WARN "Possible concurrency problem: Replicated version id XX .... in-memory version for session" in JBoss EAP cluster

Solution Verified - Updated -

Issue

  • We got similar WARN log message in server.log:

    • EAP 4.x/5.x:
    Possible concurrency problem: Replicated version id 123 matches in-memory version for session ABCDEFGHIJKLMNOPQRSTUV**
    
    WARN  [org.jboss.web.tomcat.service.session.distributedcache.impl.jbc.CacheListener] (Incoming-191.168.100.100:55200) Possible concurrency problem: Replicated version id XXX is less than or equal to in-memory version for session ABCDEFGHIJKLMNOPQRSTUV__
    
    • EAP 6.x:
    JBAS010325: Possible concurrency problem: Replicated version id 123 is less than or equal to in-memory version for session ABCDEFGHIJKLMNOPQRSTUV**
    
  • Frequent Infinispan errors in JBoss EAP 6.4.0 server.log

    2019-06-17 09:27:41,644 WARN [org.jboss.as.clustering.web.infinispan] (Incoming-9,shared=tcpping) JBAS010325: Possible concurrency problem: Replicated version id 227 is less than or equal to in-memory version for session i82GSVen9H9-jKpGu3uwwcpU
    

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 4.x
    • 5.x
    • 6.x

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