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

Mon Feb 18 02:46:14 EST 2013

stateless is just a wrapped stateful session - insert, update and delete work as normal.

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.

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
>>> 
>>> 
>>> 
>>> --
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>>> http://drools.46999.n3.nabble.com/ClassCastException-after-migrating-from-Drools-4-x-to-v5-5-tp4022292p4022382.html
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>> 
>> 
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