manage-durable-subscribers.html - activemq-web - Git at Google

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <!--

     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.
 -->
 <html>
 <head>
     <link href="http://activemq.apache.org/styles/site.css" rel="stylesheet" type="text/css"/>
     <link href="http://activemq.apache.org/styles/type-settings.css" rel="stylesheet" type="text/css"/>
     <script src="http://activemq.apache.org/styles/prototype.js" type="text/javascript"></script>
     <script src="http://activemq.apache.org/styles/rico.js" type="text/javascript"></script>
     <script src="http://activemq.apache.org/styles/site.js" type="text/javascript"></script>
     <style type="text/css">
       .maincontent { overflow:hidden; }
     </style>
     <!--[if IE]>
     <style type="text/css">
       .maincontent { width:100%; }
     </style>
     <![endif]-->

           <link href='http://activemq.apache.org/styles/highlighter/styles/shCore.css' rel='stylesheet' type='text/css' />
       <link href='http://activemq.apache.org/styles/highlighter/styles/shThemeEclipse.css' rel='stylesheet' type='text/css' />
       <script src='http://activemq.apache.org/styles/highlighter/scripts/shCore.js' type='text/javascript'></script>
               <script src='http://activemq.apache.org/styles/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>

       <script type="text/javascript">
         SyntaxHighlighter.defaults['toolbar'] = false;
         SyntaxHighlighter.all();
       </script>

     <title>
     Apache ActiveMQ &#8482; -- Manage Durable Subscribers
     </title>
 </head>
 <body>
 <div class="white_box">
 <div class="header">
   <div class="header_l">
     <div class="header_r">
     </div>
   </div>
 </div>
 <div class="content">
   <div class="content_l">
     <div class="content_r">
       <div>

 <!-- Banner -->
 <div id="asf_logo">
 	<div id="activemq_logo">
      <a shape="rect" style="float:left; width:280px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:10px; margin-left:100px;" href="http://activemq.apache.org" title="The most popular and powerful open source Message Broker">ActiveMQ</a>
             <a shape="rect" style="float:right; width:210px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:15px; margin-right:10px;" href="http://www.apache.org" title="The Apache Software Foundation">ASF</a>
 	</div>
 </div>

         <div class="top_red_bar">
           <div id="site-breadcrumbs">
 <a href="features.html">Features</a>&nbsp;&gt;&nbsp;<a href="consumer-features.html">Consumer Features</a>&nbsp;&gt;&nbsp;<a href="manage-durable-subscribers.html">Manage Durable Subscribers</a>
           </div>
           <div id="site-quicklinks">
 <p><a shape="rect" href="download.html">Download</a> | <a shape="rect" class="external-link" href="http://activemq.apache.org/maven/apidocs/index.html">JavaDocs</a> <a shape="rect" href="javadocs.html">More...</a> | <a shape="rect" href="source.html">Source</a> | <a shape="rect" href="discussion-forums.html">Forums</a> | <a shape="rect" href="support.html">Support</a></p>
           </div>
         </div>

   <table border="0">
   <tbody>
         <tr>
         <td valign="top" width="100%">
 <div class="wiki-content maincontent"><p><a shape="rect" href="how-do-durable-queues-and-topics-work.html">Durable topic subscribers</a> that are offline for a long period of time are usually not desired in the system. The reason for that is that broker needs to keep all the messages sent to those topics for the said subscribers. And this message piling can over time exhaust broker store limits for example and lead to the overall slowdown of the system.</p>

 <p>You can always manually unsubscribe inactive durable subscriber using management tools like <a shape="rect" href="jmx.html">JConsole</a> or <a shape="rect" href="web-console.html">Web Console</a>, but clearly there's more that can be done to help manage systems that use durable subscribers (perhaps coming from environments that they don't control) </p>

 <p>Staring with version 5.6 we introduced a few improvements in this area.</p>

 <h3 id="ManageDurableSubscribers-Expiringmessages">Expiring messages</h3>

 <p>Some applications send message with specified time to live. If those messages are kept on the broker for the offline durable subscriber we need to remove them when they reach their expiry time. Just as we do with queues, now we check for those messages every 30 seconds by default, which can be tuned with the appropriate <a shape="rect" href="per-destination-policies.html">destination policy</a>. For example, the following entry</p>

