[rules-users] ClassCastException and "from collect" keyword issue?

[Tan, Kevin]

Hi Wolfgang,

Thanks for your reply. Yes - this is the only place where both d2.rules.state.EvaluateRule and d2.autorating.data.model.Account are referenced. That's why we finally locate the classcastexception in this line:

Account acct = (Account) obj;

The weird thing is we are not able to replicate this error during the second time run in our program. We also searched and found some similar issues:

http://drools.46999.n3.nabble.com/accumulate-vs-collect-td1884308.html
http://lists.jboss.org/pipermail/rules-users/2009-June/009484.html
http://drools.46999.n3.nabble.com/unexpected-ClassCastException-when-dealing-with-sliding-windows-td1692092.html

Please advise. 

-Kevin

-----Original Message-----
From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: Thursday, January 31, 2013 10:29 AM
To: Rules Users List
Subject: Re: [rules-users] ClassCastException and "from collect" keyword issue?

Is rule "EXC_COLLAT_HOLDING_ARRANGEMENT" *absolutely* the only one where both d2.rules.state.EvaluateRule and d2.autorating.data.model.Account are referenced?
-W

On 31/01/2013, Tan, Kevin <Kevin.Tan at morganstanley.com> wrote:
> Hi rules users,
>
> I am having a problem with Drools 5.1.1 recently. The exception we had is:
>
> java.lang.ClassCastException:
> d2.rules.state.EvaluateRule cannot be cast to 
> d2.autorating.data.model.Account
> org.drools.runtime.rule.ConsequenceException: rule:
> DERIVE_COLLAT_MECHANISM_PLEDGE
>
> Our rules are listed as below:
>
> //////////////////////////////////////////////////////////////////////
> //////////////////////////////////////////////////////////////////////
> //////////////////
> rule "DERIVE_COLLAT_MECHANISM_PLEDGE"
> no-loop true
> salience 19991
>     when
>        $RatingData : RatingRuleFact()
>        $contract : Contract()
>        $csaDoc : Document(documentId == $contract.csaId && status ==
> "Final/Signed")
>        (EvaluateRule(ruleName == "INSCOPE))
>     then
>         RuleProcessingOutput ruleOutput = $RatingData.getRuleOutput();
>         RuleResult result = new RuleResult(drools.getRule().getName(),
> $contract.getContractId(), $RatingData.getPrincipalPartyCountry());
>         ruleOutput.addRuleResult(result);
>         $contract.setCollateralMechanism(result.getRuleOutputText());
>         insertLogical(new EvaluateRule(drools.getRule().getName()));
> end
>
> rule "EXC_COLLAT_HOLDING_ARRANGEMENT"
> no-loop true
> salience 19985
>     when
>        $RatingData : RatingRuleFact()
>        $contract : Contract()
>        $noHoldingAgreementAccts : ArrayList()
>        from collect ( Account(collatNetId == $contract.contractId,
>                     businessUnit not in ("COMM", "FID", "FX", "IED", 
> "SECLENDING", "SWAPS")) from $contract.collatAccounts
>        )
>        EvaluateRule(ruleName == "INSCOPE")
>     then
>         RuleProcessingOutput ruleOutput = $RatingData.getRuleOutput();
>         for (Object obj : $noHoldingAgreementAccts) {
>             Account acct = (Account) obj;
>             if (acct.getDp2Account() != null) {
>                 RuleResult result = new 
> RuleResult(drools.getRule().getName(), $contract.getContractId(), 
> $RatingData.getPrincipalPartyCountry());
>                 result.setAccountId(acct.getDp2Account().getAccountId());
>                 result.setRuleOutputText("BU has no Data");
>                 ruleOutput.addRuleResult(result);
>             }
>         }
>         if ($noHoldingAgreementAccts.size() > 0) {
>             insertLogical(new EvaluateRule(drools.getRule().getName()));
>         }
> end
> //////////////////////////////////////////////////////////////////////
> //////////////////////////////////////////////////////////////////////
> //////////////////
>
>
> *         In object Account(), we did not have any EvaluateRule() object in
> it.
>
> *         We also noticed after the "from collect" key word there are
> EvaluateRule() object defined after it(but the purpose is just to 
> determine if this object exist or not in the Working Memory), in the 
> LHS of each rule file.
>
> *         In the variable $noHoldingAgreementAccts, we are not supposed to
> see the object - EvaluateRule (BUT the exception is showing it is 
> trying to cast EvaluateRule into Account)
>
>
> My question is are there any known problems/issues with the following
>
> -          Drools rule compilers
>
> -          Key word from collect
>
> -          Rules production memory
>
> -          Version 5.1.1
>
> that can make this happen? Any ideas will be appreciated. Thanks.
>
>
> Kevin Tan
> Morgan Stanley | Enterprise Data & Services
> 700 Rue Wellington | Floor 04
> Montreal, QC H3C 3S4
> Phone: +1 514 876-5756
> Kevin.Tan at morganstanley.com<mailto:Thanh.Dang at morganstanley.com>
>
>
>
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NOTICE: Morgan Stanley is not acting as a municipal advisor and the opinions or views contained herein are not intended to be, and do not constitute, advice within the meaning of Section 975 of the Dodd-Frank Wall Street Reform and Consumer Protection Act. If you have received this communication in error, please destroy all electronic and paper copies and notify the sender immediately. Mistransmission is not intended to waive confidentiality or privilege. Morgan Stanley reserves the right, to the extent permitted under applicable law, to monitor electronic communications. This message is subject to terms available at the following link: http://www.morganstanley.com/disclaimers. If you cannot access these links, please notify us by reply message and we will send the contents to you. By messaging with Morgan Stanley you consent to the foregoing.