| <html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat Configuration Reference (6.0.39) - The ClusterManager object</title><meta name="author" content="Filip Hanik"><style type="text/css" media="print"> | |
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| " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.39, Jan 27 2014</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap="nowrap" class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>Other</strong></p><ul><li><a href="filter.html">Filter</a></li><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Apache Tomcat Configuration Reference</h1><h2>The ClusterManager object</h2><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote> | |
| <ul><li><a href="#Introduction">Introduction</a></li><li><a href="#The_<Manager>">The <Manager></a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#org.apache.catalina.ha.session.DeltaManager_Attributes">org.apache.catalina.ha.session.DeltaManager Attributes</a></li><li><a href="#org.apache.catalina.ha.session.BackupManager_Attributes">org.apache.catalina.ha.session.BackupManager Attributes</a></li></ol></li></ul> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote> | |
| <p>A cluster manager is an extension to Tomcat's session manager interface, | |
| <code>org.apache.catalina.Manager</code>. | |
| A cluster manager must implement the | |
| <code>org.apache.catalina.ha.ClusterManager</code> and is solely responsible | |
| for how the session is replicated.<br> | |
| There are currently two different managers, the | |
| <code>org.apache.catalina.ha.session.DeltaManager</code> replicates deltas of | |
| session data to all members in the cluster. This implementation is proven and | |
| works very well, but has a limitation as it requires the cluster members to be | |
| homogeneous, all nodes must deploy the same applications and be exact | |
| replicas. The <code>org.apache.catalina.ha.session.BackupManager</code> also | |
| replicates deltas but only to one backup node. The location of the backup node | |
| is known to all nodes in the cluster. It also supports heterogeneous | |
| deployments, so the manager knows at what locations the web application is | |
| deployed.</p> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="The <Manager>"><!--()--></a><a name="The_<Manager>"><strong>The <Manager></strong></a></font></td></tr><tr><td><blockquote> | |
| <p>The <code><Manager></code> element defined inside the | |
| <code><Cluster></code> element is the template defined for all web | |
| applications that are marked <code><distributable/></code> in their | |
| <code>web.xml</code> file. However, you can still override the manager | |
| implementation on a per web application basis, by putting the | |
| <code><Manager></code> inside the <code><Context></code> element | |
| either in the <code><a href="context.html">context.xml</a></code> file or the | |
| <code><a href="index.html">server.xml</a></code> file.</p> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Common Attributes"><!--()--></a><a name="Common_Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><strong><code>className</code></strong></td><td align="left" valign="center"> | |
| </td></tr><tr><td align="left" valign="center"><code>name</code></td><td align="left" valign="center"> | |
| <b>The name of this cluster manager, the name is used to identify a | |
| session manager on a node. The name might get modified by the | |
| <code>Cluster</code> element to make it unique in the container.</b> | |
| </td></tr><tr><td align="left" valign="center"><code>defaultMode</code></td><td align="left" valign="center"> | |
| <b>Deprecated since 6.0.0</b> | |
| </td></tr><tr><td align="left" valign="center"><code>notifyListenersOnReplication</code></td><td align="left" valign="center"> | |
| Set to <code>true</code> if you wish to have session listeners notified | |
| when session attributes are being replicated or removed across Tomcat | |
| nodes in the cluster. | |
| </td></tr><tr><td align="left" valign="center"><code>expireSessionsOnShutdown</code></td><td align="left" valign="center"> | |
| When a web application is being shutdown, Tomcat issues an expire call | |
| to each session to notify all the listeners. If you wish for all | |
| sessions to expire on all nodes when a shutdown occurs on one node, set | |
| this value to <code>true</code>. Default value is <code>false</code>. | |
| </td></tr></table> | |
| </blockquote></td></tr></table> | |
