1 Reply Latest reply on Apr 27, 2005 1:14 AM by zboris

    Timer.cancel() leaves timer thread live and running

    zboris
    zboris Apr 25, 2005 7:23 PM

      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

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        • 1. Re: Timer.cancel() leaves timer thread live and running
          zboris
          zboris Apr 27, 2005 1:14 AM (in response to 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>

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