[rules-users] KnowledgeAgent custom class loader not working for PKG resources

[Hrumph]

Regretably, I’m still getting the same error with 5.4.0.Beta2.

I did rebuild my PKG in 5.4.0.Beta2 Guvnor and switched my Drools dependencies over to 5.4.0.Beta2 in my sample app pom too.

Is your 5.4.0 Snapshot later than this, and possibly it was fixed since Beta2?

Thanks,

Herm

From: Esteban [via Drools] [mailto:ml-node+s46999n3751457h76 at n3.nabble.com]
Sent: Thursday, February 16, 2012 12:05 PM
To: Herman Post
Subject: Re: [rules-users] KnowledgeAgent custom class loader not working for PKG resources

Could you please try using 5.4.0-SNAPSHOT? I tried to reproduce your error in that version, but I couldn't. Using 5.3.1 I experienced the error you mentioned.
Please note that in order to change drools version you need to have a binary .pkg compiled using the same version.

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com

2012/2/16 Herman Post <[hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=0>>
In debug,  KnowledgeAgentImpl.createPackageFromResource(), the last line to run is DroolsStreamUtils.streamIn(is), then an excecption is caught:

this.listener.exception( new RuntimeException( "KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage  ", ex));

The exception here says “java.lang.ClassNotFoundException: org.ihc.hwcir.drools.facts.Patient”, which is my Fact model.  It doesn’t seem to get surfaced anywhere.

As my sample illustrates, if I switch to DRL changeset, or put Patient.jar on classpath all works fine.

Thanks,

Herm

From: [hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=1> [mailto:[hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=2>] On Behalf Of Esteban Aliverti
Sent: Thursday, February 16, 2012 10:33 AM

To: Rules Users List
Subject: Re: [rules-users] KnowledgeAgent custom class loader not working for PKG resources

By the way, in the stacktrace you pasted I only see a NullPointerException, but no ClassNotFoundException. Where are you seeing the ClassNotFoundException?

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
2012/2/16 Herman Post <[hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=3>>
Thanks Esteban, I will enter in Jira.


Herm

From: [hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=4> [mailto:[hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=5>] On Behalf Of Esteban Aliverti
Sent: Thursday, February 16, 2012 10:07 AM
To: Rules Users List
Subject: Re: [rules-users] KnowledgeAgent custom class loader not working for PKG resources

Seems like a bug to me. The best you can do is to rise a Jira issue.
Actually, the best you can do is to provide a patch also ;)

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Thu, Feb 16, 2012 at 5:59 PM, Hrumph <[hidden email]</user/SendEmail.jtp?type=node&node=3751457&i=6>> wrote:
Sorry for being a nuisance, but unless we are doing something wrong, this is
a significant issue for us.  We are trying to deploy Drools on a remote
server and hope to pull PKG Changesets and Fact models from Guvnor.  It is
essential that we can use custom Classloaders in our design.

Should I just enter this in Jira?

Thanks,

Herm



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