Just to let people know, I've worked around this by only creating one SessionConfig object and caching it i.e "StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession((KnowledgeSessionConfiguration)getSessionConfig());". <div>
<br></div><div>What seemed to be happening was ChainedProperties was trying Classloader lookups that were very slow when running in an OSGi environment.<div><br></div><div>Also with how the OSGi bundles are built the org.drools package is split and it makes it difficult to load up certain classes. I ended up having to use reflection to load up the SessionConfiguration class from a specific bundle. Maybe it's to do with how I'm importing the drools bundles into my project but it's one to watch out for if your using drools with OSGi.</div>
<div><br></div><div>Thanks,</div><div>Dave <br><br><div class="gmail_quote">On 10 August 2010 17:46, David Conde <span dir="ltr"><<a href="mailto:dconde@calomtech.com">dconde@calomtech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
ChainedProperties lives in org.drools.util.ChainedProperties and is created in SessionConfiguration(). The call is called during StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();.<div><div></div><div class="h5">
<br><br><div class="gmail_quote">
On 10 August 2010 17:36, Pavel Tavoda <span dir="ltr"><<a href="mailto:pavel.tavoda@gmail.com" target="_blank">pavel.tavoda@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Can't you avoid using ChainedProperties, what is it? Can you send<br>
piece of code where you create session?<br>
<br>
Pavel<br>
<br>
<br>
2010/8/10 David Conde <<a href="mailto:dconde@calomtech.com" target="_blank">dconde@calomtech.com</a>>:<br>
<div><div></div><div>> Hi Pavel,<br>
> I've changed it over to use a stateless session and I'm seeing the<br>
> same behavior. I've done some debugging and it seems to be very slow loading<br>
> up the SessionConfiguration due to all of the loading that happens in<br>
> ChainedProperties.<br>
> Thanks,<br>
> Dave<br>
><br>
> On 10 August 2010 13:53, Pavel Tavoda <<a href="mailto:pavel.tavoda@gmail.com" target="_blank">pavel.tavoda@gmail.com</a>> wrote:<br>
>><br>
>> Interesting. Normally it should be fast. Try to change your patter and<br>
>> load binary compiled serialized package from disk. You can find it in<br>
>> documentation.<br>
>> Also consider using stateless session. Do you really need stateful<br>
>> session?<br>
>><br>
>> Pavel<br>
>><br>
>> 2010/8/9 David Conde <<a href="mailto:dconde@calomtech.com" target="_blank">dconde@calomtech.com</a>>:<br>
>> > Is it possible that this might be invoking the compiler when a session<br>
>> > is<br>
>> > created? I have all of the init code in the service start call and<br>
>> > stored as<br>
>> > members of the service for reuse but I must create a new knowledge<br>
>> > session<br>
>> > for each run.<br>
>> > Any ideas?<br>
>> > Thanks,<br>
>> > Dave<br>
>> ><br>
>> > ---------- Forwarded message ----------<br>
>> > From: David Conde <<a href="mailto:dconde@calomtech.com" target="_blank">dconde@calomtech.com</a>><br>
>> > Date: 9 August 2010 11:17<br>
>> > Subject: Re: [rules-users] CPU Spike creating a StatefulKnowledgeSession<br>
>> > using OSGi<br>
>> > To: Rules Users List <<a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a>><br>
>> ><br>
>> ><br>
>> > The line that it spikes on is StatefulKnowledgeSession ksession =<br>
>> > kbase.newStatefulKnowledgeSession();.<br>
>> > Cheers,<br>
>> > Dave<br>
>> ><br>
>> > On 9 August 2010 11:09, Pavel Tavoda <<a href="mailto:pavel.tavoda@gmail.com" target="_blank">pavel.tavoda@gmail.com</a>> wrote:<br>
>> >><br>
>> >> Is it session creation or rule compilation?<br>
>> >><br>
>> >> Pavel<br>
>> >><br>
>> >> 2010/8/9 David Conde <<a href="mailto:dconde@calomtech.com" target="_blank">dconde@calomtech.com</a>>:<br>
>> >> > Good Morning,<br>
>> >> > I now have drools running on the Spring DM-Server but I am seeing a<br>
>> >> > CPU<br>
>> >> > spike when creating a StatefulKnowledgeSession. I've tested this<br>
>> >> > outside<br>
>> >> > of<br>
>> >> > an OSGi environment and I don't see the spike. Does anyone know any<br>
>> >> > settings<br>
>> >> > that I can change that might make this go away?<br>
>> >> > Thanks,<br>
>> >> > Dave<br>
>> >> ><br>
>> >> > --<br>
>> >> > David Conde<br>
>> >> > CTO Calom Technologies<br>
>> >> ><br>
>> >> ><br>
>> >> > _______________________________________________<br>
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>> >> > <a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a><br>
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>> >> ><br>
>> >> ><br>
>> >><br>
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>> ><br>
>> ><br>
>> ><br>
>> ><br>
>> ><br>
>> ><br>
>> ><br>
>> ><br>
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</div></div></blockquote></div><br><br clear="all"><br></div></div>-- <br><div class="im"><br></div></blockquote></div>
</div></div>