 <div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
 <pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">&lt;policyEntry topic="&gt;" expireMessagesPeriod="300000"/&gt;</pre>
 </div></div>

 <p>will configure the broker to check for expired messages every 5 minutes.</p>

 <h3 id="ManageDurableSubscribers-Removinginactivesubscribers">Removing inactive subscribers</h3>

 <p>The other thing we can do is to automatically unsubscribe durable subscribers that are not active for some period of time. For that purpose we introduced two new broker properties:</p>

 <div class="table-wrap"><table class="confluenceTable"><tbody><tr><th colspan="1" rowspan="1" class="confluenceTh"><p>property</p></th><th colspan="1" rowspan="1" class="confluenceTh"><p>default</p></th><th colspan="1" rowspan="1" class="confluenceTh"><p>description</p></th></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p>offlineDurableSubscriberTimeout</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>-1</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Amount of time (in milliseconds) after which we remove inactive durable subs. Default -1, means don't remove them</p></td></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p>offlineDurableSubscriberTaskSchedule</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>300000</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>How often we check (in milliseconds)</p></td></tr></tbody></table></div>


 <p>An example configuration could look like</p>

 <div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
 <pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">&lt;broker name="localhost" offlineDurableSubscriberTimeout="86400000" offlineDurableSubscriberTaskSchedule="3600000"&gt;</pre>
 </div></div>

