[rules-users] ClassCastException after migrating from Drools 4.x to v5.5

[Wolfgang Laun]

I may be mistaken, but the stack trace looks as if a stateless
knowledge session is being run, wherein it executes a RHS
("employeePreloadSystemConstants") where some fact is being inserted.

Not sure what *ought* to happen in this case, though: I've been trying
to find this out ever since 5.1.x. A meagre "...do not support
iterative insertions..." is all there is to be read, but what does
this imply? Simply doesn't work in an unspecified way? May crash on
workdays...?? A "tut, tut" from the Drools Team ??? ;-)

-W


On 18/02/2013, Mark Proctor <mproctor at codehaus.org> wrote:
> Looks like an 'or' bug. Which is surprising, as we had 'or' bugs in 4.x, and
> fixed a lot of them for 5.x.
>
> Could you build and try 5.5.x here now, this is the branch for the 5.6
> release:
> https://github.com/droolsjbpm/drools/tree/5.5.x
>
> If it's still not fixed, could you write an isolated test? Seems like you
> only need one rule, and two or three facts to trigger it. Ideally please
> re-use facts from the test classes already existing - details of how to
> write tests, and submit as pull requests is here:
> http://docs.jboss.org/drools/release/5.4.0.Final/droolsjbpm-introduction-docs/html/gettingstarted.html
>
> If you can get us this test pull request asap (next few days), we'll fix and
> get it into the 5.6 release. Otherwise you may have to wait some time for a
> fix.
>
> Mark
> On 18 Feb 2013, at 01:10, ismaximum <mnrz57 at gmail.com> wrote:
>
>> Ah sorry.. It seems my first message hasn't been accepted by the
>> user-list...
>> I post it again here:
>>
>> After we upgrade to Drools v 5.5 there are hundreds of errors in test
>> cases
>> related to our rules.
>> One of which is related to this ClassCastException which I noticed it
>> occurs
>> when we have nested OR statements
>>
>> Here is one example:
>>
>> rule "employeeContributionStartDateAfterAccountStartDate"
>>    ruleflow-group "EmployeeValidation"
>>    when
>>                // We only want this rule to fire when we are using the
>> create:Employee node.  NOTE that the startDate or contributionStartDate
>> cannot be updated
>>                EmployeeDetailsRulesModel(create == true)
>>                // Get the date to validate
>>        Employee( $contributionStartDate : contributionStartDate != null )
>>        (or
>>            (and
>>                // i.e. The contribution start date and the account start
>> dates are both specified.
>>                Account( $accountStartDate : accountStartDate != null )
>>                eval( $contributionStartDate.compare($accountStartDate) <
>> 0
>> )
>>            )
>>            (and
>>                // The contribution start date is specified but the
>> account
>> start date is not, but should be defaulted to today.
>>                Account( accountId == null, accountStartDate == null )
>>                SystemConstants($today : currentSystemDateWithoutTime)
>>                eval(
>> $contributionStartDate.compare(jaxbUtils.toXMLGregorianCalendarDateOnly($today))
>> < 0 )
>>            )
>>            (and
>>                // for an existing account where the account start date is
>> not specified.
>>                Account( $accountId : accountId != null, $accountStartDate
>> :
>> accountStartDate == null )
>>                $composerMemberAccount : BaseMemberAccount() from
>> memberAccountDAO.getMemberAccount($accountId)
>>                eval(
>> $contributionStartDate.compare(jaxbUtils.toXMLGregorianCalendarDateOnly($composerMemberAccount.getFundStartDate()))
>> < 0 )
>>            )
>>        )
>>    then
>>        error(ApplicationArea.EMPLOYEE, kcontext);
>> end
>>
>>
>>
>> Here is the error message:
>>
>> Exception executing consequence for rule "employeePreloadSystemConstants"
>> in
>> com.cname.rules.validation.business: org.drools.RuntimeDroolsException:
>> com.cname.rules.validation.business.Rule_employeeContributionStartDateAfterAccountStartDate_357b04c70dac4f469ea9cedd93d15da7Eval1Invoker at d3924bbc
>> : java.lang.ClassCastException:
>> com.cname.rules.model.common.EmployeeDetailsRulesModel cannot be cast to
>> com.cname.cbis.domain.update.Account
>>        at
>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
>>        at
>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)
>>        at
>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
>>        at
>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
>>        at
>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
>>        at
>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
>>        at
>> org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:230)
>>        at
>> org.drools.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:106)
>>        at
>> org.drools.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:32)
>>        at
>> org.drools.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:155)
