderInitiatedRecovery) { |
| replicasInLeaderInitiatedRecovery.remove(replicaUrl); |
| } |
| } |
| |
| public String getLeaderInitiatedRecoveryState(String collection, String shardId, String coreNodeName) { |
| |
| if (collection == null || shardId == null || coreNodeName == null) |
| return null; // if we don't have complete data about a core in cloud mode, return null |
| |
| String znodePath = getLeaderInitiatedRecoveryZnodePath(collection, shardId, coreNodeName); |
| String state = null; |
| try { |
| byte[] data = zkClient.getData(znodePath, null, new Stat(), false); |
| if (data != null && data.length > 0) |
| state = new String(data, "UTF-8"); |
| } catch (NoNodeException ignoreMe) { |
| // safe to ignore as this znode will only exist if the leader initiated recovery |
| } catch (ConnectionLossException cle) { |
| // sort of safe to ignore ??? Usually these are seen when the core is going down |
| // or there are bigger issues to deal with than reading this znode |
| log.warn("Unable to read "+znodePath+" due to: "+cle); |
| } catch (SessionExpiredException see) { |
| // sort of safe to ignore ??? Usually these are seen when the core is going down |
| // or there are bigger issues to deal with than reading this znode |
| log.warn("Unable to read "+znodePath+" due to: "+see); |
| } catch (UnsupportedEncodingException e) { |
| throw new Error("JVM Does not seem to support UTF-8", e); |
| } catch (Exception exc) { |
| log.error("Failed to read data from znode "+znodePath+" due to: "+exc); |
| if (exc instanceof SolrException) { |
| throw (SolrException)exc; |
| } else { |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "Failed to read data from znodePath: "+znodePath, exc); |
| } |
| } |
| return state; |
| } |
| |
| private void updateLeaderInitiatedRecoveryState(String collection, String shardId, String coreNodeName, String state) { |
| if (collection == null || shardId == null || coreNodeName == null) { |
| log.warn("Cannot set leader-initiated recovery state znode to "+state+" using: collection="+collection+ |
| "; shardId="+shardId+"; coreNodeName="+coreNodeName); |
| return; // if we don't have complete data about a core in cloud mode, do nothing |
| } |
| |
| String znodePath = getLeaderInitiatedRecoveryZnodePath(collection, shardId, coreNodeName); |
| |
| if (ZkStateReader.ACTIVE.equals(state)) { |
| // since we're marking it active, we don't need this znode anymore, so delete instead of update |
| try { |
| zkClient.delete(znodePath, -1, false); |
| } catch (Exception justLogIt) { |
| log.warn("Failed to delete znode "+znodePath+" due to: "+justLogIt); |
| } |
| return; |
| } |
| |
| byte[] znodeData = null; |
| try { |
| znodeData = state.getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| throw new Error("JVM Does not seem to support UTF-8", e); |
| } |
| |
| boolean retryOnConnLoss = true; // be a little more robust when trying to write data |
| try { |
| if (zkClient.exists(znodePath, retryOnConnLoss)) { |
| zkClient.setData(znodePath, znodeData, retryOnConnLoss); |
| } else { |
| zkClient.makePath(znodePath, znodeData, retryOnConnLoss); |
| } |
| log.info("Wrote "+state+" to "+znodePath); |
| } catch (Exception exc) { |
| if (exc instanceof SolrException) { |
| throw (SolrException)exc; |
| } else { |
| throw new SolrException(ErrorCode.SERVER_ERROR, |
| "Failed to update data to "+state+" for znode: "+znodePath, exc); |
| } |
| } |
| } |
| |
| public String getLeaderInitiatedRecoveryZnodePath(String collection, String shardId) { |
| return "/collections/"+collection+"/leader_initiated_recovery/"+shardId; |
| } |
| |
| public String getLeaderInitiatedRecoveryZnodePath(String collection, String shardId, String coreNodeName) { |
| return getLeaderInitiatedRecoveryZnodePath(collection, shardId)+"/"+coreNodeName; |
| } |
| |
| public void throwErrorIfReplicaReplaced(CoreDescriptor desc) { |
| ClusterState clusterState = getZkStateReader().getClusterState(); |
| if (clusterState != null) { |
| DocCollection collection = clusterState.getCollectionOrNull(desc |
| .getCloudDescriptor().getCollectionName()); |
| if (collection != null) { |
| boolean autoAddReplicas = ClusterStateUtil.isAutoAddReplicas( getZkStateReader(), collection.getName()); |
| if (autoAddReplicas) { |
| CloudUtil.checkSharedFSFailoverReplaced(cc, desc); |
| } |
| } |
| } |
| } |
| } |
