[rules-users] KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage

Wed Jan 5 09:48:43 EST 2011

Hi John,

Hmmm.... one of these types of problem. Nice.

Firstly, the "re-compile\re-package" malarkey is the same as "Build package"
on the package information screen (or whatever we want to call that too!)

I am suspicious that something somewhere else has not caused the problem: If
Guvnor 5.1.1 (presumably) worked OK for a couple of weeks following the
upgrade.....

Was this the first new package created with 5.1.1? Has the server been
restored for some reason (to a backup with 5.0.1)? Have any new packages
been successful?

Thanks,

Mike

On 4 January 2011 18:12, John Peterson <john.peterson.gv3k at statefarm.com>wrote:

> I upgraded Guvnor on the JBoss server by replacing the 5.0.1
> drools-guvnor.war in /server/default/deploy with the drools-guvnor.war
> for 5.1.1.  Once we restarted the server, everything seemed to be
> working fine with the 5.1.1 features.  It wasn't until a couple weeks
> later when we tried to connect that we started getting the failure
> messages.  The package in question is new since the upgrade.
>
> How do I re-compile/re-package the binaries?  I'm assuming this is
> different from doing a "Save and validate configuration" or "Build
> package" on the package screen.
>
> Thanks and a Happy New Year to you as well!
>
> John
>
> Message: 2
> Date: Tue, 4 Jan 2011 16:56:52 +0000
> From: Michael Anstis <michael.anstis at gmail.com>
> Subject: Re: [rules-users] KnowledgeAgent exception while trying to
>        deserialize KnowledgeDefinitionsPackage
> To: Rules Users List <rules-users at lists.jboss.org>
> Message-ID:
>        <AANLkTiktBPpALU68Ptbha=gVQ7OYDeMs1Eee+u+TmbFj at mail.gmail.com<gVQ7OYDeMs1Eee%2Bu%2BTmbFj at mail.gmail.com>
> >
> Content-Type: text/plain; charset="windows-1252"
>
> Hi John,
>
> AFAIK you need both client (i.e. your IDE) and server versions of Guvnor
> to be the same.
>
> If you are trying to load a package from an existing (5.0.1) Guvnor
> repositoty I believe you will need to re-compile\re-package the binaries
> as a number of SerialVersionIds changed.
>
> It wasn't clear from your email whether this is what you have set-up.
>
> Happy New Year!
>
> Mike
>
> 2011/1/4 John Peterson <john.peterson.gv3k at statefarm.com>
>
> >  This is sort of a repost of an error I?ve been getting, but I thought
>
> > with the new year, I?d give it another shot.
> >
> > I?ve been getting the following exception in my code:
> >
> > [2010:12:361 09:12:910:debug] KnowledgeAgent rebuilding KnowledgeBase
> > using ChangeSet
> >
> > [2010:12:361 09:12:972:exception]
> >
> > ***java.lang.RuntimeException*: KnowledgeAgent exception while trying
> > to deserialize KnowledgeDefinitionsPackage
> >
> >
> > atorg.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(*
> > **
> > KnowledgeAgentImpl.java:664*)
> >
> >
> > atorg.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase
> > (*
> > **KnowledgeAgentImpl.java:889*)
> >
> >   at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(***
> > KnowledgeAgentImpl.java:704*)
> >
> >   at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(***
> > KnowledgeAgentImpl.java:584*)
> >
> >   at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(***
> > KnowledgeAgentImpl.java:185*)
> >
> >   at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(***
> > KnowledgeAgentImpl.java:168*)
> >
> >   at com.agencyawards2.RuleSessionProviderFactory.getSessionFactory(
> > ***RuleSessionProviderFactory.java:95*)
> >
> >   at com.agencyawards2.RuleSessionProviderFactory.getProvider(***
> > RuleSessionProviderFactory.java:35*)
> >
> >   at com.agencyawards2.RunRules.runRules(***RunRules.java:27*)
> >
> >   at com.agencyawards2.DroolsTest.main(***DroolsTest.java:40*)
> >
> > Caused by:*** java.io.StreamCorruptedException*: invalid stream
> > header:7061636B
> >
> >   at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
> >
> >   at java.io.ObjectInputStream.<init>(Unknown Source)
> >
> >   at org.drools.common.DroolsObjectInputStream.<init>(***
> > DroolsObjectInputStream.java:71*)
> >
> >   at org.drools.core.util.DroolsStreamUtils.streamIn(***
> > DroolsStreamUtils.java:205*)
> >
> >   at org.drools.core.util.DroolsStreamUtils.streamIn(***
> > DroolsStreamUtils.java:174*)
> >
> >
> > atorg.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(*
> > **
> > KnowledgeAgentImpl.java:653*)
> >
> >   ... 9 more
> >
> > I?m running Drools 5.1.1 on my workstation in Eclipse.  When I run it
> > against Guvnor locally using version 5.1.1 installed as the ?Guvnor
> > Standalone? downloaded at the same time as Drools 5.1.1 was
> downloadedfrom the JBoss.org site, it works fine.
> >
> > When I run it against the server, which was from the 5.0.1 ?Guvnor
> > Standalone? installation, but I updated the drools-guvnor.war file to
> > use the new 5.1.1 version, I get the error listed above.  Based on my
> > research into the ?KnowledgeAgent exception while trying to
> > deserialize KnowledgeDefinitionsPackage? error, it seems to stem from
> > an incompatibility between versions of Drools.
> >
> > Do I need to install the 5.1.1 Guvnor Standalone to my server to bring
>
> > the versions into synch, or am I experiencing some other sort of
> problem?
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
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