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

Wolfgang Laun wolfgang.laun at gmail.com
Mon Feb 18 04:31:34 EST 2013 

I'll insert a sentence stating that all the RHS operations
insert/modify/delete are still possible. The strong negative in the
quoted sentence needs to be balanced.
-W

On 18/02/2013, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
> Mark,
>
> On 18/02/2013, Mark Proctor <mproctor at codehaus.org> wrote:
>> stateless is just a wrapped stateful session - insert, update and delete
>> work as normal.
>
> So let's get this straight, this quote from the "Expert" manual which
> does NOT refer to sequential mode!!) is wrong and should be removed:
> <quote>
> Stateless sessions do not support iterative insertions and the method
> call fireAllRules() from Java code;
> </quote>
>
>>
>> For "sequential" mode, inserts will reach the right input of a beta node
>> and
>> then just do nothing - as all the beta network evaluation has been done.
>
> Which I take it to mean that you can do insert (and retract? and
> modify?) but it will not work as intended? Without error indication??
>
> -W
>
>>
>> Mark
>> On 18 Feb 2013, at 07:17, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
>>
>>> 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.
>>>>> _______________________________________________
>>>>> rules-users mailing list
>>>>> rules-users at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
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>>
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