On 7/3/07, s erel <erelsagi@gmail.com> wrote:

In our project we are creating a StatefulRuleSession and saving it in a per-thread context (i.e. Each thread has it's own StatefulRuleSession):

ruleServiceProvider.getRuleRuntime().createRuleSession(contextName, properties, RuleRuntime.STATEFUL_SESSION_TYPE);

When a thread session ends, we are calling release on the previously created StatefulRuleSession.

Changing the following lines:

public abstract class AbstractHashTable


...

    public Iterator iterator() {
//        if ( this.iterator == null ) {
//            this.iterator = new HashTableIterator( this );
//        }
//
//        this.iterator.reset();
//        return this.iterator;

        HashTableIterator iterator = new HashTableIterator(this);
        iterator.reset();

        return iterator;
    }
Seems to solve the problem I've encountered. What's your opinion?
On 7/2/07, Mark Proctor <mproctor@codehaus.org > wrote:

a working memory should be single threaded, so not sure how this could be a race condition?

Mark

s erel wrote:

I've done a little debugging. The code fails in the following segment:

public static class HashTableIterator

...

while ( this.entry == null ) {
                    this.row++;
                    if ( this.row == this.length ) {
                        return null;
                    }
                    this.entry = this.table[this.row]; // ---> index out of bounds exception
                }

}

this.row has the same value as this.length despite the condition above it. Probably a race condition issue.

On 7/2/07, Mark Proctor <mproctor@codehaus.org > wrote:

Not really :(

In your situation I tend to keep removing rules and data while still making sure the error happens, to get it down to a minimum. Please do try, as this isn't an error that should happen. Or alterntaively you can open drools-core and drools-compiler in eclipse and execuse and debug this yourself - in your situation this might best. you can put in a breakpoint to listen for that particular exception.

Mark

s erel wrote:

It's hard for me to provide a self contained project. The drl is long and uses several business objects. It's the same drl as we've been using for 306 minus the keyword changes.

Is there anything else i can check or provide you in order to solve this matter.

Thanks

On 7/1/07, Mark Proctor <mproctor@codehaus.org > wrote:

Can you provide us a self contained project which creates this error? Unless we can recreate it, it will be very hard to track it down. Please attach the project to a jira and we'll make it a priority.

Mark
s erel wrote:

Hello,

I've just started integrating MR3 into my project (I've previously used 3.06). The drl compiles and everything seems fine, but during

tests the following exception is thrown for time to time:

java.lang.ArrayIndexOutOfBoundsException: 17
at org.drools.util.AbstractHashTable$HashTableIterator.next(AbstractHashTable.java:250)
at org.drools.reteoo.Rete$ObjectTypeConf.buildCache(Rete.java:434)
at org.drools.reteoo.Rete$ObjectTypeConf.getObjectTypeNodes(Rete.java:425)
at org.drools.reteoo.Rete.assertObject(Rete.java:172)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute (ReteooWorkingMemory.java:163)
at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1135)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:781)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:584)
at org.drools.jsr94.rules.StatefulRuleSessionImpl.addObject(StatefulRuleSessionImpl.java:162)

This only happens during high load tests.

Can anyone help me?

Thanks

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