WebLogic Cluster

Before You Start

You have to configure the following setting for ZK and Weblogic.

zk.xml

• Turn on Serializable UI Factory for ZK, please refer to this documentation.

<zk>
	<system-config>
		<ui-factory-class>org.zkoss.zk.ui.http.SerializableUiFactory</ui-factory-class>
	</system-config>
</zk>

• Comment out this, if any. (by default, we use SessionDesktopCacheProvider and it works well)

<system-config>
    <cache-provider-class>org.zkoss.zk.ui.sys.GlobalDesktopCacheProvider</cache-provider-class>
</system-config>

Note: we cannot use GlobaDesktopCacheProvider for Cluster because it is stored at ServletContext scope not Session scope. In other words, if one server fails, then the cluster will try to replicate the session across different server, so the data we stored in ServletContext won't transfer to others.

weblogic.xml

• Add a weblogic.xml under XXX/WEB-INF folder(XXX is like ZKsandbox in the war file)

For example,

<!DOCTYPE weblogic-web-app PUBLIC "-//BEA Systems, Inc.//DTD Web Application 8.1//EN" "http://www.bea.com/servers/wls810/dtd/weblogic810-web-jar.dtd">

<weblogic-web-app>
  <session-descriptor>
    <session-param>
      <param-name>PersistentStoreType</param-name>
      <param-value>replicated</param-value>
    </session-param>
  </session-descriptor>
</weblogic-web-app>

As mentioned in Weblogic's document

replicated — Same as memory, but session data is replicated across the clustered servers.

Setting up Weblogic Clusters

After those things done above, please follow the official document to set up a Weblogic Cluster Server here.

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