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http://issues.apache.org/jira/browse/DIRMINA-202?page=comments#action_12373355 
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John K Peterson commented on DIRMINA-202:
-----------------------------------------

I apologize.  I'm not very familiar with NIO yet and I only read the summary of 
the selector.wakeup function.  You're correct that it sounds like it could be a 
problem with Classpath.  (I've had several other issues with it running 
ApacheDS that I've reported to them already.)  I'll do a separate test with 
selector and wakeup to see if Classpath is the problem.

> Race condition in SocketAcceptorDelegate.unbind
> -----------------------------------------------
>
>          Key: DIRMINA-202
>          URL: http://issues.apache.org/jira/browse/DIRMINA-202
>      Project: Directory MINA
>         Type: Bug

>     Reporter: John K Peterson

>
> On my system (Linux 2.4.22/JamVM 1.4.2/Classpath 0.90), ApacheDS gets stuck 
> in SocketAcceptorDelegate.unbind.
> SocketAcceptorDelegate.unbind does the following:
> 1) creates a cancellation request
> 2) starts up a worker thread
> 3) puts the cancellation request on the cancelQueue
> 4) wakes up the worker thread's selector
> 5) waits for the cancellation request to be done
> The problem is that 4) assumes that 2) has gotten the worker thread to point 
> where it has called selector.select().   However, there's no guarantee that 
> the worker thread has gotten that far, in which case the wakeup occurs before 
> the select and then the select hangs.

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