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From "Jim Gomes (JIRA)" <jira+amq...@apache.org>
Subject [jira] [Created] (AMQNET-330) MutexTransport creates bottleneck for multi-threaded applications
Date Tue, 14 Jun 2011 20:52:50 GMT
MutexTransport creates bottleneck for multi-threaded applications
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                 Key: AMQNET-330
                 URL: https://issues.apache.org/jira/browse/AMQNET-330
             Project: ActiveMQ .Net
          Issue Type: Bug
          Components: ActiveMQ, Stomp
    Affects Versions: 1.5.1
         Environment: Windows 7 64-bit, .NET 3.5 & 4.0.
            Reporter: Jim Gomes
            Assignee: Jim Gomes
             Fix For: 1.5.2, 1.6.0


The MutexTransport creates a massive bottleneck in a multi-threaded application that uses
timeouts for sending messages.  This scenario makes the assumption that the failover protocol
is being used to automatically reconnect to a broker that goes offline.  If multiple threads
are sending messages that have a send timeout and the broker is currently offline, then those
calls get queued up in serial instead of executing in parallel.  For example, if the send
timeout is set to 10 seconds and 50  threads are simultaneously sending a message, it will
take 500 seconds for all fifty threads to finally error out.  The programmer of the code would
expect the timeout to be 10 seconds maximum in order to have acceptable application performance.

The MutexTransport needs to honor and use the timeout value of the transport that it is protecting
and allow parallel waits.

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