RR, S: 7162400 Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand

[David Holmes]

On 22/08/2012 5:23 AM, Alan Bateman wrote:
> On 21/08/2012 20:05, Dmitry Samersoff wrote:
>> Hi Everybody,
>>
>> Please review small fix.
>>
>> http://cr.openjdk.java.net/~dsamersoff/7162400/webrev.02/
>>
>> -Dmitry
>>
> Can you explain the issue a bit further? Looking at the code I can see
> there may be an issue with asynchronous detach (my default, I didn't get
> that right in the original implementation) but I can't tell if this is
> what you are trying to address now.

I was going to make a similar request. Some context for the problem and 
solution makes reviewing a lot easier.

In this case as I understand it between checking the fd for the door 
call and making the door call, someone can call detach, and so we get 
EBADF. The detach is synchronized on this, so the fix moves the enqueue 
inside the sync block so that it has to complete before anyone can call 
detach.

David
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