[ https://issues.jboss.org/browse/DROOLS-1103?page=com.atlassian.jira.plugi... ] Juan Carlos Garcia commented on DROOLS-1103: -------------------------------------------- No i don't, just to mention my setup: We create thousands of StatefulKnowledgeSession session per hour as each of them correspond to a gaming session between few users (besides regulars game rules, we also have timer rules to control certain aspect as timeout, disconnect, ect), so once a game if finished we received a message to close the game (if we don't get the appropriate message we have some Janitors kicking in every 5 / 10 minutes and disposing the Sessions that are still in our SessionStore (ConcurrentMap on a Singleton EJB) and haven't received events from customers) and we disposed our StatefulKnowledgeSession in order to be good citizens. In order to mitigate that exception we are now Serializing user access, per game to the StatefulKnowledgeSession thru our own locking. I check today and we had only one of this exception in the past 15 days (but looks little bit different). as it is coming from a timer being triggered directly and not from FireAllRules scenario. {code} _ThreadID=21899;_ThreadName=pool-116731-thread-1;_TimeMillis=1467642563388;_LevelValue=900;| Unable to execute timer job! java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@60560a44 rejected from java.util.concurrent.ScheduledThreadPoolExecutor@7671ec29[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 6] at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2047) at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:823) at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:326) at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:549) at org.drools.core.time.impl.JDKTimerService.internalSchedule(JDKTimerService.java:116) at org.drools.core.time.impl.JDKTimerService.scheduleJob(JDKTimerService.java:99) at org.drools.core.phreak.PhreakTimerNode.scheduleTimer(PhreakTimerNode.java:307) at org.drools.core.phreak.PhreakTimerNode.scheduleLeftTuple(PhreakTimerNode.java:230) at org.drools.core.phreak.PhreakTimerNode.doLeftInserts(PhreakTimerNode.java:108) at org.drools.core.phreak.PhreakTimerNode.doNode(PhreakTimerNode.java:83) at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:400) at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:332) at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:166) at org.drools.core.phreak.AddRemoveRule.forceFlushLeftTuple(AddRemoveRule.java:320) at org.drools.core.phreak.AddRemoveRule.flushLeftTupleIfNecessary(AddRemoveRule.java:293) at org.drools.core.reteoo.BetaNode.assertObject(BetaNode.java:294) at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) at org.drools.core.reteoo.ObjectTypeNode.propagateAssert(ObjectTypeNode.java:298) at org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:93) at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:96) at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:69) at org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:1993) at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:128) at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:78) at org.drools.core.phreak.PhreakTimerNode$TimerAction.evaluateAndFireRule(PhreakTimerNode.java:439) at org.drools.core.phreak.PhreakTimerNode$TimerAction.execute(PhreakTimerNode.java:431) at org.drools.core.phreak.SynchronizedPropagationList$1.execute(SynchronizedPropagationList.java:39) at org.drools.core.common.DefaultAgenda.executeTask(DefaultAgenda.java:1355) at org.drools.core.phreak.SynchronizedPropagationList.addEntry(SynchronizedPropagationList.java:36) at org.drools.core.impl.StatefulKnowledgeSessionImpl.addPropagation(StatefulKnowledgeSessionImpl.java:1989) at org.drools.core.phreak.PhreakTimerNode$TimerNodeJob.execute(PhreakTimerNode.java:375) at org.drools.core.time.SelfRemovalJob.execute(SelfRemovalJob.java:34) at org.drools.core.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:69) at org.drools.core.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:30) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) {code} -- This message was sent by Atlassian JIRA (v6.4.11#64026)