Details
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Type:
Bug
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Status: Resolved (View Workflow)
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 24.1.2, Meridian-2018.1.10
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Fix Version/s: 24.1.3, Meridian-2018.1.11
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Component/s: None
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Security Level: Default (Default Security Scheme)
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Sprint:Horizon 2019 - July 31st, Horizon 2019 - August 7th
Description
Customer reported a case where a Drools engine used in the correlator would hang on shutdown.
Stack for the thread invoking the shutdown looks like:
"RMI TCP Connection(42)-127.0.0.1" #10606 daemon prio=9 os_prio=0 tid=0x00007fdbc472a790 nid=0x6f1d in Object.wait() [0x00007fdba65e1000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.waitInactive(DefaultAgenda.java:1380) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.waitAndEnterExecutionState(DefaultAgenda.java:1373) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.dispose(DefaultAgenda.java:1473) - locked <0x000000052a235040> (a java.lang.Object) at org.drools.core.common.DefaultAgenda.dispose(DefaultAgenda.java:1224) at org.drools.core.impl.StatefulKnowledgeSessionImpl.dispose(StatefulKnowledgeSessionImpl.java:497) at org.opennms.netmgt.correlation.drools.DroolsCorrelationEngine.marshallStateToDisk(DroolsCorrelationEngine.java:328) - locked <0x0000000531fc09d8> (a org.opennms.netmgt.correlation.drools.DroolsCorrelationEngine) at org.opennms.netmgt.correlation.drools.DroolsCorrelationEngine.tearDown(DroolsCorrelationEngine.java:294) at org.opennms.netmgt.correlation.Correlator.onStop(Correlator.java:167)
Thread for the engine calling fireUntilHalt looks like:
"FireTask" #269 prio=5 os_prio=0 tid=0x00007fdbc3860b30 nid=0x3c39 in Object.wait() [0x00007fdbb83ce000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.waitInactive(DefaultAgenda.java:1380) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.waitAndEnterExecutionState(DefaultAgenda.java:1373) at org.drools.core.common.DefaultAgenda$ExecutionStateMachine.toFireUntilHalt(DefaultAgenda.java:1341) - locked <0x000000052a235040> (a java.lang.Object) at org.drools.core.common.DefaultAgenda$RestHandler$FireUntilHaltRestHandler.handleRest(DefaultAgenda.java:1144) at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1079) at org.drools.core.common.DefaultAgenda.internalFireUntilHalt(DefaultAgenda.java:996) at org.drools.core.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:988) at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:1347) at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:1326) at org.opennms.netmgt.correlation.drools.DroolsCorrelationEngine.lambda$initialize$3(DroolsCorrelationEngine.java:246) at org.opennms.netmgt.correlation.drools.DroolsCorrelationEngine$$Lambda$146/1854387890.run(Unknown Source) at java.lang.Thread.run(Thread.java:748)