[rules-dev] Possible memory leak in Drools 6.0.1
Wolfgang Laun
wolfgang.laun at gmail.com
Wed Apr 2 08:20:11 EDT 2014
I would try and put all constraints under a joined section of row cells with
a single Position pattern. That's the proper way to do it and to avoid all
overhead.
-W
On 02/04/2014, kellyajp <kellyajp at yahoo.co.uk> wrote:
> Yes we feed the positions into the StatefulSession one at a time.
>
> Is there a difference in how these rules would be treated in Drools 5 and
> Drool 6. I've hap dumped both instances and there is a huge difference in
> the number of RighTuple instances being generated in each. The data and
> rules are exactly the same in both instances. The only option I have is to
> roll back to the old drools version if we can't resolve the issue; the
> problem there is that this version dose not include the Mvel fix to stop the
> jvm freezing. Do you have any suggestions?
>
> Thanks
>
> ________________________________
> From: Mark Proctor [via Drools] <ml-node+s46999n4029081h76 at n3.nabble.com>
> To: kellyajp <kellyajp at yahoo.co.uk>
> Sent: Wednesday, 2 April 2014, 12:41
> Subject: Re: Possible memory leak in Drools 6.0.1
>
>
>
> not sure why this would have a memory leak, it all looks quite straight
> forward joins.
>
> I assume you are using stateless sessions and inserting just a single
> Position instance? Is there a different number of RT's after a single
> Position insert?
>
> A small tip, you don't need so many patterns. All those constraints can go
> in a single Pattern.
>
> Mark
>
>
>
>
> On 2 Apr 2014, at 11:20, kellyajp <[hidden email]> wrote:
>
> Morning Mark,
>>
>>
>>That was a useful exercise!!, from a sampled set it looks like the
>> RightTuple instances are coming from a single rule package (nccf).
>>
>>
>>This rule package comes from a large decision table of that is maintained
>> by our business users. This results in a large DRL file being generated
>> containing 2371 rules.
>>
>>
>>Below I have included some of the rules that were referenced in the data
>> structures, I have also attached the generated DRL file.
>>
>>
>>The exact same file processes in Drools 5 but fails in Drools 6.
>>
>>
>>31usd_lng_corp_bnd_cr_bbb_usd_over0y_under5y_2
>>// rule values at A650, header at A644
>>rule "31usd_lng_corp_bnd_cr_bbb_usd_over0y_under5y_2"
>> salience 64886
>> when
>> p: Position(positionDetail!=null && positionDetail.valuation !=
>> null && positionDetail.valuation.mtmValue >=0)
>> Position(positionDetail.productHierarchy != null &&
>> positionDetail.productHierarchy.rbcProductClass == "securities")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate >=positionDetail.riskBusinessDate)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> <positionDetail.riskBusinessDate+157680000000)
>> Position(positionDetail.Valuation!= null && positionDetail.
>> Valuation.ValuationCurrency == "USD")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.marketSectorDescription == "corp")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.typeOfBond != null &&
>> positionDetail.instrument.typeOfBond not in ('convertible','covered'
>> ,'jumbo pfandbriefe'))
>> Position(positionDetail.overallCreditQualityStep == 2)
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.riskProductType == 'UNKNOWN')
>> then
>> result.add(classification=new
>> ActionParametersImpl('BaselineClassification'));
>> classification.setBaseline('NCCF');
>> classification.setLineId("NCCF0100579");
>> classification.setObject(p);
>> classification.setPositionId(p.getPositionId());
>> classification.setDataStatus(p.getDataStatus());
>>
>> classification.setCountry(p.getPositionDetail().getBook().getTransit().getLegalEntityCountry());
>> classification.setRulePath(ruleHistory.getActivationPath());
>> classification.add(a=new ActionParametersImpl( 'BaselineValue'));
>> a.setValueName( 'Balance');
>> a.setValue( p.getPositionDetail().getValuation().getMtmValue());
>> a.setCurrency(
>> p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineTimeBucket'));
>> a.setBaselineType( 'MB');
>> a.setValue(p.getPositionDetail().getValuation().getMtmValue());
>>
>> a.setCurrency(p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>>end
>>
>>
>>
>>
>>31usd_lng_corp_bnd_cr_bbb_usd_over0y_under10y_2
>>// rule values at A652, header at A644
>>rule "31usd_lng_corp_bnd_cr_bbb_usd_over5y_under10y_2"
>> salience 64884
>> when
>> p: Position(positionDetail!=null && positionDetail.valuation !=
>> null && positionDetail.valuation.mtmValue >=0)
>> Position(positionDetail.productHierarchy != null &&
>> positionDetail.productHierarchy.rbcProductClass == "securities")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> >=positionDetail.riskBusinessDate+157680000000)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> <positionDetail.riskBusinessDate+315360000000)
>> Position(positionDetail.Valuation!= null && positionDetail.