 <p>which means that we check every hour and remove subscriber that has been offline for a day.</p></div>
         </td>
         <td valign="top">
           <div class="navigation">
             <div class="navigation_top">
               <div class="navigation_bottom">
 <h3 id="Navigation-Overviewhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35985"><a shape="rect" href="overview.html">Overview</a></h3><ul class="alternate"><li><a shape="rect" href="index.html">Index</a></li><li><a shape="rect" href="news.html">News</a></li><li><a shape="rect" href="new-features.html">New Features</a></li><li><a shape="rect" href="getting-started.html">Getting Started</a></li><li><a shape="rect" href="faq.html">FAQ</a></li><li><a shape="rect" href="articles.html">Articles</a></li><li><a shape="rect" href="books.html">Books</a></li><li><a shape="rect" href="download.html">Download</a></li><li><a shape="rect" class="external-link" href="http://www.apache.org/licenses/">License</a></li></ul><h3 id="Navigation-Search">Search</h3><div>
 <form enctype="application/x-www-form-urlencoded" method="get" action="http://www.google.com/search" style="font-size: 10px;">
 <input type="hidden" name="ie" value="UTF-8">
 <input type="hidden" name="oe" value="UTF-8">
   <input maxlength="255" type="text" name="q" size="15" value="value"><br clear="none">
   <input type="submit" name="btnG" value="Search">
   <input type="hidden" name="domains" value="activemq.apache.org">
   <input type="hidden" name="sitesearch" value="activemq.apache.org">
 </form>
 </div>
 <h3 id="Navigation-SubProjects">Sub Projects</h3><ul class="alternate"><li><a shape="rect" class="external-link" href="http://activemq.apache.org/artemis/">Artemis</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/apollo" title="ActiveMQ Apollo">Apollo</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/cms/">CMS</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/" title="NMS is the .Net Messaging API">NMS</a></li></ul><h3 id="Navigation-Communityhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=36130"><a shape="rect" href="community.html">Community</a></h3><ul class="alternate"><li><a shape="rect" href="support.html">Support</a></li><li><a shape="rect" href="contributing.html">Contributing</a></li><li><a shape="rect" href="discussion-forums.html">Discussion Forums</a></li><li><a shape="rect" href="mailing-lists.html">Mailing Lists</a></li><li><a shape="rect" href="irc.html">IRC</a></li><li><a shape="rect" class="external-link" href="http://javabot.evanchooly.com/logs/%23apache-activemq/today" rel="nofollow">IRC Log</a></li><li><a shape="rect" href="security-advisories.html">Security Advisories</a></li><li><a shape="rect" href="site.html">Site</a></li><li><a shape="rect" class="external-link" href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li><li><a shape="rect" href="projects-using-activemq.html">Projects Using ActiveMQ</a></li><li><a shape="rect" href="users.html">Users</a></li><li><a shape="rect" href="team.html">Team</a></li><li><a shape="rect" href="thanks.html">Thanks</a></li></ul><h3 id="Navigation-Featureshttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35883"><a shape="rect" href="features.html">Features</a></h3><ul class="alternate"><li><a shape="rect" href="advisory-message.html">Advisory Message</a></li><li><a shape="rect" href="clustering.html">Clustering</a></li><li><a shape="rect" href="cross-language-clients.html">Cross Language Clients</a></li><li><a shape="rect" href="enterprise-integration-patterns.html">Enterprise Integration Patterns</a></li><li><a shape="rect" href="jmx.html">JMX</a></li><li><a shape="rect" href="jms-to-jms-bridge.html">JMS to JMS Bridge</a></li><li><a shape="rect" href="masterslave.html">MasterSlave</a></li><li><a shape="rect" href="message-groups.html">Message Groups</a></li><li><a shape="rect" href="networks-of-brokers.html">Networks of Brokers</a></li><li><a shape="rect" href="performance.html">Performance</a></li><li><a shape="rect" href="persistence.html">Persistence</a></li><li><a shape="rect" href="security.html">Security</a></li><li><a shape="rect" href="virtual-destinations.html">Virtual Destinations</a></li><li><a shape="rect" href="visualisation.html">Visualisation</a></li><li><a shape="rect" href="features.html">More ...</a></li></ul><h3 id="Navigation-Connectivityhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=36167"><a shape="rect" href="connectivity.html">Connectivity</a></h3><ul class="alternate"><li><a shape="rect" href="ajax.html">Ajax</a></li><li><a shape="rect" href="amqp.html">AMQP</a></li><li><a shape="rect" href="axis-and-cxf-support.html">Axis and CXF Support</a></li><li><a shape="rect" href="c-integration.html">C Integration</a></li><li><a shape="rect" href="activemq-c-clients.html">C++</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/">C# and .Net Integration</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/cms/">CMS</a></li><li><a shape="rect" href="j2ee.html">J2EE</a></li><li><a shape="rect" href="jboss-integration.html">JBoss Integration</a></li><li><a shape="rect" class="external-link" href="http://docs.codehaus.org/display/JETTY/Integrating+with+ActiveMQ" rel="nofollow">Jetty</a></li><li><a shape="rect" href="jndi-support.html">JNDI Support</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/" title="NMS is the .Net Messaging API">NMS</a></li><li><a shape="rect" href="rest.html">REST</a></li><li><a shape="rect" href="rss-and-atom.html">RSS and Atom</a></li><li><a shape="rect" href="spring-support.html">Spring Support</a></li><li><a shape="rect" href="stomp.html">Stomp</a></li><li><a shape="rect" href="tomcat.html">Tomcat</a></li><li><a shape="rect" href="unix-service.html">Unix Service</a></li><li><a shape="rect" href="weblogic-integration.html">WebLogic Integration</a></li><li><a shape="rect" href="xmpp.html">XMPP</a></li><li><a shape="rect" href="connectivity.html">More ...