[rules-users] OutOfMemory with BRMS 4.0.3

Wed Jan 23 06:19:34 EST 2008

Ok so yes the error is on the brms web app. The agent will poll the  
brms , so that may be causing it.

So, could you try to run the brms without the agent hitting it and see  
if it happens ( will narrow it down massively)? Also, what tomcat, jdk  
and I
Os version?

Sent from my iPhone

On 23/01/2008, at 1:54, sophie.ramel at tudor.lu wrote:

> Hello michael,
>
>> Is the rule agent running on a separate server to the brms?
> The initial configuration was:
> - BRMS in tomcat 5.5
> - server with RuleAgent in Jboss AS 3.2.8
>
> But now I moved to this configuration:
> - server with RuleAgent in Jboss AS 3.2.8 (unchanged)
> - BRMS is also in the same jboss instance
>
> And in both cases I have the problem.
>
>> Is the rule agent actually running when the error happens?
> No I don't think so.
> I don't have any exception before I try to go to a web page (either  
> of the
> BRMS, or of my other server in Jboss when the BRMS is in the same  
> jboss
> instance), and then I get OufOfMemoryError: Java heap space. The  
> RuleAgent
> is only instantiated when I send a specific request to my server  
> (and I'm
> not even sure it was called once before the last crash).
>
>> Also that is an old version  of jboss as?
> yes, it's Jboss application server 3.2.8 (I think it is the last and  
> only
> one in the 3.x series that works with JDK 1.5): I need to use an older
> version because of other compatibility issues of my server, but  
> since I
> had exactly the same problem with Tomcat, I'm beginning to think it  
> may
> not be linked to the server version ...?
>
> Regards,
>
> Sophie
>
>
>
>
> Michael Neale <michael.neale at gmail.com>
> Sent by: rules-users-bounces at lists.jboss.org
> 22/01/2008 11:31
> Please respond to
> Rules Users List <rules-users at lists.jboss.org>
>
>
> To
> Rules Users List <rules-users at lists.jboss.org>
> cc
> Rules Users List <rules-users at lists.jboss.org>
> Subject
> Re: [rules-users] OutOfMemory with BRMS 4.0.3
>
>
>
>
>
>
> Thanks sophie. A few more questions to narrow this down. Is the rule
> agent running on a separate server to the brms? Is the rule agent
> actually running when the error happens? Also that is an old version
> of jboss as?
>
> I guess the rest depends on your answers to the above.
>
> Let me know.
>
> Michael
>
>
>
> Sent from my iPhone
>
> On 21/01/2008, at 23:03, sophie.ramel at tudor.lu wrote:
>
>> Hello again,
>>
>> After coming back after almost a week without touching the server,  
>> the
>> jboss application server with the BRMS also makes a OutOfMemory
>> exception
>> when I try to use the BRMS.
>>
>>> When you get back to work if you could provide more info it would be
>> great.
>> What kind of info do you need?
>> Here is what is done in my server code, to fire the rules:
>>
>> Properties props=new Properties();
>> props.setProperty("newInstance", "false");
>> props.setProperty("url", packageURL);
>> props.setProperty("localCacheDir", cacheDir);
>> props.setProperty("poll", "30");
>> props.setProperty("name", "Agent-"+pid);
>> RuleAgent agent = RuleAgent.newRuleAgent(props);
>> RuleBase rb = agent.getRuleBase();
>> workingMemory=ruleBase.newStatefulSession();
>>
>> and then we insert all objects in the working memory with "wm.insert
>> (o);",
>> but recursively in order for all the objects to be directly
>> accessible in
>> rules (We've got a hierarchic structure, an XML file transformed in
>> Java
>> by JAXB, so the insert method tests the accessor methods of the
>> object and
>> is called recursively on the accessors' results, before inserting the
>> object).
>>
>> then we call:
>> workingMemory.fireAllRules();
>> [...interprate results...]
>> workingMemory.dispose();
>>
>>
>> Best regards,
>>
>> Sophie
>>
>>
>>
>> Michael Neale <michael.neale at gmail.com>
>> Sent by: rules-users-bounces at lists.jboss.org
>> 17/01/2008 23:34
>> Please respond to
>> Rules Users List <rules-users at lists.jboss.org>
>>
>>
>> To
>> Rules Users List <rules-users at lists.jboss.org>
>> cc
>> Rules Users List <rules-users at lists.jboss.org>
>> Subject
>> Re: [rules-users] OutOfMemory with BRMS 4.0.3
>>
>>
>>
>>
>>
>>
>> Thanks sophie. Any oome I will investigate it just takes time to find
>> them. I have been running some overnight tests myself today. When you
>> get back to work if you could provide more info it would be great.
>>
>> If the agent is running then it polls the brms. So that could be one
>> of the possible causes.
>>
>> Sent from my iPhone
>>
>> On 17/01/2008, at 22:44, sophie.ramel at tudor.lu wrote:
>>
>>> Hi Michael,
>>>
>>> I'm not at my company these days so I cannot check or make further
>>> tests.
>>> But yes, we use a rule agent and an URL to query the rule.
>>> And it happens after 1-2 days whether we use the system or not, it
>>> doesn't
>>> seem to make any difference.
>>>
>>> however, I'll check when returning, but I think it still worked
>>> after a few
>>> days, now that I have moved the BRMS to the Jboss 3.2.3 app server.
>>>
>>> thanks for trying to help me!
>>>
>>> Sophie
>>>
>>> -----rules-users-bounces at lists.jboss.org wrote: -----
>>>
>>> To: "Rules Users List" <rules-users at lists.jboss.org>
>>> From: "Michael Neale" <michael.neale at gmail.com>
>>> Sent by: rules-users-bounces at lists.jboss.org
>>> Date: 01/17/2008 12:52AM
>>> Subject: Re: [rules-users] OutOfMemory with BRMS 4.0.3
>>>
>>> Hi Sophie - how is the jboss "runtime" server querying this? via the
>>> rule
>>> agent (and a URL)?
>>>
>>> just trying to work out what the usage pattern is so we can
>>> reproduce it.
>>>
>>> Michael.
>>>
>>>
>>> On Jan 11, 2008 12:20 AM,  <
>>> sophie.ramel at tudor.lu
>>>> wrote:
>>>
>>> Hello,
>>>
>>> I am using Drools BRMS 4.0.3 with tomcat 5.5.25, and I get
>>> OutOfMemory
>>> exceptions in tomcat regularly.
>>>
>>> I recently changed the java option of tomcat to add "-Xmx512m", but
>>> it
>>> only resulted in taking a little more time before crashing (3 days,
>>> instead of 1 before).
>>> The server has nearly no access - it's a development server which is
>>> not a
>>> lot used at the moment - and there are only a few rules, for tests,
>>> so I
>>> really don't understand this error. I'm using java
>>> 1.5.0 on a linux
>>> server.
>>>
>>> The BRMS is accessed by web, to create and deploy the rules, and
>>> queried
>>> from another tool (on the same machine but in another server: in
>>> JBoss),
>>> to insert data in a workingMemory and execute the rules from the
>>> deployed
>>> package URL. I call the dispose() method on the StatefulSession at
>>> the end
>>> of the query (but this shouldn't be linked to this error, since this
>>> is in
>>> JBoss and the OutOfMemory occurs in tomcat...).
>>>
>>> Any idea?
>>> Thanks,
>>>
>>> Sophie
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>>
>>>
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>
>>>
>>>
>>> --
>>> Michael D Neale
>>> home:
>>> www.michaelneale.net
>>>
>>> blog:
>>>
>>> michaelneale.blogspot.com
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users