Out of memory : Permgen Issue

[shamik]

Hi,

  I'm running into a java out of memory perm gen issue with my application. I've a SOAP endpoint which gets steady stream of request through out. I'm using the embedded jetty server with the connector Acceptors = 24 to restrict the concurrent request processing. The jetty threadpool is defined with 10 min and 100 max threads.

Fuse gets started with 12GB memory  --> -Xmx12288m. After running for couple days, the service gets chocked up and throws "java.lang.OutOfMemoryError: PermGen space" exception. During this period and subsequent time, the memory usage is 100% with high CPU usage as well. I'm yet to do a detailed profiling to see where the bottleneck is.

But as a best practice, are there any standard tuning options available at configuration level ? I've noticed that a chunk of resource is being is being utilized by ActiveMQ and Quartz. Are they being used by fuse/servicemix internally , if not can I safely turn them off since I'm not using them in my app ?

Any pointer will be appreciated.

- Thanks

[ffang]

Hi,

Just a quick notes, for the "PermGen space" exception, you should use -XX:MaxPermSize=the_size_you_wantm

Freeman

[shamik]

Freeman, I'm already using the permgen option with 500 mb allocated. Maybe, I need to bump up the number a little more.

Meanwhile, can you let me know if ActiveMQ and Quartz services are required ?

[ffang]

Hi,

I assume you're using FUSE ESB 4.x.

ActiveMQ feature is used internally by jbi-cluster and servicemix-wsn2005.

Anyway, if you don't use those at all, you can edit $FUSE_ESB/etc/org.apache.karaf.features.cfg and remove activemq-broker, jbi-cluster, servicemix-wsn2005 from featuresBoot.

You can also remove servicemix-quartz from it.

You actually can pick up the necessary default installed feature yourself by editing that file.

Freeman

[shamik]

I removed activemq-broker, jbi-cluster, servicemix-wsn2005 and servicemix-quartz from the org.apache.karaf.features.cfg featuresBoot, but still able to see ActiveMQ Transport, Connection threads as well DefaultQuartzScheduler threads. Is there any other place I need to make the modifications? I'm using fuse 4.4

[ffang]

Hi,

Also remove camel-activemq and servicemix-jms, as both dependency on activemq feature.

Freeman

[shamik]

Unfortunately, ActiveMQ and Quartz still shows up. This how the entry looks like :

featuresBoot=karaf-framework,config,camel,camel-nmr,camel-cxf,war,servicemix-cxf-bc,servicemix-file,servicemix-ftp,servicemix-http,servicemix-mail,servicemix-smpp,servicemix-snmp,servicemix-vfs,servicemix-bean,servicemix-camel,servicemix-cxf-se,servicemix-drools,servicemix-eip,servicemix-osworkflow,servicemix-scripting,servicemix-validation,servicemix-saxon

Probably,some other feature has an internal reference ?

[davsclaus]

Most of the servicemix-xxx is JBI components. If you dont need that, then I suggest to try remove those features as well.

For example I could imaging the osworkflow may depend and use Quartz as its a workflow engine

[shamik]

Thanks Freeman, I'll try selectively remove them and see how it goes.

[ffang]

Hi,

That's Claus who answer you just now, I guess you wanna thank him.

Freeman

[shamik]

My bad, thanks Claus