</a></li></ul><h3 id="Navigation-UsingActiveMQ5https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=71176"><a shape="rect" href="using-activemq-5.html">Using ActiveMQ 5</a></h3><ul class="alternate"><li><a shape="rect" href="version-5-getting-started.html">Getting Started</a></li><li><a shape="rect" href="version-5-initial-configuration.html">Initial Configuration</a></li><li><a shape="rect" href="version-5-run-broker.html">Running a Broker</a></li><li><a shape="rect" href="how-do-i-embed-a-broker-inside-a-connection.html">Embedded Brokers</a></li><li><a shape="rect" href="activemq-command-line-tools-reference.html">Command Line Tools</a></li><li><a shape="rect" href="configuring-version-5-transports.html">Configuring Transports</a></li><li><a shape="rect" href="version-5-examples.html">Examples</a></li><li><a shape="rect" href="version-5-web-samples.html">Web Samples</a></li><li><a shape="rect" href="how-can-i-monitor-activemq.html">Monitoring the Broker</a></li><li><a shape="rect" href="version-5-xml-configuration.html">Xml Configuration</a></li><li><a shape="rect" href="xml-reference.html">Xml Reference</a></li><li><a shape="rect" href="using-activemq-5.html">More ...</a></li></ul><h3 id="Navigation-Toolshttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35912"><a shape="rect" href="tools.html">Tools</a></h3><ul class="alternate"><li><a shape="rect" href="web-console.html">Web Console</a></li><li><a shape="rect" href="activemq-performance-module-users-manual.html">Maven2 Performance Plugin</a></li></ul><h3 id="Navigation-Supporthttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35919"><a shape="rect" href="support.html">Support</a></h3><ul class="alternate"><li><a shape="rect" class="external-link" href="http://issues.apache.org/jira/browse/AMQ">Issues</a></li><li><a shape="rect" class="external-link" href="http://issues.apache.org/activemq/browse/AMQ?report=com.atlassian.jira.plugin.system.project:roadmap-panel">Roadmap</a></li><li><a shape="rect" class="external-link" href="http://issues.apache.org/activemq/browse/AMQ?report=com.atlassian.jira.plugin.system.project:changelog-panel">Change log</a></li></ul><h3 id="Navigation-Developershttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35903"><a shape="rect" href="developers.html">Developers</a></h3><ul class="alternate"><li><a shape="rect" href="source.html">Source</a></li><li><a shape="rect" href="building.html">Building</a></li><li><a shape="rect" href="developer-guide.html">Developer Guide</a></li><li><a shape="rect" href="becoming-a-committer.html">Becoming a committer</a></li><li><a shape="rect" href="code-overview.html">Code Overview</a></li><li><a shape="rect" href="wire-protocol.html">Wire Protocol</a></li><li><a shape="rect" href="release-guide.html">Release Guide</a></li></ul><h3 id="Navigation-Tests">Tests</h3><ul class="alternate"><li><a shape="rect" href="activemq-performance-module-users-manual.html">Maven2 Performance Plugin</a></li><li><a shape="rect" href="benchmark-tests.html">Benchmark Tests</a></li><li><a shape="rect" href="jmeter-system-tests.html">JMeter System Tests</a></li><li><a shape="rect" href="jmeter-performance-tests.html">JMeter Performance Tests</a></li><li><a shape="rect" href="integration-tests.html">Integration Tests</a></li></ul><h3 id="Navigation-ProjectReports">Project Reports</h3><ul class="alternate"><li><a shape="rect" href="junit-reports.html">JUnit Reports</a></li><li><a shape="rect" href="source-xref.html">Source XRef</a></li><li><a shape="rect" href="test-source-xref.html">Test Source XRef</a></li><li><a shape="rect" href="xml-reference.html">Xml Reference</a></li></ul>
               </div>
             </div>
           </div>
         </td>
         </tr>
   </tbody>
         </table>
         <div class="bottom_red_bar"></div>
       </div>
     </div>
   </div>
 </div>
 <div class="black_box">
 <div class="footer">
   <div class="footer_l">
     <div class="footer_r">
       <div>
         <a href="http://activemq.apache.org/privacy-policy.html">Privacy Policy</a> -
         (<a href="https://cwiki.apache.org/confluence/pages/editpage.action?pageId=27822189">edit this page</a>)
       </div>
     </div>
   </div>
 </div>
 </div>
 </div>
 <div class="design_attribution">
 &copy; 2004-2011 The Apache Software Foundation.
 <br/>
 Apache ActiveMQ, ActiveMQ, Apache, the Apache feather logo, and the Apache ActiveMQ project logo are trademarks of The Apache Software Foundation.  All other marks mentioned may be trademarks or registered trademarks of their respective owners.
 <br/>
 <a href="http://hiramchirino.com">Graphic Design By Hiram</a>
 </div>