>> Valuation.ValuationCurrency == "USD")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.marketSectorDescription == "corp")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.typeOfBond != null &&
>> positionDetail.instrument.typeOfBond not in ('convertible','covered'
>> ,'jumbo pfandbriefe'))
>> Position(positionDetail.overallCreditQualityStep == 2)
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.riskProductType == 'UNKNOWN')
>> then
>> result.add(classification=new
>> ActionParametersImpl('BaselineClassification'));
>> classification.setBaseline('NCCF');
>> classification.setLineId("NCCF0100581");
>> classification.setObject(p);
>> classification.setPositionId(p.getPositionId());
>> classification.setDataStatus(p.getDataStatus());
>>
>> classification.setCountry(p.getPositionDetail().getBook().getTransit().getLegalEntityCountry());
>> classification.setRulePath(ruleHistory.getActivationPath());
>> classification.add(a=new ActionParametersImpl( 'BaselineValue'));
>> a.setValueName( 'Balance');
>> a.setValue( p.getPositionDetail().getValuation().getMtmValue());
>> a.setCurrency(
>> p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineTimeBucket'));
>> a.setBaselineType( 'MB');
>> a.setValue(p.getPositionDetail().getValuation().getMtmValue());
>>
>> a.setCurrency(p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>>end
>>
>>
>>
>>
>>31usd_lng_corp_bnd_cr_bbb_usd_over5y_under10y_1
>>// rule values at A651, header at A644
>>rule "31usd_lng_corp_bnd_cr_bbb_usd_over5y_under10y_1"
>> salience 64885
>> when
>> p: Position(positionDetail!=null && positionDetail.valuation !=
>> null && positionDetail.valuation.mtmValue >=0)
>> Position(positionDetail.productHierarchy != null &&
>> positionDetail.productHierarchy.rbcProductClass == "securities")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> >=positionDetail.riskBusinessDate+157680000000)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> <positionDetail.riskBusinessDate+315360000000)
>> Position(positionDetail.Valuation!= null && positionDetail.
>> Valuation.ValuationCurrency == "USD")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.marketSectorDescription == "corp")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.typeOfBond != null &&
>> positionDetail.instrument.typeOfBond not in ('convertible','covered'
>> ,'jumbo pfandbriefe'))
>> Position(positionDetail.overallCreditQualityStep == 2)
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.riskProductType != 'UNKNOWN')
>> then
>> result.add(classification=new
>> ActionParametersImpl('BaselineClassification'));
>> classification.setBaseline('NCCF');
>> classification.setLineId("NCCF0100581");
>> classification.setObject(p);
>> classification.setPositionId(p.getPositionId());
>> classification.setDataStatus(p.getDataStatus());
>>
>> classification.setCountry(p.getPositionDetail().getBook().getTransit().getLegalEntityCountry());
>> classification.setRulePath(ruleHistory.getActivationPath());
>> classification.add(a=new ActionParametersImpl( 'BaselineValue'));
>> a.setValueName( 'Balance');
>> a.setValue( p.getPositionDetail().getValuation().getMtmValue());
>> a.setCurrency(
>> p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineCashflow'));
>> a.setCashflowType( 'SETTLEMENT, Settlement');
>> a.setList(p.getPositionDetail().getCashFlows());
>> a.setDefaultDaysToCashFlow (1);
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineCashflow'));
>> a.setBaselineType( 'CB');
>> a.setCashflowType( 'Principal, Interest');
>> a.setList(p.getPositionDetail().getCashFlows());
>> a.setDefaultDaysToCashFlow (15000);
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineTimeBucket'));
>> a.setBaselineType( 'MB');
>> a.setValue(p.getPositionDetail().getValuation().getMtmValue());
>>
>> a.setCurrency(p.getPositionDetail().getValuation().getValuationCurrency());
>>
>> a.setDate(p.getPositionDetail().getInstrument().getMaturityDate());
>> a.setDefaultDaysToCashFlow (15000);
