How does hazelcast work with openfire?

Jules_Huang · March 3, 2014, 10:12pm

In our process of testing the new hazelcast plugin 1.2.0 with openfire 3.9.1 we tried to bring down openfire service of one of the nodes. I have three nodes. Node1 is stand alone, Node2 (with the last stanza IP 160) and Node3 (with the last stanza IP 159) are a cluster.

I setup the server to server communication between Node and and the Node2/3 Cluster. I noticed the following:

On Node1 I have usr1, Node2 usr2 and Node3 usr3. I noticed that usr2 and usr3 were recognized as usr2@node3 and usr3@node3. Why?

When I shut down the openfire service of Node3, the server to server communication between Node1 and the cluster was lost. When I shut down Node2 instead the server to server communication worked fine. I was surprised by that. I was expecting the server to server communication to stay up.

Initially I though it has something to do with which Node was recognized as the older Node but after restarting the nodes in different sequence i ruled that out.

I also noticed that after a few shut down of the openfire services the openfire admin console displayed the following exception when I treid to access Server Sessions:

java.lang.NullPointerException

at java.util.concurrent.ConcurrentHashMap.hash(Unknown Source)

at java.util.concurrent.ConcurrentHashMap.remove(Unknown Source)

at org.jivesoftware.openfire.SessionManager.removeSession(SessionManager.java:1110 )

at com.jivesoftware.openfire.session.RemoteSession.doSynchronousClusterTask(Remote Session.java:175)

at com.jivesoftware.openfire.session.RemoteSession.isSecure(RemoteSession.java:132 )

at org.jivesoftware.openfire.admin.server_002dsession_002dsummary_jsp._jspService( server_002dsession_002dsummary_jsp.java:309)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1359)

at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:11 8)

at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingF ilter.java:50)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:22 7)

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:94 1)

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186 )

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875 )

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)

at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandler Collection.java:250)

at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.jav a:149)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)

at org.eclipse.jetty.server.Server.handle(Server.java:349)

at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)

at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConne ction.java:919)

at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)

at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)

at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51 )

at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.jav a:586)

at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java :44)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598 )

at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)

at java.lang.Thread.run(Unknown Source)

Jules_Huang · March 3, 2014, 10:22pm

I suspect the Exception was caused by the server to server communication was closed. I had the opeion as “Close connections after they have been idle for 10 minutes”.

Jules_Huang · March 17, 2014, 3:49pm

Both openfire servers of mine are on VMs on the same server. I checked that openfire seemed to be confused by that. Under Server => Server Informatin => Server Properties both have the same Server Name, chat01 though Under Environment they have correct Host names chat01 and chat02.

Chad_Kotil · September 5, 2014, 1:48pm

I see a simliar error when trying to view current user or server sessions in a 3 node hazelcast cluster.

java.lang.NullPointerException

at com.jivesoftware.openfire.session.RemoteSession.doSynchronousClusterTask(Remote Session.java:175)

at com.jivesoftware.openfire.session.RemoteSession.isSecure(RemoteSession.java:132 )

at org.jivesoftware.openfire.admin.server_002dsession_002dsummary_jsp._jspService( server_002dsession_002dsummary_jsp.java:303)