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From "Eddie Fast (JIRA)" <jira+amq...@apache.org>
Subject [jira] [Commented] (AMQNET-338) TcpTransport.cs - Close() taking 30 seconds
Date Fri, 05 Aug 2011 17:41:27 GMT

    [ https://issues.apache.org/jira/browse/AMQNET-338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13080102#comment-13080102
] 

Eddie Fast commented on AMQNET-338:
-----------------------------------

We've been running the same C# library in our regular MS .NET desktop apps for years without
problems, so I suspect that you are right that it might be Mono specific.


> TcpTransport.cs - Close() taking 30 seconds
> -------------------------------------------
>
>                 Key: AMQNET-338
>                 URL: https://issues.apache.org/jira/browse/AMQNET-338
>             Project: ActiveMQ .Net
>          Issue Type: Bug
>          Components: NMS
>    Affects Versions: 1.5.1
>         Environment: Windows 7, .NET 2.0, Visual Studio 2008, Unity 3.4
>            Reporter: Eddie Fast
>            Assignee: Jim Gomes
>
> We've been noticing a random freeze on exit for 30 seconds.  The frequency is different
per machine, but it happens about 10-30% of the time, sometimes more.  We've traced it down
to TcpTransport.Close(), in this block:
> {noformat}
> if(null != readThread)
> {
> 	if(Thread.CurrentThread != readThread && readThread.IsAlive)
> 	{
> 		if(!readThread.Join((int) MAX_THREAD_WAIT.TotalMilliseconds))
> 		{
> 			readThread.Abort();
> 		}
> 	}
> 	readThread = null;
> }
> {noformat}
> We're running this in the Unity game engine, which run C# script in a Mono environment.
> I understand that reproducing this on your end would be difficult, but I'm reporting
this in the hopes that I can gain some insight why this is happening.
> - What thread is this code waiting for?
> - What would be some of the causes of the deadlock?
> No messages are being sent or received.  It's basically starting up and closing down.
> Our temporary workaround is to reduce this wait time from 30 seconds to 5 seconds, but
I'd like to eventually find a cause.
> Thanks

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