[jboss-user] [Clustering/JBoss] - Exception in JNDI lookup based on partition and Udp group

[mohitanchlia]

Here is the lookup code:


  | 
  |             properties.put("jnp.partitionName", getSystemConfig().getBackendPartition());
  |             properties.put("jnp.discoveryGroup", getSystemConfig().getBackendUdpGroup());
  |             try {
  |                 this.backEndCtx = new InitialContext(properties);
  |                 this.backEndCtx.lookup(jndiName);
  |       ......
  | 

Exception

javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
....
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
        at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:381)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
        at java.lang.Thread.run(Thread.java:595)
Caused by: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
        at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1319)
        at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1436)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:596)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:589)
        at javax.naming.InitialContext.lookup(InitialContext.java:351)
        at com.intuit.engine.efp.efe.util.ServiceLocator.lookupBackEndJndi(ServiceLocator.java:469)
        ... 24 more
Caused by: java.net.SocketTimeoutException: Receive timed out
        at java.net.PlainDatagramSocketImpl.receive0(Native Method)
        at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
        at java.net.DatagramSocket.receive(DatagramSocket.java:712)
        at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1289)
        ... 29 more


We have a backend cluster and frontend cluster. So when request comes in frontend cluster does above lookup on one of the beans. When backend cluster comes back up and is completely operational, and at that point if I do a lookup I get below exception. However, on next retry it succeeds. It happens consistently. I don't understand why that should occur because I try to lookup after backend is completely up and has starting processing requests.

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