You forgot to mention your Jenkins version. Killing processes was broken on 
Linux from 1.553-1.574.

On 28.08.2014, at 11:48, [email protected] wrote:

> We have a regressions server, running regressions of different applications, 
> using Jenkins. 
> 
> Some of these applications, tend to misbehave during the regression run, and 
> the build needs to be aborted. The runtimes of these applications are a mix 
> of JVM and native code, interfaced via JNI, and also httpd instances. 
> 
> Now, in our setup, we have the build timeout plugin configured. Typically 
> this is set as follows (with time out action being Abort the build on some 
> jobs and Fail the build on some jobs).
> 
> 
> 
> Now, what we see is that when a build fails, the JVMs and servers and httpd 
> instances corresponding to the build are still up. This keeps happening for a 
> series of jobs, the OS runs out of memory and this crashes the machine. 
> 
> We have confirmed these process have JENKINS_SERVER_COOKIE environment 
> variable set, so jenkins should in principle be able to clean them up. 
> 
> Looking at the documentation for build timeout plugin 
> (https://wiki.jenkins-ci.org/display/JENKINS/Build-timeout+Plugin) I see
> 
> Because Java only allows threads to be interrupted at a set of fixed 
> locations, depending on how a build hangs, the abort operation might not take 
> effect. For example,
>       * if Jenkins is waiting for child processes to complete, it can abort 
> right away.
>       * if Jenkins is stuck in an infinite loop, it can never be aborted.
>       * if Jenkins is doing a network or file I/O within the Java VM (such as 
> lengthy file copy or SVN update), it cannot be aborted.
> So if you think the build time out isn't taking effect, our default 
> assumption is that the build is hanging at the place that cannot be 
> interrupted. If you suspect otherwise, please obtain the thread dump and 
> report it.
> 
> 
> So am planning to collect the thread dump for the next set of runs and 
> understand the issue better. 
> 
> Also I was thinking of enabling more logs for the build timeout plugin. 
> Looking at the configure logging help page, 
> https://wiki.jenkins-ci.org/display/JENKINS/Logging, looks like I need the 
> name of the logger to configure for detailed logging. 
> 
> 
> 
> Can someone help me with the name of the logger to configure, please? 
> 
> Also any other pointers to debug the issue at hand would be more than welcome 
> ...
> 
> thanks and regards,
> pankaj
> 
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