[jboss-jira] [JBoss JIRA] Created: (JBMESSAGING-1693) Unable to consume more than 777, 000 messages

[Bijith Kumar (JIRA)]

Unable to consume more than  777,000 messages
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                 Key: JBMESSAGING-1693
                 URL: https://jira.jboss.org/jira/browse/JBMESSAGING-1693
             Project: JBoss Messaging
          Issue Type: Bug
    Affects Versions: 2.0.0
         Environment: Windows Vista, 32 bit, 2GB RAM
            Reporter: Bijith Kumar
            Assignee: Tim Fox
            Priority: Critical


Using messaging-2.0.0.BETA3 stand alone non-clustered
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I am trying to consume 1 Million messages from a Queue using 10 concurrent consumers (Threads) . Consumption hangs after consuming 777,000 messages.  i.e. even though I am able to see the messages from JConsole, Consumers does not read any. Below given are the memory settings for the Queue
 <global-page-size>10485760</global-page-size>
<paging-max-global-size-bytes>104857600</paging-max-global-size-bytes> 

Also, I have added the following JVM parameters in run.bat script to enable JMX. Rest of the configuration files are untouched (i.e. they are with default settings)
-Dcom.sun.management.jmxremote.port=3000 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false

Please find the attached java files. Test instructions are given below
1) Execute "TestSender.java" and let it complete. This will send 1 million messages to Queue "myQQ".
2) Observe the Queue "myQQ" from JConsole. It can be seen that there are 23745 messages in Queue (means rest are paged).
3) Execute "TestCunsumer.java". This will spawn 10 consumer threads to read from "myQQ"
4) Observe from JConsole that after the messages are getting consumed. i.e. values of MessageCount and MessageAdded attributes keeps on changing
5) Observe that after a while consumption hangs (i.e.values of MessageCount and MessageAdded attributes does not change). I calculated the number of messages consumed by substracting MessageCount  from messagedAdded. Following are the values I got for last three runs
Messages Consumed = messagedAdded -  MessageCount  
 a) 800246 - 23246 = 777000
 b) 799037 - 22037 = 777000
 c)  799037 - 22037 = 777000

It seems the number of messages consumed (777000 in above case) is driven by message size.  Because, when I tried another message, the consumption hanged after 780,000 messages.

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