[rules-users] OutOfMemory with BRMS 4.0.3

Wed Jan 30 04:59:43 EST 2008

Hi Sophie. We have run the BRMS for some time now, - not able to see this.
If its still happening - are you able to share the log file for the server
with us at all?
Michael.

On Jan 23, 2008 10:29 PM, <sophie.ramel at tudor.lu> wrote:

> Well, I'm pretty sure no agent hit the brms on my server last week, it's a
> development server and I'm currently the only one using it, so the agent
> wasn't instantiated (or perhaps I tried it once or twice at the beginning
> of the week, to check that it worked, but that's all).
>
> The tomcat version was tomcat 5.5 (but here again, the error also occurs
> in Jboss 3.2.8), jdk is jdk 1.5.0 , and the system is an old Red Hat 7.2.
>
> Regards,
>
> Sophie
>
>
>
>
> Michael Neale <michael.neale at gmail.com>
> Sent by: rules-users-bounces at lists.jboss.org
> 23/01/2008 12:39
> 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
>
>
>
>
>
>
> 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
> >>>
> >>>
> >>> _______________________________________________
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> >>> https://lists.jboss.org/mailman/listinfo/rules-users
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> >>
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-- 
Michael D Neale
home: www.michaelneale.net
blog: michaelneale.blogspot.com
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