[jboss-user] [Clustering/JBoss] - NPE with SSO in cluster

[prabhat.jha@jboss.com]

I have a 2-node cluster with EAP 4.3 CP04 running portal with apache mod_jk in front. I have turned on org.jboss.web.tomcat.service.sso.ClusteredSingleSignOn in jboss-web.deployer. When failover happens, I see following in server log:

4:59:18,550 ERROR [TreeCacheSSOClusterManager] Caught exception cleaning sessions from dead cluster members from SSOs
  | java.lang.NullPointerException
  |        at org.jboss.web.tomcat.service.sso.TreeCacheSSOClusterManager$DeadMemberCleaner.run(TreeCacheSSOClusterManager.java:1493)
  |        at org.jboss.util.threadpool.RunnableTaskWrapper.run(RunnableTaskWrapper.java:148)
  |        at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:756)
  |        at java.lang.Thread.run(Thread.java:595)
  | 

Thanks for creating https://jira.jboss.org/jira/browse/JBPAPP-1865. What could be the cause? 

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