[rules-dev] NPE in AbstractWorkingMemory.update

[Mark Proctor]

For Drools 5.0 I moved away from async methods on the main interfaces, 
as it just got messy repeating ever method with an async version. 
Instead I plan to add a single async equivalent of the 
CommandExecutor.execute() method, and all async operations can be done 
that way. Much cleaner.

Mark
Edson Tirelli wrote:
>
>    Hey Greg, please do open the JIRA.
>
>    Thanks
>        Edson
>
> 2009/5/27 Greg Barton <greg_barton at yahoo.com 
> <mailto:greg_barton at yahoo.com>>
>
>
>     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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>
>
>
>
> -- 
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss, a division of Red Hat @ www.jboss.com <http://www.jboss.com>
> ------------------------------------------------------------------------
>
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