[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Weird deadlock I had today...

[clebert.suconic@jboss.com]

To replicate this:

I - Open org.jboss.messaging.tests.performance.paging.MeasurePagingMultiThreadTest

II - Change testPagingMultipleSenders to:

  |    public void testPagingMultipleSenders() throws Throwable
  |    {
  | 
  |       final int NUMBER_OF_THREADS = 18;
  |       final int NUMBER_OF_MESSAGES = 100;
  |       final int SIZE_OF_MESSAGE = 1024;
  | 
  |       Configuration config = createDefaultConfig();
  | 
  |       HashMap<String, QueueSettings> settings = new HashMap<String, QueueSettings>();
  | 
  |       config.setPagingMaxGlobalSizeBytes(20 * 1024);
  |       config.setJournalSyncTransactional(true);
  | 

III - run the test inside Eclipse.


Wait some time...., and call the kill -3 on the process. (I aways do killall -3 java)


My disk is somewhat slow at sync, maybe because it is really syncing and not using any caching. If you don't get the deadlock, use a higher number of Messages as your disk may be faster.

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