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>>end
>>
>>
>>
>>
>>08eur_la_lng_qual_mkt_sec_agncy_dbt_7y_Under_10Y_5
>>// rule values at A954, header at A921
>>rule "08eur_la_lng_qual_mtk_sec_agncy_dbt_7Y_under_10Y_5"
>> salience 64582
>> when
>> p: Position(positionDetail!=null && positionDetail.valuation !=
>> null && positionDetail.valuation.mtmValue >=0)
>> Position(positionDetail.productHierarchy != null &&
>> positionDetail.productHierarchy.rbcProductClass == "securities")
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.countryOfDomicile in
>> ('AT','BE','BG','CY','CZ','DE','DK','EE','ES','FI','FR' ,'GB','GR' ,'HU'
>> ,'IE' ,'IS' ,'IT' ,'LI' ,'LT' ,'LU' ,'LV' ,'MT' ,'NL' ,'NO' ,'PL' ,'PT'
>> ,'RO' ,'SE' ,'SI' ,'SK'))
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.countryOfIncorporation in ('AT' ,'BE' ,'BG' ,
>> 'CY' ,'CZ' ,'DE' , 'DK' ,'EE' ,'ES', 'FI' ,'FR' ,'GB' , 'GR' ,'HU' ,'IE'
>> , 'IS' ,'IT' ,'LI' , 'LT' ,'LU' ,'LV' , 'MT' ,'NL' ,'NO' , 'PL' ,'PT'
>> ,'RO','SE' ,'SI' ,'SK'))
>> Position(positionDetail.Valuation!= null && positionDetail.
>> Valuation.ValuationCurrency == "EUR")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.collateralType in ('govt liquid gtd','us govt
>> guarant','u.s. government guarantee'))
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> >=positionDetail.riskBusinessDate+220752000000)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> <positionDetail.riskBusinessDate+315360000000)
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.riskProductType != 'UNKNOWN')
>> then
>> result.add(classification=new
>> ActionParametersImpl('BaselineClassification'));
>> classification.setBaseline('NCCF');
>> classification.setLineId("NCCF0100405");
>> classification.setObject(p);
>> classification.setPositionId(p.getPositionId());
>> classification.setDataStatus(p.getDataStatus());
>>
>> classification.setCountry(p.getPositionDetail().getBook().getTransit().getLegalEntityCountry());
>> classification.setRulePath(ruleHistory.getActivationPath());
>> classification.add(a=new ActionParametersImpl( 'BaselineValue'));
>> a.setValueName( 'Balance');
>> a.setValue( p.getPositionDetail().getValuation().getMtmValue());
>> a.setCurrency(
>> p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineCashflow'));
>> a.setCashflowType( 'SETTLEMENT, Settlement');
>> a.setList(p.getPositionDetail().getCashFlows());
>> a.setDefaultDaysToCashFlow (1);
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineCashflow'));
>> a.setBaselineType( 'CB');
>> a.setCashflowType( 'Principal, Interest');
>> a.setList(p.getPositionDetail().getCashFlows());
>> a.setDefaultDaysToCashFlow (15000);
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineTimeBucket'));
>> a.setBaselineType( 'MB');
>> a.setValue(p.getPositionDetail().getValuation().getMtmValue());
>>
>> a.setCurrency(p.getPositionDetail().getValuation().getValuationCurrency());
>>
>> a.setDate(p.getPositionDetail().getInstrument().getMaturityDate());
>> a.setDefaultDaysToCashFlow (15000);
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>>end
>>
>>
>>18cad_lng_sec_iss_prov_over10Y_under35Y_2
>>// rule values at A152, header at A138
>>rule "18cad_lng_sec_iss_prov_over10y_under35y_2"
>> salience 65384
>> when
>> p: Position(positionDetail!=null && positionDetail.valuation !=
>> null && positionDetail.valuation.mtmValue >=0)
>> Position(positionDetail.productHierarchy != null &&
>> positionDetail.productHierarchy.rbcProductClass == "securities")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> >=positionDetail.riskBusinessDate+315360000000)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.maturityDate
>> <positionDetail.riskBusinessDate+1103760000000)
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.issuerTicker in ('BRCOL','BcpIPB','ALTA','SCDA'
>>,'MP','MANPAC','MPTB','ONTW'
>>,'ONT','ONTB','ONTPAC','Q'
>>,'QTB','QUEPAC','QW','NBRNS'
>>,'NS','PRINCE','NF','NFTB'))
>> Position(positionDetail.Valuation!= null && positionDetail.
