Google Git
Sign in
apache / incubator-heron / refs/heads/asf-site / . / content / docs / 0.20.1-incubating / guides-ui-guide.html
blob: c5165a457856ea8b0de3d4d5988f4fa0a0386e2e [file] [log] [blame]
<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Heron UI Guide · Apache Heron</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;!--"/><meta name="docsearch:version" content="0.20.1-incubating"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Heron UI Guide · Apache Heron"/><meta property="og:type" content="website"/><meta property="og:url" content="https://heron.apache.org/"/><meta property="og:description" content="&lt;!--"/><meta property="og:image" content="https://heron.apache.org/img/undraw_online.svg"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://heron.apache.org/img/undraw_tweetstorm.svg"/><link rel="shortcut icon" href="/img/favicon-32x32.png"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><link rel="alternate" type="application/atom+xml" href="https://heron.apache.org/blog/atom.xml" title="Apache Heron Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://heron.apache.org/blog/feed.xml" title="Apache Heron Blog RSS Feed"/><script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-198017384-1', 'auto');
ga('send', 'pageview');
</script><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="/js/custom.js"></script><script type="text/javascript" src="/js/fix-location.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/"><img class="logo" src="/img/HeronTextLogo-small.png" alt="Apache Heron"/><h2 class="headerTitleWithLogo">Apache Heron</h2></a><a href="/versions"><h3>0.20.1-incubating</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class=""><a href="/api/java" target="_self">Javadocs</a></li><li class=""><a href="/api/python" target="_self">Pydocs</a></li><li class="siteNavGroupActive"><a href="/docs/0.20.1-incubating/getting-started-local-single-node" target="_self">Docs</a></li><li class=""><a href="/download" target="_self">Downloads</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#apache" target="_self">Apache</a></li></ul></nav></div></header></div></div><div class="navPusher"><div class="docMainWrapper wrapper"><div class="container docsNavContainer" id="docsNav"><nav class="toc"><div class="toggleNav"><section class="navWrapper wrapper"><div class="navBreadcrumb wrapper"><div class="navToggle" id="navToggler"><div class="hamburger-menu"><div class="line1"></div><div class="line2"></div><div class="line3"></div></div></div><h2><i>›</i><span>Guides</span></h2><div class="tocToggler" id="tocToggler"><i class="icon-toc"></i></div></div><div class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle">Getting Started</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/getting-started-local-single-node">Local (Single Node)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/getting-started-migrate-storm-topologies">Migrate Storm Topologies</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/getting-started-troubleshooting-guide">Troubleshooting Guide</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Deployment</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/deployment-overview">Deployment Overiew</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/deployment-configuration">Configuration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/deployment-api-server">The Heron API Server</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Topology Development APIs</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/topology-development-streamlet-api">The Heron Streamlet API for Java</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/topology-development-eco-api">The ECO API for Java</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/topology-development-topology-api-java">The Heron Topology API for Java</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/topology-development-topology-api-python">The Heron Topology API for Python</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/topology-development-streamlet-scala">The Heron Streamlet API for Scala</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Client API Docs</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/client-api-docs-overview">Client API Docs</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Guides</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-effectively-once-java-topologies">Effectively Once Java Topologies</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-data-model">Heron Data Model</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-tuple-serialization">Tuple Serialization</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/0.20.1-incubating/guides-ui-guide">Heron UI Guide</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-topology-tuning">Topology Tuning Guide</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-packing-algorithms">Packing Algorithms</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-simulator-mode">Simulator Mode</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/guides-troubeshooting-guide">Topology Troubleshooting Guide</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Heron Concepts</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-design-goals">Heron Design Goals</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-topology-concepts">Heron Topologies</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-streamlet-concepts">Heron Streamlets</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-architecture">Heron Architecture</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-delivery-semantics">Heron Delivery Semantics</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">State