Timer.cancel() leaves timer thread live and running

[zboris]

I've seen similar post somewhere in this forum, but no answer was given.

Please let me clarify. During life cycle of Jboss (time between restarts) I have to create at least 10000 timers within my application. 99% (at least) of this timers are getting cancelled, so simultaneuosly I have around only 20 of them running.

The problem is that after creating say 3000 timers - JBoss reports: java.lang.OutOfMemoryError: unable to create new native thread.

I have done similar investigation as this dude in post: http://www.jboss.org/index.html?module=bb&op=viewtopic&t=63046

and it seems to be right that jboss leaves threads running after they have been cancelled. Any clarification on this?

I am running Jboss 4.0.1sp1 under SUSE linux enterprise 3.1 SDK 1.4.2_02.

Thanks, Josif Amar-din

[zboris]

To make sure that spawning of a new Timers and then cancelling them do not result in thread's pool growing in its size mark the cancelTimer method's transaction in ejb-jar.xml as NotSupported. i.e.:

<container-transaction>

<ejb-name>MyEnterpriseBean</ejb-name>
<method-name>*</method-name>

<trans-attribute>Required</trans-attribute>
</container-transaction>

<container-transaction>

<ejb-name>MyEnterpriseBean</ejb-name>
<method-name>cancelTimer</method-name>

<trans-attribute>NotSupported</trans-attribute>
</container-transaction>