6:04 a.m.
[
https://issues.jboss.org/browse/DROOLS-1059?page=com.atlassian.jira.plugi...
]
Sebastian Schaer commented on DROOLS-1059:
------------------------------------------
Hi,
I'm experiencing the same issue as well under a stress test situation:
Seemingly random failures for queries (but they all exist).
We typically run only about 10-20 rules though.
I will try to add more information or work on a reproducer (if I find the time).
Just my observations and an example stacktrace of the error we encounter:
{code}
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | [m java.lang.RuntimeException:
Unable to find query 'rule_2f6dc65eb814487eb37acde7c99c2a16_query'
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.phreak.SegmentUtilities.getQueryLiaNode(SegmentUtilities.java:518)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.phreak.SegmentUtilities.getQuerySegmentMemory(SegmentUtilities.java:208)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.reteoo.SegmentMemory$QueryMemoryPrototype.populateMemory(SegmentMemory.java:505)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.reteoo.SegmentMemory$Prototype.newSegmentMemory(SegmentMemory.java:400)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.impl.KnowledgeBaseImpl.createSegmentFromPrototype(KnowledgeBaseImpl.java:1424)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.phreak.SegmentUtilities.restoreSegmentFromPrototype(SegmentUtilities.java:186)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.387 | at
org.drools.core.phreak.SegmentUtilities.createSegmentMemory(SegmentUtilities.java:83)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.phreak.SegmentUtilities.createChildSegment(SegmentUtilities.java:321)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.phreak.SegmentUtilities.createChildSegments(SegmentUtilities.java:313)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.reteoo.LeftInputAdapterNode.doInsertObject(LeftInputAdapterNode.java:186)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:170)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:60)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:366)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.reteoo.ObjectTypeNode.propagateAssert(ObjectTypeNode.java:298)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:93)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:96)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:69)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:1993)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1289)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1294)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1281)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.413 | at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1270)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.414 | at
org.drools.core.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:107)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.414 | at
org.drools.core.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:34)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.414 | at
org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:153)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.414 | at
org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:69)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
INFO | jvm 1 | main | 2016/03/25 18:34:14.414 | at
org.drools.core.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:292)
~[drools-core-6.3.0.Final.jar:6.3.0.Final]
{code}
Unlike [~massinissa] we use stateless sessions and the exception happens when we execute
the FireAllRulesCommand.
I also implemented a very simple retry logic (limited to 5 retries) around this specific
exception (catching this exception, and reusing the existing stateless session to execute
the same command again) and so far I have not encountered any case where the exception
gets thrown a second time. And from all I can tell the second time the FireAllRulesCommand
is executed, the rule evaluation seems ok (we create/insert facts and all of that seems to
be working fine).
(So my preliminary workaround is to just re-execute the same command on the same session
and it seems ok so far. This of course might not work with stateful sessions).
Drools can't find rules under stress
------------------------------------
Key: DROOLS-1059
URL: https://issues.jboss.org/browse/DROOLS-1059
Project: Drools
Issue Type: Bug
Components: core engine
Affects Versions: 6.3.0.Final
Reporter: Massinissa BOUZIAD
Assignee: Mario Fusco
Priority: Blocker
Attachments: DroolsBugReproducerTest.java, reproducerRule.drl
In my knowledge base, I have many rules.
All of them are working very well in production with drools 6.0.1-FINAL even in stress
condition hight trafic (arount 40 hits seconds)
This bug append when we made an upgrade with drools 6.3.0-FINAL which is compatible with
jdk8 mandatory in my case.
So now when I put my rules under stress test (benchmarking) I got this random error.
Drools is unable to find a query (not always the same one).
I got this error for 0,6% of my requests.
*+Following the stack trace : +*
Unable to find query 'checkAndBindBasket'
at org.drools.core.phreak.SegmentUtilities.getQueryLiaNode(SegmentUtilities.java:518)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.phreak.SegmentUtilities.getQuerySegmentMemory(SegmentUtilities.java:208)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.SegmentMemory$QueryMemoryPrototype.populateMemory(SegmentMemory.java:505)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.SegmentMemory$Prototype.newSegmentMemory(SegmentMemory.java:400)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.impl.KnowledgeBaseImpl.createSegmentFromPrototype(KnowledgeBaseImpl.java:1424)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.phreak.SegmentUtilities.restoreSegmentFromPrototype(SegmentUtilities.java:186)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SegmentUtilities.createSegmentMemory(SegmentUtilities.java:83)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:167)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:60)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:60)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.ObjectTypeNode.propagateAssert(ObjectTypeNode.java:298)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:93)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:96)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:69)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:1993)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1289)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1294)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1281)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1260)
~[darty-pricing-ws-2.0.2.jar:2.0.2]
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Sebastian Schaer (JIRA)