Managers</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/state-managers-zookeeper">Zookeeper</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/state-managers-local-fs">Local File System</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Uploaders</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/uploaders-local-fs">Local File System</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/uploaders-hdfs">HDFS</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/uploaders-http">HTTP</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/uploaders-amazon-s3">Amazon S3</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/uploaders-scp">Secure Copy (SCP)</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Schedulers</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-k8s-by-hand">Kubernetes by hand</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-k8s-with-helm">Kubernetes with Helm</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-aurora-cluster">Aurora Cluster</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-aurora-local">Aurora Locally</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-local">Local Cluster</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-nomad">Nomad</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-mesos-local-mac">Mesos Cluster Locally</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-slurm">Slurm Cluster</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/schedulers-yarn">YARN Cluster</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Cluster Configuration</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-overview">Cluster Config Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-system-level">System Level Configuration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-instance">Heron Instance</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-metrics">Metrics Manager</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-stream">Stream Manager</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/cluster-config-tmanager">Topology Manager</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Observability</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/observability-prometheus">Prometheus</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/observability-graphite">Graphite</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/observability-scribe">Scribe</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">User Manuals</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-heron-cli">Heron Client</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-heron-explorer">Heron Explorer</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-tracker-rest">Heron Tracker REST API</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-heron-tracker-runbook">Heron Tracker Runbook</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-heron-ui-runbook">Heron UI Runbook</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/user-manuals-heron-shell">Heron Shell</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Compiling</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-overview">Compiling Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-linux">Compiling on Linux</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-osx">Compiling on OS X</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-docker">Compiling With Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-running-tests">Running Tests</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/compiling-code-organization">Code Organization</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Extending Heron</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/extending-heron-scheduler">Custom Scheduler</a></li><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/extending-heron-metric-sink">Custom Metrics Sink</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Heron Resources</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/0.20.1-incubating/heron-resources-resources">Heron Resources</a></li></ul></div></div></section></div><script>
var coll = document.getElementsByClassName('collapsible');
var checkActiveCategory = true;
for (var i = 0; i < coll.length; i++) {
var links = coll[i].nextElementSibling.getElementsByTagName('*');
if (checkActiveCategory){
for (var j = 0; j < links.length; j++) {
if (links[j].classList.contains('navListItemActive')){
coll[i].nextElementSibling.classList.toggle('hide');
coll[i].childNodes[1].classList.toggle('rotate');
checkActiveCategory = false;
break;
}
}
}
coll[i].addEventListener('click', function() {
var arrow = this.childNodes[1];
arrow.classList.toggle('rotate');
var content = this.nextElementSibling;
content.classList.toggle('hide');
});
}
document.addEventListener('DOMContentLoaded', function() {
createToggler('#navToggler', '#docsNav', 'docsSliderActive');
createToggler('#tocToggler', 'body', 'tocActive');
var headings = document.querySelector('.toc-headings');
headings && headings.addEventListener('click', function(event) {
var el = event.target;
while(el !== headings){
if (el.tagName === 'A') {
document.body.classList.remove('tocActive');
break;
} else{
el = el.parentNode;
}
}
}, false);
function createToggler(togglerSelector, targetSelector, className) {
var toggler = document.querySelector(togglerSelector);
var target = document.querySelector(targetSelector);
if (!toggler) {
return;
}
toggler.onclick = function(event) {
event.preventDefault();
target.classList.toggle(className);
};
}
});
</script></nav></div><div class="container mainContainer"><div class="wrapper"><div class="post"><header class="postHeader"><h1 class="postHeaderTitle">Heron UI Guide</h1></header><article><div><span><!--
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.
-->
<h3><a class="anchor" aria-hidden="true" id="overview"></a><a href="#overview" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Overview</h3>
