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From "Igal @" <>
Subject Re: Tomcat Not Responding (was: Tomcat 8.5.12 Not Responding)
Date Thu, 23 Mar 2017 05:07:44 GMT
Hi Mark,

On 3/22/2017 1:00 PM, Mark Thomas wrote:
> On 22/03/17 16:20, Igal @ wrote:
>> Looks like all the threads are waiting on the same lock?
> Agreed. But I don't see anything holding that lock. That looks like a
> JVM bug to me.

Thank you for replying.  I managed to "do" it again.  This time on 
Tomcat 8.5.11 so I modified the subject line slightly.  But this time I 
took both a thread dump (attached) and a heap dump.

I should mention that my code utilizes JSR-356 WebSockets, I'm not sure 
if that's related, but it seems to be a factor in reproducing the issue.

I will try to create a reduced test case.

I am hoping that the screenshots below, showing references to and from 
the lock object at 0x00000006c0dbc1b8, can give you some more 
information that may help to diagnose this issue, or at least give some 
ideas about what to look for next:

Thanks again,


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