 <!-- delay the loading of large javascript files to the end so that they don't interfere with the loading of page content -->
 <span style="display: none">
   <script type="text/javascript">
     var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
     document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
   </script>
   <script type="text/javascript">
     var pageTracker = _gat._getTracker("UA-1347593-1");
     pageTracker._initData();
     pageTracker._trackPageview();
   </script>
 </span>
 </body>
 </html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	<!--

	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.
	-->
	<html>
	<head>
	<link href="http://activemq.apache.org/styles/site.css" rel="stylesheet" type="text/css"/>
	<link href="http://activemq.apache.org/styles/type-settings.css" rel="stylesheet" type="text/css"/>
	<script src="http://activemq.apache.org/styles/prototype.js" type="text/javascript"></script>
	<script src="http://activemq.apache.org/styles/rico.js" type="text/javascript"></script>
	<script src="http://activemq.apache.org/styles/site.js" type="text/javascript"></script>
	<style type="text/css">
	.maincontent { overflow:hidden; }
	</style>
	<!--[if IE]>
	<style type="text/css">
	.maincontent { width:100%; }
	</style>
	<![endif]-->

	<link href='http://activemq.apache.org/styles/highlighter/styles/shCore.css' rel='stylesheet' type='text/css' />
	<link href='http://activemq.apache.org/styles/highlighter/styles/shThemeEclipse.css' rel='stylesheet' type='text/css' />
	<script src='http://activemq.apache.org/styles/highlighter/scripts/shCore.js' type='text/javascript'></script>
	<script src='http://activemq.apache.org/styles/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>

	<script type="text/javascript">
	SyntaxHighlighter.defaults['toolbar'] = false;
	SyntaxHighlighter.all();
	</script>

	<title>
	Apache ActiveMQ ™ -- Manage Durable Subscribers
	</title>
	</head>
	<body>
	<div class="white_box">
	<div class="header">
	<div class="header_l">
	<div class="header_r">
	</div>
	</div>
	</div>
	<div class="content">
	<div class="content_l">
	<div class="content_r">
	<div>

	<!-- Banner -->
	<div id="asf_logo">
	<div id="activemq_logo">
	<a shape="rect" style="float:left; width:280px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:10px; margin-left:100px;" href="http://activemq.apache.org" title="The most popular and powerful open source Message Broker">ActiveMQ</a>
	<a shape="rect" style="float:right; width:210px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:15px; margin-right:10px;" href="http://www.apache.org" title="The Apache Software Foundation">ASF</a>
	</div>
	</div>

	<div class="top_red_bar">
	<div id="site-breadcrumbs">
	<a href="features.html">Features</a> > <a href="consumer-features.html">Consumer Features</a> > <a href="manage-durable-subscribers.html">Manage Durable Subscribers</a>
	</div>
	<div id="site-quicklinks">
	<p><a shape="rect" href="download.html">Download</a> \| <a shape="rect" class="external-link" href="http://activemq.apache.org/maven/apidocs/index.html">JavaDocs</a> <a shape="rect" href="javadocs.html">More...</a> \| <a shape="rect" href="source.html">Source</a> \| <a shape="rect" href="discussion-forums.html">Forums</a> \| <a shape="rect" href="support.html">Support</a></p>
	</div>
	</div>

	<table border="0">
	<tbody>
	<tr>
	<td valign="top" width="100%">
	<div class="wiki-content maincontent"><p><a shape="rect" href="how-do-durable-queues-and-topics-work.html">Durable topic subscribers</a> that are offline for a long period of time are usually not desired in the system. The reason for that is that broker needs to keep all the messages sent to those topics for the said subscribers. And this message piling can over time exhaust broker store limits for example and lead to the overall slowdown of the system.</p>

	<p>You can always manually unsubscribe inactive durable subscriber using management tools like <a shape="rect" href="jmx.html">JConsole</a> or <a shape="rect" href="web-console.html">Web Console</a>, but clearly there's more that can be done to help manage systems that use durable subscribers (perhaps coming from environments that they don't control) </p>

	<p>Staring with version 5.6 we introduced a few improvements in this area.</p>

	<h3 id="ManageDurableSubscribers-Expiringmessages">Expiring messages</h3>

	<p>Some applications send message with specified time to live. If those messages are kept on the broker for the offline durable subscriber we need to remove them when they reach their expiry time. Just as we do with queues, now we check for those messages every 30 seconds by default, which can be tuned with the appropriate <a shape="rect" href="per-destination-policies.html">destination policy</a>. For example, the following entry</p>