>> Valuation.ValuationCurrency == "CAD")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.issuerIndustry == "govt regional")
>> Position(positionDetail.instrument != null &&
>> positionDetail.instrument.marketSectorDescription == "govt")
>> Position(positionDetail.valuationType in ('Valuation','Both'))
>> Position(positionDetail.riskProductType == 'UNKNOWN')
>> then
>> result.add(classification=new
>> ActionParametersImpl('BaselineClassification'));
>> classification.setBaseline('NCCF');
>> classification.setLineId("NCCF0100341");
>> classification.setObject(p);
>> classification.setPositionId(p.getPositionId());
>> classification.setDataStatus(p.getDataStatus());
>>
>> classification.setCountry(p.getPositionDetail().getBook().getTransit().getLegalEntityCountry());
>> classification.setRulePath(ruleHistory.getActivationPath());
>> classification.add(a=new ActionParametersImpl( 'BaselineValue'));
>> a.setValueName( 'Balance');
>> a.setValue( p.getPositionDetail().getValuation().getMtmValue());
>> a.setCurrency(
>> p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>> classification.add(a=new ActionParametersImpl(
>> 'BaselineTimeBucket'));
>> a.setBaselineType( 'MB');
>> a.setValue(p.getPositionDetail().getValuation().getMtmValue());
>>
>> a.setCurrency(p.getPositionDetail().getValuation().getValuationCurrency());
>> a.setNettingType('Security');
>> a.setAdjustmentType('Fungible Long covers Fungible Short,Fungible
>> Short covers Fungible Long');
>> a.setBucket('Total');
>>end
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>________________________________
>> From: Mark Proctor [via Drools] <<a
>> href="x-msg://43/user/SendEmail.jtp?type=node&node=4029078&i=0"
>> target="_top" rel="nofollow" link="external">[hidden email]>
>>To: kellyajp <<a
>> href="x-msg://43/user/SendEmail.jtp?type=node&node=4029078&i=1"
>> target="_top" rel="nofollow" link="external">[hidden email]>
>>Sent: Tuesday, 1 April 2014, 14:10
>>Subject: Re: Possible memory leak in Drools 6.0.1
>>
>>
>>
>>any news?
>>
>>
>>Mark
>>
>>On 30 Mar 2014, at 13:38, Mark Proctor <[hidden email]> wrote:
>>
>>
>>
>>On 30 Mar 2014, at 13:26, kellyajp <[hidden email]> wrote:
>>
>>I'll get that to you on Monday
>>
>>On 30 Mar 2014, at 12:59, "Mark Proctor [via Drools]" <<a
> href="<a
> href="x-msg://133/user/SendEmail.jtp?type=node&amp;node=4029027&amp;i=0">x-msg://133/user/SendEmail.jtp?type=node&node=4029027&i=0"
> target="_top" rel="nofollow" link="external">[hidden email]> wrote:
>>
>>
>>Are you able to isolate what the FH's are referencing, Sorry that should be
>> RT, not FH. RT == RightTuple, FH == FactHandle.
