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

[Michael Anstis]

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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20110104/9374b249/attachment.html