<p>This guide describes how to make best use of Heron UI for monitoring and
debugging topologies.</p>
<p>The UI provides a lot of information about a topology or a part of it quickly,
thus reducing debugging time considerably. Some of these features are
listed below. A complete set of features can be found in following sections.</p>
<ol>
<li>See logical plan of a topology</li>
<li>See physical plan of a topology</li>
<li>Configs of a topology</li>
<li>See some basic metrics for each of the instances and components</li>
<li>Links to get logs, memory histogram, jstack, heapdump and exceptions of
a particular instance</li>
</ol>
<h4><a class="anchor" aria-hidden="true" id="topologies-page"></a><a href="#topologies-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Topologies Page</h4>
<p>Heron UI is a user interface that uses the Heron Tracker to display detailed, colorful visual representations of topologies, including the logical and physical plan for each topology.</p>
<p>Start the Heron tracker using <code>heron-tracker &amp;</code> which uses default heron_tracker.yaml configuration file. It's a centralized gateway for cluster-wide information about topologies, including which topologies are running, being launched, being killed, etc. It exposes Json Restful endpoint and relies on Zookeeper nodes.</p>
<p>Launc the Heron UI by the command:</p>
<pre><code class="hljs css language-bash">heron-ui &amp;
</code></pre>
<p>By default Heron UI will be started at <code>http://localhost:8889</code></p>
<p>Below is the home page of Heron UI.</p>
<p>The following information or actions can be found on this page.</p>
<ol>
<li>List of all topologies</li>
<li>Number of topologies filtered after search (total by default)</li>
<li>A topology's overview</li>
<li>Filter the topologies using <code>cluster</code></li>
<li>Filter the topologies using string matching in names, clusters, environs,
roles, versions, or submitters</li>
<li>Sort the topologies based on a particular column</li>
<li>Click on the topology name to find more info about the topology</li>
</ol>
<p><img src="/docs/assets/all-topologies.png" alt="All topologies"></p>
<h4><a class="anchor" aria-hidden="true" id="topology-page"></a><a href="#topology-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Topology Page</h4>
<p>Below is the main page to monitor a topology.</p>
<ol>
<li>Name of the topology</li>
<li><a href="heron-topology-concepts#logical-plan">Logical plan</a> of the topology</li>
<li><a href="heron-topology-concepts#physical-plan">Physical plan</a> of the topology</li>
<li>Health metrics for the topology</li>
<li>General info about the topology</li>
<li>General metrics for the topology</li>
<li>Click components for more details</li>
<li>Click instances for more details</li>
<li>Click on aggregated metrics to color instances by metrics</li>
<li>Link to topology level configs</li>
<li>Link to job page only if the scheduler provides a link</li>
</ol>
<!-- (TODO: Link to this guide) -->
12. Link to viz dashboard for this topology only if Tracker is configured with
one. <!-- (TODO: Link to this configuration) -->
<p><img src="/docs/assets/topology1.png" alt="Topology1"></p>
<p><img src="/docs/assets/topology2.png" alt="Topology2"></p>
<p>Each node in logical plan can be clicked for more specific info about that
component.</p>
<ol>
<li>Averaged or max metrics for all instances of this component</li>
<li>Aggregated metrics for all instances of this component</li>
<li>List of all instances and their aggregated metrics</li>
<li><a href="#instance-actions-pages">Instance level operations</a>, which are described in more details below</li>
</ol>
<p><img src="/docs/assets/topology-component.png" alt="Topology Component"></p>
<p>Clicking on an instance will highlight that instance in the list.</p>
<ol>
<li>Aggregated metrics are only for this instance</li>
<li>Quick access to logs, exceptions and job pages for this instance</li>
<li>Component counters are still aggregated for all instances</li>
<li>The selected instance is highlighted</li>
</ol>
<p><img src="/docs/assets/topology-instance.png" alt="Topology Instance"></p>
<h4><a class="anchor" aria-hidden="true" id="aggregate-topology-metrics"></a><a href="#aggregate-topology-metrics" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Aggregate Topology Metrics</h4>
<p>Selecting a metric will highlight the components and instances based on their
health with respect to the metric, green being healthy, red indicating a problem.
This is a quick way to find out which instances are having issues.</p>
<p><img src="/docs/assets/topology-capacity.png" alt="Topology Capacity"></p>
<p><img src="/docs/assets/topology-failures.png" alt="Topology Failures"></p>
<h4><a class="anchor" aria-hidden="true" id="config-page"></a><a href="#config-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Config Page</h4>
<p>These are the topology configurations <!-- (TODO: Add link to Topology
Configurations) --> that your topology is configured with. Note that spout and
bolt level configurations are not part of topology config.</p>
<p><img src="/docs/assets/config.png" alt="Config"></p>
<h4><a class="anchor" aria-hidden="true" id="a-name-instance-actions-pages-instance-action-pages-a"></a><a href="#a-name-instance-actions-pages-instance-action-pages-a" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><a name="instance-actions-pages">Instance Action Pages</a></h4>
<p>These actions are available for all the instances. They are described in the
next sections.</p>
<p><img src="/docs/assets/topology-instance-links.png" alt="Instance Links"></p>
<h4><a class="anchor" aria-hidden="true" id="logs-page"></a><a href="#logs-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Logs Page</h4>
