[rules-users] removeKnowledgePackage Call Hangs!!

[Greg Barton]

If it's package dependent it might be hard for the devs to reproduce.

To facilitate debugging, and to gather information for a JIRA post, try detecting the deadlock.  When the call hangs try connecting to the JVM using JConsole. (It's included in the JDK for java5 and later.) From JConsole, go to the "Threads" tab and click the "Detect Deadlock" button.

If you're on a linux (and I think also Solaris) system you can perform a "kill -3" on the JVM process to get the same information.  It will dump the thread state to stdout.

--- On Thu, 5/13/10, malkhafaji <moe.alkhafaji at medcpu.com> wrote:

> From: malkhafaji <moe.alkhafaji at medcpu.com>
> Subject: Re: [rules-users] removeKnowledgePackage Call Hangs!!
> To: rules-users at lists.jboss.org
> Date: Thursday, May 13, 2010, 3:15 PM
> 
> I found out one more thing, this call above consistently
> happens with that
> rule and the package it is unloading. I checked another
> rule that unloads
> another package and it works consistently fine.
> 
> What could be the problem? I am assuming that if there are
> threads launched
> by Drools to execute rules that that would be taken into
> account by Drools'
> removeKnowledgePackage correct? So, there shouldn't be a
> deadlock. So,
> something is causing that call to hang on that package, but
> not on another
> package. Anybody has any idea where I can look for a
> possible solution or
> even where to start looking?
> 
> Thanks.
> -- 
> View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/removeKnowledgePackage-Call-Hangs-tp815616p815767.html
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> Nabble.com.
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