I’m getting the following error when I attempt to run my Drools application.  I recently upgraded from Drools 5.0.1 and Guvnor 5.0.1 to 5.1.1 (for both).  I’ve looked through the rules-users list and I found the issue with the XML Change Set (authentication), which I’ve addressed (XML listed at the bottom), but I’m still getting the error.  Does anyone have any ideas or can point me in a particular direction?

Thanks

Error:

[2010:12:337 09:12:373:debug] KnowledgeAgent mapping resource=[ClassPathResource path='ruleflow.rf'] to KnowledgeDefinition=org.drools.ruleflow.core.RuleFlowProcess@2d89ba2a

[2010:12:337 09:12:373:exception]

java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage 

        at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:914)

        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:102)

        at com.agencyawards2.RuleSessionProviderFactory.getProvider(RuleSessionProviderFactory.java:30)

        at com.agencyawards2.RunRules.runRules(RunRules.java:25)

        at com.agencyawards2.DroolsTest.main(DroolsTest.java:36)

Caused by: java.lang.NullPointerException

        at org.drools.process.core.impl.ProcessImpl.equals(ProcessImpl.java:134)

        at java.util.HashMap.put(Unknown Source)

        at java.util.HashSet.add(Unknown Source)

        at org.drools.agent.impl.KnowledgeAgentImpl$RegisteredResourceMap.putDefinition(KnowledgeAgentImpl.java:1150)

        at org.drools.agent.impl.KnowledgeAgentImpl.addDefinitionMapping(KnowledgeAgentImpl.java:1037)

        at org.drools.agent.impl.KnowledgeAgentImpl.buildResourceMapping(KnowledgeAgentImpl.java:496)

        at org.drools.agent.impl.KnowledgeAgentImpl.buildResourceMapping(KnowledgeAgentImpl.java:443)

        at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:912)

        ... 8 more

Change Set:

  <?xml version="1.0" encoding="UTF-8" ?>

- <change-set xmlns="http://drools.org/drools-5.0/change-set" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:schemaLocation="http://drools.org/drools-5.0/change-set drools-change-set-5.0.xsd">

- <add>

  <resource source="http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/com.agencyawards2/LATEST" type="PKG" basicAuthentication="enabled" username="admin" password="admin" />

  </add>

  </change-set>