<p>These are the logs generated by the selected instance. The whole logs file can
also be downloaded.</p>
<p><img src="/docs/assets/logs.png" alt="Logs"></p>
<h4><a class="anchor" aria-hidden="true" id="job-page"></a><a href="#job-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Job Page</h4>
<p>Below is the directory view of the container. All instances from a container
will point to the same job page. Following information is available on this page,
amongst other things.</p>
<ol>
<li>The jar or tar file associated with this topology</li>
<li>Logs for heron-executor <!-- TODO: Link heron-executor --></li>
<li><code>log-files</code> folder which has instance logs, as well as <code>stream manager</code> or
<code>tmanager</code> logs.</li>
</ol>
<p><img src="/docs/assets/jobpage1.png" alt="Jobpage"></p>
<p><img src="/docs/assets/jobpage2-logfiles.png" alt="Jobpage logfiles"></p>
<h4><a class="anchor" aria-hidden="true" id="exceptions-page"></a><a href="#exceptions-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Exceptions Page</h4>
<p>This page lists all exceptions logged by this instance. The exceptions are
deduplicated, and for each exception, the page shows the number of times this
exception occurred, the latest and the oldest occurance times.</p>
<p><img src="/docs/assets/exceptions.png" alt="Exceptions"></p>
<h4><a class="anchor" aria-hidden="true" id="pid-page"></a><a href="#pid-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>PID Page</h4>
<p>This link can be used to find the process ID for an instance. Since each instance
runs in its own JVM process, this will be unique for a host. The PID is also
used for other tasks, such as getting jstack or heap dump for an instance.</p>
<p><img src="/docs/assets/pid.png" alt="PID"></p>
<h4><a class="anchor" aria-hidden="true" id="jstack-page"></a><a href="#jstack-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Jstack Page</h4>
<p>Click on this link to run the <code>jstack</code> command on the host against the PID for
the instance. The output of the command is printed on the page in the browser
itself.</p>
<p><img src="/docs/assets/jstack.png" alt="Jstack"></p>
<h4><a class="anchor" aria-hidden="true" id="memory-histogram-page"></a><a href="#memory-histogram-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Memory Histogram Page</h4>
<p>Click on this link to run the <code>jmap -histo</code> command on the host against the PID
for the instance. The output of the command is printed on the page in the
browser itself.</p>
<p><img src="/docs/assets/histo.png" alt="Histo"></p>
<h4><a class="anchor" aria-hidden="true" id="memory-dump-page"></a><a href="#memory-dump-page" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Memory Dump page</h4>
<p>Click on this link to run the <code>jmap -dump:format=b,file=/tmp/heap.bin</code> command
agaist the PID for the instance. Follow the instructions on the page to download
the heap dump file. This link does not download the file.</p>
<p><img src="/docs/assets/dump.png" alt="Memory Dump"></p>
<h4><a class="anchor" aria-hidden="true" id="kill-heron-ui-server"></a><a href="#kill-heron-ui-server" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Kill Heron UI server</h4>
<p>To kill Heron UI server run the following command:</p>
<pre><code class="hljs css language-bash"><span class="hljs-built_in">kill</span> $(pgrep -f heron-ui)
</code></pre>
<p>To stop all the Heron tools, kill the Heron Tracker as well using <code>kill $(pgrep -f heron-tracker)</code>.</p>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/0.20.1-incubating/guides-tuple-serialization"><span class="arrow-prev">← </span><span>Tuple Serialization</span></a><a class="docs-next button" href="/docs/0.20.1-incubating/guides-topology-tuning"><span>Topology Tuning Guide</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><div class="apache-disclaimer">Apache Heron is an effort undergoing incubation at <a target="_blank" href="https://apache.org/">The Apache Software Foundation (ASF)</a> sponsored by the Apache Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.<br/><br/>Apache®, the names of Apache projects, and the feather logo are either <a rel="external" href="https://www.apache.org/foundation/marks/list/">registered trademarks or trademarks</a> of the Apache Software Foundation in the United States and/or other countries.<br/><br/><div class="copyright-box">Copyright © 2023 the Apache Software Foundation, Apache Heron, Heron,
Apache, the Apache feather Logo, and the Apache Heron project logo are either registered
trademarks or trademarks of the Apache Software Foundation.</div></div><div class="apache-links"><a class="item" rel="external" href="https://incubator.apache.org/">Apache Incubator</a><div><a class="item" rel="external" href="https://www.apache.org/">About the ASF</a></div><div><a class="item" rel="external" href="https://www.apache.org/events/current-event">Events</a></div><div><a class="item" rel="external" href="https://www.apache.org/foundation/thanks.html">Thanks</a></div><div><a class="item" rel="external" href="https://www.apache.org/foundation/sponsorship.html">Become a Sponsor</a></div><div><a class="item" rel="external" href="https://www.apache.org/security/">Security</a></div><div><a class="item" rel="external" href="https://www.apache.org/licenses/">License</a></div></div></footer></div><script>window.twttr=(function(d,s, id){var js,fjs=d.getElementsByTagName(s)[0],t=window.twttr||{};if(d.getElementById(id))return t;js=d.createElement(s);js.id=id;js.src='https://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js, fjs);t._e = [];t.ready = function(f) {t._e.push(f);};return t;}(document, 'script', 'twitter-wjs'));</script></body></html>