[rules-users] Out of Memory Issue of JBoss EnginedeployedonIBMWAS 6.0.2.7

Mon Jan 22 14:47:33 EST 2007

Millions of business rules per day.

- Dejia

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From: Joel G. Rivera-González [mailto:el_pio at yahoo.com] 
Sent: Tuesday, January 16, 2007 11:19 AM
To: Rules Users List
Subject: Re: [rules-users] Out of Memory Issue of JBoss EnginedeployedonIBMWAS 6.0.2.7

quick question about this...
how many rules do you run on your app?

Joel G. Rivera-Gonzalez
PRT

----- Original Message ----
From: Dejia Wang <Dejia.Wang at tdemand.com>
To: Rules Users List <rules-users at lists.jboss.org>
Sent: Tuesday, January 16, 2007 2:28:14 PM
Subject: RE: [rules-users] Out of Memory Issue of JBoss Enginedeployed onIBMWAS 6.0.2.7

Thanks Mark. However, with the OOM issue in JBoss Rules 3.0.5, we cannot really use it in enterprise environment.  It would be good if we can get 3.0.6 out sooner.

BTW, have your guys check in the fix? Is there anything we can help to get 3.0.6 out sooner?

Thanks- Dejia

  _____  

From: Mark Proctor [mailto:mproctor at codehaus.org] 
Sent: Monday, January 15, 2007 6:33 PM
To: Rules Users List
Subject: Re: [rules-users] Out of Memory Issue of JBoss Enginedeployed onIBMWAS 6.0.2.7

Antlr  2.7.7 is just for the StringTemplate stuff, we are actually using Antlr 3. You could attempt to regenerate the grammar again with latest versions of antlrworks and antlr, although I'm not sure if it works without updates to the drl. Not sure when 3.0.6 will be out, probably not for a few weeks.

Mark
Dejia Wang wrote: 

BTW, I noticed that current stable version of antlr is 2.7.7 (released November 1, 2006). Rule 3.0.5 has 2.7.6.

Edson, will antlr 2.7.7 work?

Thanks- Dejia

  _____  

From: Dejia Wang 
Sent: Monday, January 15, 2007 5:40 PM
To: 'Rules Users List'
Subject: RE: [rules-users] Out of Memory Issue of JBoss Engine deployed onIBMWAS 6.0.2.7

This is good news. Thanks very much, Mark and Edson! BTW, when will 3.0.6 release be out? 

- Dejia

  _____  

From: Mark Proctor [mailto:mproctor at codehaus.org] 
Sent: Monday, January 15, 2007 4:33 PM
To: Rules Users List
Subject: Re: [rules-users] Out of Memory Issue of JBoss Engine deployed onIBMWAS 6.0.2.7

I believe this was a bug  in antlr that is now fixed. I'll see if we can get a 3.0.6 release done some time updated to the latest antlr. Edson knows more about this, as it was a bug he investigated.

Mark
Dejia Wang wrote: 

BTW, I am using the JBoss Rules 3.0.5.

  _____  

From: Dejia Wang 
Sent: Monday, January 15, 2007 3:56 PM
To: rules-users at lists.jboss.org
Subject: [rules-users] Out of Memory Issue of JBoss Engine deployed on IBMWAS 6.0.2.7
Importance: High

Hi All, 

I ran into OOM (Out of Memory) issue of JBoss Rule Engine deployed on IBM WAS 6.0.2.7. Below is the log

...

[Loaded org.antlr.runtime.DFA from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/xxx.ear/lib/antlr-3.0ea8.jar]

[Loading superclass and interfaces of org/antlr/runtime/DFA]

[Preparing org/antlr/runtime/DFA]

[Loaded org.antlr.runtime.DFA$State from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/xxxApplications.ear/lib/antlr-3.0ea8.jar]

[Loading superclass and interfaces of org/antlr/runtime/DFA$State]

[Loaded org.drools.lang.RuleParserLexer$1 from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$1]

[Loaded org.drools.lang.RuleParserLexer$2 from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$2]

[Loaded org.drools.lang.RuleParserLexer$3 from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$3]

[Loaded org.drools.lang.RuleParserLexer$4 from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$4]

....

[Loaded org.drools.lang.RuleParserLexer$228 from file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Cell/xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$228]

...

It looks like it loaded the same class hundreds of times until it exhausts the memory.

Any idea why this happens and how to fix this?

Thanks- Dejia

  _____  

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