[jboss-jira] [JBoss JIRA] (DROOLS-987) Errors in Phreak under heavy and multi threaded load
Mario Fusco (JIRA)
issues at jboss.org
Tue Jan 26 12:39:00 EST 2016
[ https://issues.jboss.org/browse/DROOLS-987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13153985#comment-13153985 ]
Mario Fusco commented on DROOLS-987:
------------------------------------
I believe that this problem is caused by drools/jbpm interaction and in particular by the fact that jbpm is triggering a reentrant flushing of the propagation queue as demonstrated by the following stack trace. We need to figure out if we can avoid this reentrant flushing or even better if we can make it safer.
{code}
org.jbpm.workflow.instance.WorkflowRuntimeException: [droolsTest.RFGAB:47 - :4] -- null
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:179)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:366)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:325)
at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:44)
at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:341)
at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:318)
at org.jbpm.workflow.instance.node.RuleSetNodeInstance.signalEvent(RuleSetNodeInstance.java:124)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:490)
at org.jbpm.process.instance.event.DefaultSignalManager.internalSignalEvent(DefaultSignalManager.java:82)
at org.jbpm.process.instance.event.DefaultSignalManager$SignalAction.execute(DefaultSignalManager.java:181)
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:78)
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:68)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:2003)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:1548)
at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:74)
at org.jbpm.process.instance.ProcessRuntimeImpl$3.afterRuleFlowGroupDeactivated(ProcessRuntimeImpl.java:458)
at org.drools.core.event.AgendaEventSupport.fireAfterRuleFlowGroupDeactivated(AgendaEventSupport.java:180)
at org.drools.core.common.DefaultAgenda.getNextFocus(DefaultAgenda.java:552)
at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1341)
at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1284)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1303)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1293)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1274)
at org.drools.test.RulesJUnitTest$1.afterRuleFlowGroupActivated(RulesJUnitTest.java:87)
at org.drools.core.event.AgendaEventSupport.fireAfterRuleFlowGroupActivated(AgendaEventSupport.java:152)
at org.drools.core.common.DefaultAgenda.activateRuleFlowGroup(DefaultAgenda.java:707)
at org.drools.core.common.DefaultAgenda.activateRuleFlowGroup(DefaultAgenda.java:695)
at org.jbpm.workflow.instance.node.RuleSetNodeInstance.internalTrigger(RuleSetNodeInstance.java:88)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:173)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:366)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:325)
at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:73)
at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:44)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:173)
at org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:35)
at org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:236)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:439)
at org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:208)
at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:191)
at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:183)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:1797)
at org.drools.test.RulesJUnitTest$ThreadAB.run(RulesJUnitTest.java:174)
Caused by: java.lang.NullPointerException
at org.drools.core.common.TupleSetsImpl.setNextTuple(TupleSetsImpl.java:343)
at org.drools.core.common.TupleSetsImpl.removeInsert(TupleSetsImpl.java:158)
at org.drools.core.common.TupleSetsImpl.addDelete(TupleSetsImpl.java:97)
at org.drools.core.reteoo.LeftInputAdapterNode.doDeleteSegmentMemory(LeftInputAdapterNode.java:285)
at org.drools.core.reteoo.LeftInputAdapterNode.doDeleteObject(LeftInputAdapterNode.java:256)
at org.drools.core.reteoo.LeftInputAdapterNode.retractLeftTuple(LeftInputAdapterNode.java:351)
at org.drools.core.reteoo.ObjectTypeNode.doRetractObject(ObjectTypeNode.java:333)
at org.drools.core.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:317)
at org.drools.core.reteoo.EntryPointNode.propagateRetract(EntryPointNode.java:357)
at org.drools.core.phreak.PropagationEntry$Delete.execute(PropagationEntry.java:173)
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:78)
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:68)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:2003)
at org.drools.core.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:1548)
at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:74)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.setState(WorkflowProcessInstanceImpl.java:377)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.setState(WorkflowProcessInstanceImpl.java:384)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.nodeInstanceCompleted(WorkflowProcessInstanceImpl.java:592)
at org.jbpm.workflow.instance.node.EndNodeInstance.internalTrigger(EndNodeInstance.java:72)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:173)
... 41 more
{code}
> Errors in Phreak under heavy and multi threaded load
> -----------------------------------------------------
>
> Key: DROOLS-987
> URL: https://issues.jboss.org/browse/DROOLS-987
> Project: Drools
> Issue Type: Bug
> Components: core engine
> Affects Versions: 6.3.0.Final
> Environment: linux
> Java 7
> kernel 3.16
> Reporter: Jose Cavieres
> Assignee: Mario Fusco
> Attachments: jbpm-bussinesruletask-concurrent-6-3-NEW.tgz, jbpm-bussinesruletask-concurrent-6-3.tgz
>
>
> Several threads are started, each one starts 1 jbpm process containing rule(s) task(s).
> If the threads are few, everything works fine. Under heavy load nullPointerExceptions are thown most of the time, less frequently fireAllRules never ends and CPU remains at 100%.
> Aparently the setFocus method used by rule tasks is related to the problem.
> The most comon error is:
> Caused by: java.lang.NullPointerException
> at org.drools.core.common.LeftTupleSetsImpl.removeInsert(LeftTupleSetsImpl.java:141)
> at org.drools.core.common.LeftTupleSetsImpl.addDelete(LeftTupleSetsImpl.java:80)
> at org.drools.core.reteoo.LeftInputAdapterNode.doDeleteSegmentMemory(LeftInputAdapterNode.java:295)
> at org.drools.core.reteoo.LeftInputAdapterNode.doDeleteObject(LeftInputAdapterNode.java:266)
> at org.drools.core.reteoo.LeftInputAdapterNode.retractLeftTuple(LeftInputAdapterNode.java:361)
> at org.drools.core.reteoo.ObjectTypeNode.doRetractObject(ObjectTypeNode.java:334)
> at org.drools.core.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:317)
> at org.drools.core.reteoo.EntryPointNode.propagateRetract(EntryPointNode.java:358)
> at org.drools.core.phreak.PropagationEntry$Delete.execute(PropagationEntry.java:172)
> 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)
--
This message was sent by Atlassian JIRA
(v6.4.11#64026)
More information about the jboss-jira
mailing list