	<div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
	<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"><policyEntry topic=">" expireMessagesPeriod="300000"/></pre>
	</div></div>

	<p>will configure the broker to check for expired messages every 5 minutes.</p>

	<h3 id="ManageDurableSubscribers-Removinginactivesubscribers">Removing inactive subscribers</h3>

	<p>The other thing we can do is to automatically unsubscribe durable subscribers that are not active for some period of time. For that purpose we introduced two new broker properties:</p>

	<div class="table-wrap"><table class="confluenceTable"><tbody><tr><th colspan="1" rowspan="1" class="confluenceTh"><p>property</p></th><th colspan="1" rowspan="1" class="confluenceTh"><p>default</p></th><th colspan="1" rowspan="1" class="confluenceTh"><p>description</p></th></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p>offlineDurableSubscriberTimeout</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>-1</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Amount of time (in milliseconds) after which we remove inactive durable subs. Default -1, means don't remove them</p></td></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p>offlineDurableSubscriberTaskSchedule</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>300000</p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>How often we check (in milliseconds)</p></td></tr></tbody></table></div>


	<p>An example configuration could look like</p>

	<div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
	<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"><broker name="localhost" offlineDurableSubscriberTimeout="86400000" offlineDurableSubscriberTaskSchedule="3600000"></pre>
	</div></div>

