[rules-dev] NPE in AbstractWorkingMemory.update

[Greg Barton]

null.  null.  InternalFactHandle.getEqualityKey() is sometimes returning null. :)

--- On Wed, 5/27/09, Greg Barton <greg_barton at yahoo.com> wrote:

> From: Greg Barton <greg_barton at yahoo.com>
> Subject: [rules-dev] NPE in AbstractWorkingMemory.update
> To: "Rules Dev List" <rules-dev at lists.jboss.org>
> Date: Wednesday, May 27, 2009, 1:25 AM
> 
> At seemingly random times I'm getting this exception:
> 
> Exception in thread "Thread-5"
> java.lang.NullPointerException
>         at
> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1387)
>         at
> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1350)
>         at
> org.drools.concurrent.UpdateObject.execute(UpdateObject.java:46)
>         at
> org.drools.concurrent.CommandExecutor.run(CommandExecutor.java:78)
>         at
> java.lang.Thread.run(Thread.java:619)
> 
> I've only gotten the exception when using
> StatefulSession.asyncUpdate() from a separate thread. 
> 
> 
> AbstractWorkingMemory.java:1387 is wrapped in an if
> statement that checks whether maintainTms==true, so setting
> that to false has apparently avoided the problem. (Can't be
> 100% sure, but it has been runnign for a few hours without
> exception.) The FactHandles I'm passing in to
> StatefulSession.asyncUpdate() are never null, so I can only
> guess that InternalFactHandle.getEqualityKey() is sometimes
> returning false.
> 
> Do you want a JIRA on this?  I can't recreate it
> reliably.
> 
> 
> 
>       
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