| <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="org.apache.catalina.ha.session.DeltaManager Attributes"><!--()--></a><a name="org.apache.catalina.ha.session.DeltaManager_Attributes"><strong>org.apache.catalina.ha.session.DeltaManager Attributes</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code>domainReplication</code></td><td align="left" valign="center"> | |
| <b>Deprecated since 6.0.0</b><br> | |
| If you wish sessions to be replicated only to members that have the | |
| same logical domain set, use | |
| <code><a href="cluster-interceptor.html">DomainFilterInterceptor </a></code>. | |
| </td></tr><tr><td align="left" valign="center"><code>expireSessionsOnShutdown</code></td><td align="left" valign="center"> | |
| When a web application is being shutdown, Tomcat issues an expire call | |
| to each session to notify all the listeners. If you wish for all | |
| sessions to expire on all nodes when a shutdown occurs on one node, set | |
| this value to <code>true</code>. | |
| Default value is <code>false</code>. | |
| </td></tr><tr><td align="left" valign="center"><code>maxActiveSessions</code></td><td align="left" valign="center"> | |
| The maximum number of active sessions that will be created by this | |
| Manager, or -1 (the default) for no limit. For this manager, all | |
| sessions are counted as active sessions irrespective if whether or not | |
| the current node is the primary node for the session. | |
| </td></tr><tr><td align="left" valign="center"><code>notifySessionListenersOnReplication</code></td><td align="left" valign="center"> | |
| Set to <code>true</code> if you wish to have session listeners notified | |
| when sessions are created and expired across Tomcat nodes in the | |
| cluster. | |
| </td></tr><tr><td align="left" valign="center"><code>notifyContainerListenersOnReplication</code></td><td align="left" valign="center"> | |
| Set to <code>true</code> if you wish to have container listeners notified | |
| across Tomcat nodes in the cluster. | |
| </td></tr><tr><td align="left" valign="center"><code>stateTransferTimeout</code></td><td align="left" valign="center"> | |
| The time in seconds to wait for a session state transfer to complete | |
| from another node when a node is starting up. | |
| Default value is <code>60</code> seconds. | |
| </td></tr><tr><td align="left" valign="center"><code>sessionAttributeFilter</code></td><td align="left" valign="center"> | |
| A regular expression used to filter, which session attributes will | |
| be replicated. An attribute will only be replicated, if its name | |
| matches this pattern. If the pattern is not set (default), all | |
| attributes are eligible for replication. As an example, the value | |
| <code>^(userName|sessionHistory)$</code> will only replicate the two | |
| session attributes named <code>userName</code> and | |
| <code>sessionHistory</code>. | |
| </td></tr></table> | |
| </blockquote></td></tr></table> | |
| <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="org.apache.catalina.ha.session.BackupManager Attributes"><!--()--></a><a name="org.apache.catalina.ha.session.BackupManager_Attributes"><strong>org.apache.catalina.ha.session.BackupManager Attributes</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code>mapSendOptions</code></td><td align="left" valign="center"> | |
| The backup manager uses a replicated map, this map is sending and | |
| receiving messages. You can setup the flag for how this map is sending | |
| messages, the default value is <code>6</code>(synchronous).<br> | |
| Note that if you use asynchronous messaging it is possible for update | |
| messages for a session to be processed by the receiving node in a | |
| different order to the order in which they were sent. | |
| </td></tr><tr><td align="left" valign="center"><code>maxActiveSessions</code></td><td align="left" valign="center"> | |
| The maximum number of active sessions that will be created by this | |
| Manager, or -1 (the default) for no limit. For this manager, only | |
| sessions where the current node is the primary node for the session are | |
| considered active sessions. | |
| </td></tr><tr><td align="left" valign="center"><code>rpcTimeout</code></td><td align="left" valign="center"> | |
| Timeout for RPC message used for broadcast and transfer state from | |
| another map. | |
| Default value is <code>15000</code> milliseconds. | |
| </td></tr></table> | |
| </blockquote></td></tr></table> | |
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