[jboss-jira] [JBoss JIRA] Updated: (JBRULES-740) IncompatibleClassChangeError working with ShadowProxy

[Dirk Bergstrom (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-740?page=all ]

Dirk Bergstrom updated JBRULES-740:
-----------------------------------

    Attachment: more-stacktraces.txt

The file more-stacktraces.txt has traces taken while my app was hung trying to assert an object. 

The object being asserted is a PRRecord, #938 of 10,500.  I don't know
why it hung on the 938th object; if I run it multiple times, it hangs
on different objects, and sometimes in different threads (while
asserting a different class of object).  These stacktraces were taken
over a 40 minute period, during which the jvm was fully utilizing a
CPU, and no progress was made (ie. it never finished asserting the
object).

The rule that shows up in the traces is:

rule "Find all PRs for user"
when
  $user : User( )
  $pr_list : RecordSet( size > 0 ) from
   collect( PRRecord( $resp : responsible -> ( $user.hasReport($resp) ) ) )
then
 $user.setRecords($pr_list, DataSource.GNATS);
end

This is using trunk, revision 10879, with Tirelli's hashcode caching
fix.  The good news is that it's not spending all its time calculating
the hashcode; the bad news is that it's still hung.


> IncompatibleClassChangeError working with ShadowProxy
> -----------------------------------------------------
>
>                 Key: JBRULES-740
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-740
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 3.1-m2
>         Environment: Trunk (revision 10170)
>            Reporter: Dirk Bergstrom
>         Assigned To: Edson Tirelli
>             Fix For: 3.1-m2
>
>         Attachments: more-stacktraces.txt, Record.java, RLIRecord.java, stacktraces.txt
>
>
> I'm getting an exception while asserting objects into the working memory.  Depending on the timing, I get different stacktraces leading up the same exception on the same generated class.  I have 15 rules and three types of objects in the working memory.  2500 User objects, 37 Milestone objects, and 2000 RLI objects.  If I assert all the Users and Milestones first, I get the first exception below during assertion of the RLI objects, at the 257th object asserted.  If I arrange to skip that particular record, I can assert a few more before another record trips the bug.  If I put a try/catch block around the assertion and continue after hitting an exception, I can assert about 1600 of the records successfully, and the others reliably throw (ie. if I try to assert them later).  If I assert RLIs first, I get the second stacktrace during assertion of Milestones.  Looks like the problem happens during execution of one or more rules.  I'll attach the RLI class, and its parent class (which is also the parent of the other two classes).
> Exception in thread "RLIs Processor" java.lang.IncompatibleClassChangeError
> 	at net.juniper.dash.data.RLIRecordShadowProxy.hashCode(Unknown Source)
> 	at java.util.HashMap.put(HashMap.java:418)
> 	at java.util.HashSet.add(HashSet.java:194)
> 	at org.drools.reteoo.CollectNode.assertTuple(CollectNode.java:135)
> 	at org.drools.reteoo.CollectNode.assertObject(CollectNode.java:212)
> 	at
> org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
> 	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
> 	at
> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:304)
> 	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:176)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:121)
> 	at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196)
> 	at
> org.drools.reteoo.ReteooWorkingMemory.doAssertObject(ReteooWorkingMemory.java:68)
> 	at
> org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:729)
> 	at
> org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:548)
> Exception in thread "Milestones and NPI Processor" java.lang.IncompatibleClassChangeError
> 	at net.juniper.dash.data.RLIRecordShadowProxy.hashCode(Unknown Source)
> 	at java.util.HashMap.put(HashMap.java:418)
> 	at java.util.HashSet.add(HashSet.java:194)
> 	at org.drools.reteoo.CollectNode.assertTuple(CollectNode.java:135)
> 	at org.drools.reteoo.CompositeTupleSinkAdapter.propagateAssertTuple(CompositeTupleSinkAdapter.java:30)
> 	at org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:116)
> 	at org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
> 	at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:147)
> 	at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
> 	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
> 	at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
> 	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:176)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:121)
> 	at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196)
> 	at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(ReteooWorkingMemory.java:68)
> 	at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:729)
> 	at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:548)
> 	at net.juniper.dash.data.DataSource.reconcileAssertedRecords(DataSource.java:190)
> 	at net.juniper.dash.data.DataSource.populateRecords(DataSource.java:150)
> 	at net.juniper.dash.Updater$DataSourceProcessor.work(Updater.java:181)
> 	at net.juniper.dash.Refresher.run(Refresher.java:70)

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