Yes, it is like Jesse said. The CPS VM thread automatically interrupts any 
synchronous code/step that takes more than 5 minutes to execute. Once you fix 
the step so it executes asynchronously (or redesign it so the actual work is 
done by the `sh` step) then the CPS VM thread will stop interrupting it and the 
timeout set by the `timeout` step will take effect.

> On Jul 23, 2020, at 12:42, Nikhil Bhoski <[email protected]> wrote:
> 
> Thanks Alot Davin for such detailed explanation. I will check sh and bat and 
> try understand its implementation .  However i was curious to know if this is 
> the reason that possibly causing issue of not abiding timeout block .
> 
> Thanks & Regards
> Nikhil
> 
> On Thursday, 23 July 2020 21:59:52 UTC+5:30, Devin Nusbaum wrote:
> Although you tried to make your step asynchronous, it is not actually 
> asynchronous. `execMatlabCommand` runs during your StepExecution’s `start` 
> method and internally calls `Process.join` to wait for the process to 
> complete, so your `start` method doesn’t return until the process completed. 
> Another indication that your step is not asynchronous is that you call 
> `getContext().onSuccess(true);` before you `return false` from the step, 
> meaning that your step has already completed. 
> 
> You need to change things so that your step starts the command and then sets 
> up a background process to check its status periodically to know if it is 
> completed. Doing this for external processes is somewhat complex, but you 
> could look at the `sh` and `bat` steps for an example. 
> 
> Stepping back a little bit, I would try to investigate to see if you could 
> implement this plugin’s functionality in a different way (maybe a 
> block-scoped step that sets up environment variables, etc. as needed) and 
> just have users use the standard `sh` and `bat` steps to launch the Matlab 
> command so that you do not have to reimplement that functionality. 
> 
> 
> > On Jul 23, 2020, at 12:18, Nikhil Bhoski <[email protected] <>> wrote: 
> > 
> > Hi Gavin , 
> > 
> > The stop is implemented as per the doc which Jesse shared. it reads like 
> > below 
> >  But i get your point now and i guess i should kill the process in stop. 
> > any ideas on how could i get access to the process in stop () ? 
> > 
> > You should also implement stop to terminate the step. It could simply read 
> > 
> > getContext().onFailure(cause); 
> > 
> > On Thursday, 23 July 2020 21:22:12 UTC+5:30, Gavin Mogan wrote: 
> > Its been a long time since i wrote plugins using these APIs but how come 
> > your on stop isn't doing anything? Shouldn't it kill the process? 
> > 
> > On Thu., Jul. 23, 2020, 8:48 a.m. Nikhil Bhoski, <[email protected] <>> 
> > wrote: 
> > Thanks Jesse, 
> > 
> >  I had referred the same doc and i guess i am following as per 
> > recommendation. Here is my step execution class 
> > 
> > https://github.com/jenkinsci/matlab-plugin/blob/master/src/main/java/com/mathworks/ci/MatlabCommandStepExecution.java
> >  
> > <https://github.com/jenkinsci/matlab-plugin/blob/master/src/main/java/com/mathworks/ci/MatlabCommandStepExecution.java>
> >  
> > 
> > Which will be called in 
> > 
> > https://github.com/jenkinsci/matlab-plugin/blob/master/src/main/java/com/mathworks/ci/RunMatlabCommandStep.java
> >  
> > <https://github.com/jenkinsci/matlab-plugin/blob/master/src/main/java/com/mathworks/ci/RunMatlabCommandStep.java>
> >  
> > 
> > Thanks & Regards 
> > Nikhil 
> > 
> > On Thursday, 23 July 2020 19:09:30 UTC+5:30, Jesse Glick wrote: 
> > On Thu, Jul 23, 2020 at 3:47 AM Nikhil Bhoski <[email protected] <>> 
> > wrote: 
> > > when i use this step with options block with 6 minutes pause  as shown 
> > > below.my step does not seem to have any effect of this overriden timeout 
> > > value . It always gets terminated after 5 minutes 
> > 
> > You are most likely blocking the whole CPS VM thread, which is illegal. 
> > See: 
> > 
> > https://github.com/jenkinsci/workflow-step-api-plugin/blob/master/README.md#creating-an-asynchronous-step
> >  
> > <https://github.com/jenkinsci/workflow-step-api-plugin/blob/master/README.md#creating-an-asynchronous-step>
> >  
> > 
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