RFR (XXS) 8069068: VM warning: WaitForMultipleObjects timed out (0) ...

[Daniel D. Daugherty]

On 5/20/15 7:57 AM, Ivan Gerasimov wrote:
>
>
> On 20.05.2015 10:04, David Holmes wrote:
>> Hi Ivan,
>>
>> On 20/05/2015 9:54 AM, Ivan Gerasimov wrote:
>>> Hello!
>>>
>>> Since the beginning of the year a warning about an expired timeout has
>>> been seen a few times.
>>> It is most likely to observe this under a heavy load, when many threads
>>> are exiting.
>>>
>>> The propose is to increase the timeout.
>>> The rationale is that if an application needs more time for the threads
>>> to exit, let's give it that time.
>>
>> Rather than just bumping the timeout a little I would suggest bumping 
>> it a lot - make it a few minutes. If that fails then it suggests we 
>> have a real problem not just a slow or loaded machine. Otherwise if 
>> we just keep bumping the timeout it serves no purpose.
>>
>
> Alright. Then let's make it 5 minutes for both product and debug bits:
>
> WEBREV: http://cr.openjdk.java.net/~igerasim/8069068/01/webrev/

Thumbs up. If I remember correctly, we'll only hit the
5 minute timeout if we end up with the bottleneck where
too many threads are queued up to leave... and none of
the threads that are leaving make progress...

Dan


>
> Sincerely yours,
> Ivn
>
>
>> Cheers,
>> David
>>
>>
>>> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8069068
>>> WEBREV: http://cr.openjdk.java.net/~igerasim/8069068/00/webrev/
>>>
>>> Sincerely yours,
>>> Ivan
>>
>>
>