	<p>which means that we check every hour and remove subscriber that has been offline for a day.</p></div>
	</td>
	<td valign="top">
	<div class="navigation">
	<div class="navigation_top">
	<div class="navigation_bottom">
	<h3 id="Navigation-Overviewhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35985"><a shape="rect" href="overview.html">Overview</a></h3><ul class="alternate"><li><a shape="rect" href="index.html">Index</a></li><li><a shape="rect" href="news.html">News</a></li><li><a shape="rect" href="new-features.html">New Features</a></li><li><a shape="rect" href="getting-started.html">Getting Started</a></li><li><a shape="rect" href="faq.html">FAQ</a></li><li><a shape="rect" href="articles.html">Articles</a></li><li><a shape="rect" href="books.html">Books</a></li><li><a shape="rect" href="download.html">Download</a></li><li><a shape="rect" class="external-link" href="http://www.apache.org/licenses/">License</a></li></ul><h3 id="Navigation-Search">Search</h3><div>
	<form enctype="application/x-www-form-urlencoded" method="get" action="http://www.google.com/search" style="font-size: 10px;">
	<input type="hidden" name="ie" value="UTF-8">
	<input type="hidden" name="oe" value="UTF-8">
	<input maxlength="255" type="text" name="q" size="15" value="value"><br clear="none">
	<input type="submit" name="btnG" value="Search">
	<input type="hidden" name="domains" value="activemq.apache.org">
	<input type="hidden" name="sitesearch" value="activemq.apache.org">
	</form>
	</div>
	<h3 id="Navigation-SubProjects">Sub Projects</h3><ul class="alternate"><li><a shape="rect" class="external-link" href="http://activemq.apache.org/artemis/">Artemis</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/apollo" title="ActiveMQ Apollo">Apollo</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/cms/">CMS</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/" title="NMS is the .Net Messaging API">NMS</a></li></ul><h3 id="Navigation-Communityhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=36130"><a shape="rect" href="community.html">Community</a></h3><ul class="alternate"><li><a shape="rect" href="support.html">Support</a></li><li><a shape="rect" href="contributing.html">Contributing</a></li><li><a shape="rect" href="discussion-forums.html">Discussion Forums</a></li><li><a shape="rect" href="mailing-lists.html">Mailing Lists</a></li><li><a shape="rect" href="irc.html">IRC</a></li><li><a shape="rect" class="external-link" href="http://javabot.evanchooly.com/logs/%23apache-activemq/today" rel="nofollow">IRC Log</a></li><li><a shape="rect" href="security-advisories.html">Security Advisories</a></li><li><a shape="rect" href="site.html">Site</a></li><li><a shape="rect" class="external-link" href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li><li><a shape="rect" href="projects-using-activemq.html">Projects Using ActiveMQ</a></li><li><a shape="rect" href="users.html">Users</a></li><li><a shape="rect" href="team.html">Team</a></li><li><a shape="rect" href="thanks.html">Thanks</a></li></ul><h3 id="Navigation-Featureshttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35883"><a shape="rect" href="features.html">Features</a></h3><ul class="alternate"><li><a shape="rect" href="advisory-message.html">Advisory Message</a></li><li><a shape="rect" href="clustering.html">Clustering</a></li><li><a shape="rect" href="cross-language-clients.html">Cross Language Clients</a></li><li><a shape="rect" href="enterprise-integration-patterns.html">Enterprise Integration Patterns</a></li><li><a shape="rect" href="jmx.html">JMX</a></li><li><a shape="rect" href="jms-to-jms-bridge.html">JMS to JMS Bridge</a></li><li><a shape="rect" href="masterslave.html">MasterSlave</a></li><li><a shape="rect" href="message-groups.html">Message Groups</a></li><li><a shape="rect" href="networks-of-brokers.html">Networks of Brokers</a></li><li><a shape="rect" href="performance.html">Performance</a></li><li><a shape="rect" href="persistence.html">Persistence</a></li><li><a shape="rect" href="security.html">Security</a></li><li><a shape="rect" href="virtual-destinations.html">Virtual Destinations</a></li><li><a shape="rect" href="visualisation.html">Visualisation</a></li><li><a shape="rect" href="features.html">More ...</a></li></ul><h3 id="Navigation-Connectivityhttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=36167"><a shape="rect" href="connectivity.html">Connectivity</a></h3><ul class="alternate"><li><a shape="rect" href="ajax.html">Ajax</a></li><li><a shape="rect" href="amqp.html">AMQP</a></li><li><a shape="rect" href="axis-and-cxf-support.html">Axis and CXF Support</a></li><li><a shape="rect" href="c-integration.html">C Integration</a></li><li><a shape="rect" href="activemq-c-clients.html">C++</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/">C# and .Net Integration</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/cms/">CMS</a></li><li><a shape="rect" href="j2ee.html">J2EE</a></li><li><a shape="rect" href="jboss-integration.html">JBoss Integration</a></li><li><a shape="rect" class="external-link" href="http://docs.codehaus.org/display/JETTY/Integrating+with+ActiveMQ" rel="nofollow">Jetty</a></li><li><a shape="rect" href="jndi-support.html">JNDI Support</a></li><li><a shape="rect" class="external-link" href="http://activemq.apache.org/nms/" title="NMS is the .Net Messaging API">NMS</a></li><li><a shape="rect" href="rest.html">REST</a></li><li><a shape="rect" href="rss-and-atom.html">RSS and Atom</a></li><li><a shape="rect" href="spring-support.html">Spring Support</a></li><li><a shape="rect" href="stomp.html">Stomp</a></li><li><a shape="rect" href="tomcat.html">Tomcat</a></li><li><a shape="rect" href="unix-service.html">Unix Service</a></li><li><a shape="rect" href="weblogic-integration.html">WebLogic Integration</a></li><li><a shape="rect" href="xmpp.html">XMPP</a></li><li><a shape="rect" href="connectivity.html">More ...