>>
>>that might give us an idea of where to look. If you look RightTuple's they
>> will have a 'sink' reference (network node) and that sink will have an
>> 'associates' map. That map is the rules that node is part of. You can use
>> this to identify the offending rule(s), and maybe paste those rules here?
>>>>
>>>>
>>>>Mark
>>>>
>>>>On 30 Mar 2014, at 09:03, kellyajp <<a href="<a
>>>> href="x-msg://133/user/SendEmail.jtp?type=node&amp;node=4029026&amp;i=0">x-msg://133/user/SendEmail.jtp?type=node&node=4029026&i=0"
>>>> target="_top" rel="nofollow" link="external">[hidden email]> wrote:
>>>>
>>>>Thanks
>>>>>
>>>>>
>>>>>I'll get someone from the team to work on this on Monday. Not sure how
>>>>> easy it will be to isolate but will keep you informed.
>>>>>
>>>>>
>>>>>Andy
>>>>>On 28 Mar 2014, at 23:52, "Mark Proctor [via Drools]" <<a href="<a
>>>>> href="<a
>>>>> href="x-msg://131/user/SendEmail.jtp?type=node&amp;amp;node=4029025&amp;amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&amp;node=4029025&amp;i=0"><a
>>>>> href="x-msg://131/user/SendEmail.jtp?type=node&amp;node=4029025&amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&node=4029025&i=0"
>>>>> target="_top" rel="nofollow" link="external">[hidden email]> wrote:
>>>>>
>>>>>
>>>>>Can you get us a unit test demonstrating this, and we'll look into it as
>>>>> a priority.
>>>>>>
>>>>>>Mark
>>>>>>On 28 Mar 2014, at 15:40, kellyajp <<a href="<a href="<a
>>>>>> href="x-msg://131/user/SendEmail.jtp?type=node&amp;amp;node=4029018&amp;amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&amp;node=4029018&amp;i=0"><a
>>>>>> href="x-msg://131/user/SendEmail.jtp?type=node&amp;node=4029018&amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&node=4029018&i=0"
>>>>>> target="_top" rel="nofollow" link="external">[hidden email]> wrote:
>>>>>>
>>>>>>
>>>>>>> We have upgraded from Drools 5 -> Drools 6.01 and when repeating
>>>>>>> the
>>>>>>> processing in each environment we have very different object counts
>>>>>>> that is
>>>>>>> causing memory to run out on Drools 6:
>>>>>>>
>>>>>>> Below is an extract from a heap dump
>>>>>>>
>>>>>>> In Drools 6 the main objects in the heap are
>>>>>>> 1: 4378006 700480960 org.drools.core.reteoo.RightTuple
>>>>>>>
>>>>>>> Where as in Drools 5 there are way less objects
>>>>>>> 92: 19022 1826112 org.drools.reteoo.RightTuple
>>>>>>>
>>>>>>> Has anyone else had any experience of this issue?
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> View this message in
>>>>>>> context: http://drools.46999.n3.nabble.com/Possible-memory-leak-in-Drools-6-0-1-tp4029010.html
>>>>>>> Sent from the Drools: Developer (committer) mailing list mailing list
>>>>>>> archive at Nabble.com.
>>>>>>> _______________________________________________
>>>>>>> rules-dev
> mailing list
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>>>>>>> href="x-msg://131/user/SendEmail.jtp?type=node&amp;node=4029018&amp;i=1">x-msg://131/user/SendEmail.jtp?type=node&node=4029018&i=1"
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>>>>>>
>>>>>>>>>>>________________________________
>>>>>>
>>>>>>If you reply to this email, your message will be added to the
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>>>>>>NAML
>>>>>>>>>________________________________
>>>>>View this message in context: Re: Possible memory leak in Drools 6.0.1
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>>>>>rules-dev mailing list
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>>>>>>>________________________________
>>>>
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>>>>>________________________________
>>> View this message in context: Re: Possible memory leak in Drools 6.0.1
>>>Sent from the Drools: Developer (committer) mailing list mailing list
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