[rules-users] Re: Serialization issue

[Eric Miles]

FYI, I tried running a test using Java serialization and I receive the
same issue.  Upon opening both artifacts of Java and XStream
serialization, I find a reference to the missing class however it's just
not being loaded into the VM.

Again, if anyone can give me some pointers on where/how to track down
this issue I'd appreciate it.

Thanks,
Eric
On Thu, 2007-12-13 at 11:28 -0500, Eric Miles wrote:
> All,
> 
> I'm using Xstream for serialization in my project.  I am having an issue
> after deserializing a package in that application's classloader can't
> find a generated class created by Drools for a function.  When I look at
> the serialized XML, I see an entry for the class:
> 
> <entry>
> <string>com/kronos/webta/service/smarttime/rules/CalculateTotal.class</string>
> ...
> </entry>
> 
> When I step through the Package being deserialized, I see the proper
> function name if the functions list (calculateTotal) as well as I see
> com.kronos.webta.service.smarttime.rules.CalculateTotal.calculateTotal
> listed as a static import.
> 
> However, when I go to actually run this rule I get the following:
> 
> java.lang.NoClassDefFoundError:
> com/kronos/webta/service/smarttime/rules/CalculateTotal
> 	ASMAccessorImpl_52652861197561487220.getValue(Unknown Source)
> 	org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:173)
> 	org.mvel.MVELRuntime.execute(MVELRuntime.java:88)
> 	org.mvel.CompiledExpression.getValue(CompiledExpression.java:108)
> 	org.mvel.MVEL.executeExpression(MVEL.java:247)
> 	org.drools.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java:45)
> 	org.drools.reteoo.FromNode.assertTuple(FromNode.java:64)
> 	org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:20)
> 	org.drools.reteoo.CollectNode.modifyTuple(CollectNode.java:315)
> 	org.drools.reteoo.CollectNode.assertObject(CollectNode.java:214)
> 	org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)
> 	org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:140)
> 	org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:317)
> 	org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
> 	org.drools.reteoo.Rete.assertObject(Rete.java:177)
> 	org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
> 	org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
> 	org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1268)
> 	org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:96)
> 
> Anyone have any idea about how to go about finding out what the issue is?
> 
> Thanks in advance.
> 
> Eric