While the thread is not blocked, it still looks suspiciously like
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7130796

On 28.10.2014, at 20:57, Isaac Cohen <iss...@gmail.com> wrote:

> Attached is a thread dump taken when jenkins was unresponsive. I couldnt find 
> anything suspicious, but maybe I missed something?
> 
> Thanks,
> Isaac
> 
> On Wednesday, October 22, 2014 7:10:43 AM UTC-4, Rupali wrote:
> Hi James,
> 
> Thanks for your reply.
> We are using Windows server.
> I will try jstack as you suggested and will post my findings.
> 
> Thanks,
> Rupali
> 
> On Tuesday, October 21, 2014 4:05:31 PM UTC+5:30, James Nord (jnord) wrote:
> Are you on Linux and are you using the embedded container?
> 
> If so have you upped the number of file descriptors available from Jenkins – 
> I have see in the past that is was not uncommon for the HTTP receiving thread 
> to die due to not being able to handle a connection correctly.
> 
>  
> Otherwise – jstack will likely be your friend – will show any deadlocks and 
> show what threads are running.
> 
>  
> /james
> 
>  
> From: jenkins...@googlegroups.com [mailto:jenkins...@googlegroups.com] On 
> Behalf Of Rupali Chorghe
> Sent: 21 October 2014 04:11
> To: jenkins...@googlegroups.com
> Subject: RE: Jenkins become unresponsive
> 
>  
> Hi Terrence,
> 
> Thanks for reply.
> Problem we are facing is when Jenkins becomes unresponsive, everything that 
> needs Jenkins URL, becomes inaccessible. So we decided to use Jconsole. But 
> we didn't find abnormalities in CPU and memory usage when monitored using 
> jconsole.
> 
> Regards,
> Rupali
> 
> On 21-Oct-2014 2:49 am, "Dunnigan, Terrence J" <terrence....@boeing.com> 
> wrote:
> 
> Are you using the Jenkins Monitoring plugin?
> 
>  
> https://wiki.jenkins-ci.org/display/JENKINS/Monitoring
> 
>  
> It might help to provide some context and additional information when Jenkins 
> is not responding.
> 
>  
> Terry
> 
>  
> From: jenkins...@googlegroups.com [mailto:jenkins...@googlegroups.com] On 
> Behalf Of Rupali
> Sent: Monday, October 20, 2014 6:46 AM
> To: jenkins...@googlegroups.com
> Subject: Jenkins become unresponsive
> 
>  
> Hi,
> 
> We are facing one weird issue.
> Intermittently, our Jenkins URL becomes inaccessible. Only restarting Jenkins 
> service resolves the issue.
> 
> We are using Jenkins 1.565. We tried to analyses memory and CPU usage when 
> such state appears. But CPU usage looked very low around 2% and memory usage 
> by Jenkins Java process also was around 1.7 GB which is the case usually. We 
> have Master-Slave setup containing 8 slave machines of which 2 slaves have 
> dedicated jobs to run.
> 
> Can you advise on how to analyze this issue to find out the root cause of 
> Jenkins becoming inaccessible?
> 
> Regards,
> Rupali
> 
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> <thread_dump_24OCT2014.txt>

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