</a></li></ul><h3 id="Navigation-UsingActiveMQ5https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=71176"><a shape="rect" href="using-activemq-5.html">Using ActiveMQ 5</a></h3><ul class="alternate"><li><a shape="rect" href="version-5-getting-started.html">Getting Started</a></li><li><a shape="rect" href="version-5-initial-configuration.html">Initial Configuration</a></li><li><a shape="rect" href="version-5-run-broker.html">Running a Broker</a></li><li><a shape="rect" href="how-do-i-embed-a-broker-inside-a-connection.html">Embedded Brokers</a></li><li><a shape="rect" href="activemq-command-line-tools-reference.html">Command Line Tools</a></li><li><a shape="rect" href="configuring-version-5-transports.html">Configuring Transports</a></li><li><a shape="rect" href="version-5-examples.html">Examples</a></li><li><a shape="rect" href="version-5-web-samples.html">Web Samples</a></li><li><a shape="rect" href="how-can-i-monitor-activemq.html">Monitoring the Broker</a></li><li><a shape="rect" href="version-5-xml-configuration.html">Xml Configuration</a></li><li><a shape="rect" href="xml-reference.html">Xml Reference</a></li><li><a shape="rect" href="using-activemq-5.html">More ...</a></li></ul><h3 id="Navigation-Toolshttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35912"><a shape="rect" href="tools.html">Tools</a></h3><ul class="alternate"><li><a shape="rect" href="web-console.html">Web Console</a></li><li><a shape="rect" href="activemq-performance-module-users-manual.html">Maven2 Performance Plugin</a></li></ul><h3 id="Navigation-Supporthttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35919"><a shape="rect" href="support.html">Support</a></h3><ul class="alternate"><li><a shape="rect" class="external-link" href="http://issues.apache.org/jira/browse/AMQ">Issues</a></li><li><a shape="rect" class="external-link" href="http://issues.apache.org/activemq/browse/AMQ?report=com.atlassian.jira.plugin.system.project:roadmap-panel">Roadmap</a></li><li><a shape="rect" class="external-link" href="http://issues.apache.org/activemq/browse/AMQ?report=com.atlassian.jira.plugin.system.project:changelog-panel">Change log</a></li></ul><h3 id="Navigation-Developershttps://cwiki.apache.org/confluence/pages/viewpage.action?pageId=35903"><a shape="rect" href="developers.html">Developers</a></h3><ul class="alternate"><li><a shape="rect" href="source.html">Source</a></li><li><a shape="rect" href="building.html">Building</a></li><li><a shape="rect" href="developer-guide.html">Developer Guide</a></li><li><a shape="rect" href="becoming-a-committer.html">Becoming a committer</a></li><li><a shape="rect" href="code-overview.html">Code Overview</a></li><li><a shape="rect" href="wire-protocol.html">Wire Protocol</a></li><li><a shape="rect" href="release-guide.html">Release Guide</a></li></ul><h3 id="Navigation-Tests">Tests</h3><ul class="alternate"><li><a shape="rect" href="activemq-performance-module-users-manual.html">Maven2 Performance Plugin</a></li><li><a shape="rect" href="benchmark-tests.html">Benchmark Tests</a></li><li><a shape="rect" href="jmeter-system-tests.html">JMeter System Tests</a></li><li><a shape="rect" href="jmeter-performance-tests.html">JMeter Performance Tests</a></li><li><a shape="rect" href="integration-tests.html">Integration Tests</a></li></ul><h3 id="Navigation-ProjectReports">Project Reports</h3><ul class="alternate"><li><a shape="rect" href="junit-reports.html">JUnit Reports</a></li><li><a shape="rect" href="source-xref.html">Source XRef</a></li><li><a shape="rect" href="test-source-xref.html">Test Source XRef</a></li><li><a shape="rect" href="xml-reference.html">Xml Reference</a></li></ul>
	</div>
	</div>
	</div>
	</td>
	</tr>
	</tbody>
	</table>
	<div class="bottom_red_bar"></div>
	</div>
	</div>
	</div>
	</div>
	<div class="black_box">
	<div class="footer">
	<div class="footer_l">
	<div class="footer_r">
	<div>
	<a href="http://activemq.apache.org/privacy-policy.html">Privacy Policy</a> -
	(<a href="https://cwiki.apache.org/confluence/pages/editpage.action?pageId=27822189">edit this page</a>)
	</div>
	</div>
	</div>
	</div>
	</div>
	</div>
	<div class="design_attribution">
	© 2004-2011 The Apache Software Foundation.
	<br/>
	Apache ActiveMQ, ActiveMQ, Apache, the Apache feather logo, and the Apache ActiveMQ project logo are trademarks of The Apache Software Foundation. All other marks mentioned may be trademarks or registered trademarks of their respective owners.
	<br/>
	<a href="http://hiramchirino.com">Graphic Design By Hiram</a>
	</div>

	<!-- delay the loading of large javascript files to the end so that they don't interfere with the loading of page content -->
	<span style="display: none">
	<script type="text/javascript">
	var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
	document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
	</script>
	<script type="text/javascript">
	var pageTracker = _gat._getTracker("UA-1347593-1");
	pageTracker._initData();
	pageTracker._trackPageview();
	</script>
	</span>
	</body>
	</html>