[rules-users] Out of Memory Issue of JBoss Enginedeployed onIBMWAS 6.0.2.7

[Dejia Wang]

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/xxxNode02Ce
ll/xxx.ear/lib/antlr-3.0ea8.jar
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5Cxxx.ear%5Clib%5Cantlr-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/xxxNode02Ce
ll/xxxApplications.ear/lib/antlr-3.0ea8.jar
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5CxxxApplications.ear%5Clib%5Cantlr-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/xxxNode02Ce
ll/xxxApplications.ear/lib/drools-compiler-3.0.jar
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5CxxxApplications.ear%5Clib%5Cdrools-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/xxxNode02Ce
ll/
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5C>  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/xxxNode02Ce
ll/
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5C>  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/xxxNode02Ce
ll/
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5C>  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/xxxNode02Ce
ll/xxxApplications.ear/lib/drools-compiler-3.0.jar
<file:///D:%5CWebSphere%5CAppServer%5Cprofiles%5CAppSrv01%5CinstalledApp
s%5CxxxNode02Cell%5CxxxApplications.ear%5Clib%5Cdrools-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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