FireAllRules can trigger java.util.concurrent.RejectedExecutionException from the JDKTimerService ------------------------------------------------------------------------------------------------- Key: DROOLS-1103 URL: https://issues.jboss.org/browse/DROOLS-1103 Project: Drools Issue Type: Bug Affects Versions: 6.3.0.Final Reporter: Juan Carlos Garcia Assignee: Mario Fusco Under very rare circumstance we have found the following exception *java.util.concurrent.RejectedExecutionException* in our production log. Our guess is that the Drools Session is on its way to be dispose, while a new incoming request is in the middle of a fireAllRules operation (race condition). I will try to provide a reproducible testcase for this. {code} Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@3e896443 rejected from java.util.concurrent.ScheduledThreadPoolExecutor@71cc2f4c[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0] at java.util.concurrent.ThreadPoolExecutor$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:118) at org.drools.core.time.impl.JDKTimerService.scheduleJob(JDKTimerService.java:101) at org.drools.core.phreak.PhreakTimerNode.scheduleTimer(PhreakTimerNode.java:304) at org.drools.core.phreak.PhreakTimerNode.scheduleLeftTuple(PhreakTimerNode.java:233) at org.drools.core.phreak.PhreakTimerNode.doLeftUpdates(PhreakTimerNode.java:131) at org.drools.core.phreak.PhreakTimerNode.doNode(PhreakTimerNode.java:65) at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:357) at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161) at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116) at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:194) at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:67) at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935) at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1200) at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:957) at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:936) at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:260) at XXXXXX.XXXXX.XXXXX.processEventDrools(EventProcessorImpl.java:128) at XXXXXX.XXXXX.XXXXX.processEvent(EventProcessorImpl.java:101) {code}