Re: [rules-dev] Possible memory leak in Drools 6.0.1

Wednesday, 2 April 2014

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(a)n3.nabble.com&gt;
To: kellyajp <kellyajp(a)yahoo.co.uk&gt; 
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&amp;node=4029078&amp;i=0"
target="_top" rel="nofollow" link="external">[hidden
email]>
To: kellyajp <<a
href="x-msg://43/user/SendEmail.jtp?type=node&amp;node=4029078&amp;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;amp;node=4029027&amp;amp;i=0">x-msg://133/user/SendEmail.jtp?type=node&amp;node=4029027&amp;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;amp;node=4029026&amp;amp;i=0">x-msg://133/user/SendEmail.jtp?type=node&amp;node=4029026&amp;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;amp;node=4029025&amp;amp;amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&amp;amp;node=4029025&amp;amp;i=0"><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"
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;amp;node=4029018&amp;amp;amp;i=0">x-msg://131/user/SendEmail.jtp?type=node&amp;amp;node=4029018&amp;amp;i=0"><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"
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...
>>>>> Sent from the Drools: Developer (committer) mailing list mailing list
archive at Nabble.com. 
>>>>> _______________________________________________ 
>>>>> rules-dev  mailing list 
...
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>>>>> https://lists.jboss.org/mailman/listinfo/rules-dev_______________________________________________ rules-dev
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>>>>
>>>>>>>>>________________________________
>>>>
>>>>If you reply to this email, your message will be added to the discussion
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>>>>To unsubscribe from Possible memory leak in Drools 6.0.1, click here.
>>>>NAML
>>>>>>>________________________________
>>>View this message in context: Re: Possible memory leak in Drools 6.0.1
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>>>_______________________________________________
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>>To unsubscribe from Possible memory leak in Drools 6.0.1, click here.
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Re: [rules-dev] Possible memory leak in Drools 6.0.1