RFR [8034262] Test java/lang/ProcessBuilder/CloseRace.java fails

Ivan Gerasimov ivan.gerasimov at oracle.com
Wed Mar 12 08:42:10 UTC 2014

Thank you David

On 12.03.2014 8:46, David Holmes wrote:
> On 11/03/2014 10:24 PM, Ivan Gerasimov wrote:
>> Hello everybody!
>> The test java/lang/ProcessBuilder/CloseRace.java was reported to
>> intermittently fail.
>> The test timed out, which should mean that at least one of the child
>> threads was never interrupted.
>> I couldn't reproduce the failure, but I suspect it might happen due to
>> call to interrupt() before the child thread became alive (I'm not really
>> sure if it's possible to be non-alive after call to start()).
> It isn't. There's no reason the interrupt() would not be sent. More 
> likely problem is that the thread gets stuck in those busy-loops for 
> some reason; or the process.waitFor does not respond to the interrupt 
> (not sure how that is handled).
Yes, you are right!
The problem was with the loop in the child thread - please see my 
response to Martin's message above.

> Need a stack-dump of a hung process.

Here's the updated webrev with the checks for the thread to be 
interrupted in the loops and stack dumping in the case of a failure:


Sincerely yours,

> David
> -----
>> The fix is to explicitly synchronize children with the parent.
>> Would you please help review the fix?
>> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8034262
>> WEBREV: http://cr.openjdk.java.net/~igerasim/8034262/0/webrev/
>> Sincerely yours,
>> Ivan

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