>>        at
>> org.drools.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:76)
>>        at
>> org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:264)
>>        at
>> com.cname.rules.CBISAbstractRuleCoverageTest.runValidation(CBISAbstractRuleCoverageTest.java:441)
>>        at
>> com.cname.rules.business.EmployeeBusinessRulesTest.testEmployeeContributionStartDateAfterAccountStartDate(EmployeeBusinessRulesTest.java:348)
>>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>        at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>        at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>        at java.lang.reflect.Method.invoke(Method.java:597)
>>        at junit.framework.TestCase.runTest(TestCase.java:168)
>>        at junit.framework.TestCase.runBare(TestCase.java:134)
>>        at junit.framework.TestResult$1.protect(TestResult.java:110)
>>        at junit.framework.TestResult.runProtected(TestResult.java:128)
>>        at junit.framework.TestResult.run(TestResult.java:113)
>>        at junit.framework.TestCase.run(TestCase.java:124)
>>        at junit.framework.TestSuite.runTest(TestSuite.java:243)
>>        at junit.framework.TestSuite.run(TestSuite.java:238)
>>        at
>> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
>>        at
>> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
>>        at
>> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
>>        at
>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
>>        at
>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
>>        at
>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
>>        at
>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
>> Caused by: org.drools.RuntimeDroolsException:
>> com.cname.rules.validation.business.Rule_employeeContributionStartDateAfterAccountStartDate_357b04c70dac4f469ea9cedd93d15da7Eval1Invoker at d3924bbc
>> : java.lang.ClassCastException:
>> com.cname.rules.model.common.EmployeeDetailsRulesModel cannot be cast to
>> com.cname.cbis.domain.update.Account
>>        at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:119)
>>        at
>> org.drools.reteoo.EvalConditionNode.assertLeftTuple(EvalConditionNode.java:176)
>>        at
>> org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:196)
>>        at
>> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:71)
>>        at
>> org.drools.reteoo.JoinNode.propagateFromRight(JoinNode.java:159)
>>        at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:148)
>>        at
>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
>>        at
>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
>>        at
>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
>>        at
>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
>>        at
>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
>>        at
>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:311)
>>        at
>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
>>        at
>> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:192)
>>        at
>> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:186)
>>        at
>> com.cname.rules.validation.business.Rule_employeePreloadSystemConstants_dcf7facf199041d3aa8f3b85387b4318.defaultConsequence(Rule_employeePreloadSystemConstants_dcf7facf199041d3aa8f3b85387b4318.java:7)
>>        at
>> com.cname.rules.validation.business.Rule_employeePreloadSystemConstants_dcf7facf199041d3aa8f3b85387b4318DefaultConsequenceInvokerGenerated.evaluate(Unknown
>> Source)
>>        at
>> com.cname.rules.validation.business.Rule_employeePreloadSystemConstants_dcf7facf199041d3aa8f3b85387b4318DefaultConsequenceInvoker.evaluate(Unknown
>> Source)
>>        at
>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
>>        ... 31 more
>> Caused by: java.lang.ClassCastException:
>> com.cname.rules.model.common.EmployeeDetailsRulesModel cannot be cast to
>> com.cname.cbis.domain.update.Account
>>        at
>> org.drools.base.com.cname.cbis.domain.update.Account1384796854$getAccountStartDate.getValue(Unknown
>> Source)
>>        at
>> org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:87)
>>        at org.drools.rule.Declaration.getValue(Declaration.java:233)
>>        at
>> com.cname.rules.validation.business.Rule_employeeContributionStartDateAfterAccountStartDate_357b04c70dac4f469ea9cedd93d15da7Eval1InvokerGenerated.evaluate(Unknown
>> Source)
>>        at
>> com.cname.rules.validation.business.Rule_employeeContributionStartDateAfterAccountStartDate_357b04c70dac4f469ea9cedd93d15da7Eval1Invoker.evaluate(Unknown
>> Source)
>>        at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114)
>>        ... 49 more
>>
>>
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/ClassCastException-after-migrating-from-Drools-4-x-to-v5-5-tp4022292p4022382.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>
>
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