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JBoss EAP のログに "org.jboss.cache.lock.TimeoutException: Timed out waiting for flush to unblock" と表示されます

Solution Verified - Updated -

Issue

  • 連続したフルガベージコレクション (GC) アクティビティや OutOfMemoryErrors (OOME)により、EAP インスタンスがリクエストへの応答を停止すると、他のノードのログに次の WARN メッセージが継続して表示されます。
    WARN  [org.jboss.web.tomcat.service.session.InstantSnapshotManager./myapp] (http-xxx-1) Failed to replicate session ABCDEFGHIJKLMNOPQRSTUV__.node1
    java.lang.RuntimeException:Continued to catch TimeoutException during 3 retry attempts.Giving up.
     at org.jboss.web.tomcat.service.session.distributedcache.impl.jbc.JBossCacheWrapper.put(JBossCacheWrapper.java:175)
     at org.jboss.web.tomcat.service.session.distributedcache.impl.jbc.AbstractJBossCacheService.storeSessionData(AbstractJBossCacheService.java:409)
     at org.jboss.web.tomcat.service.session.ClusteredSession.processSessionReplication(ClusteredSession.java:1192)
     at org.jboss.web.tomcat.service.session.JBossCacheManager.processSessionRepl(JBossCacheManager.java:2182)
     at org.jboss.web.tomcat.service.session.JBossCacheManager.storeSession(JBossCacheManager.java:313)
     at org.jboss.web.tomcat.service.session.InstantSnapshotManager.snapshot(InstantSnapshotManager.java:51)
    ...
     at java.lang.Thread.run(Thread.java:736)
    Caused by: 
    org.jboss.cache.lock.TimeoutException:Timed out waiting for flush to unblock.(timeout = 60 seconds)
     at org.jboss.cache.RPCManagerImpl$FlushTracker.waitForFlushCompletion(RPCManagerImpl.java:195)
     at org.jboss.cache.RPCManagerImpl.callRemoteMethods(RPCManagerImpl.java:741)
    ...
     at org.jboss.web.tomcat.service.session.distributedcache.impl.jbc.JBossCacheWrapper.put(JBossCacheWrapper.java:162)
     ...24 more
    
  • メモリーに問題がなく、 クラスターの他のノードが影響を受けている OOME の影響を受けていない場合でも、EAP インスタンスが、クライアントリクエストへの応答を停止するのはなぜですか?

Environment

  • JBoss Enterprise Application Platform (EAP)
    • 5.x

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