Re: [tycho-user] How to perform a heap dump before tests are killed afte

[<Bernd.Vogt@xxxxxxxxxxxx>]

> we *could* catch CommandLineTimeOutException and react on that.

Until then, the process has been destroyed :( See finnaly block of CommandLineUtils#executeCommandLineAsCallable(...).

The only proper solution I see is to expand CommandLineUtils with an optional callback object...

Bernd

P.S.: Thinking about to start a timer on test setup which produces the stack dump after a specified period of time.

> -----Ursprüngliche Nachricht-----
> Von: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-bounces@xxxxxxxxxxx] Im Auftrag von Sievers,
> Jan
> Gesendet: Dienstag, 19. Februar 2013 14:00
> An: Tycho user list
> Betreff: Re: [tycho-user] How to perform a heap dump before tests are killed after
> ${surefire.timeout}?
> 
> we *could* catch CommandLineTimeOutException and react on that.
> 
> Jan
> 
> From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-bounces@xxxxxxxxxxx] On Behalf Of Stéphane
> Bouchet
> Sent: Dienstag, 19. Februar 2013 12:20
> To: Tycho user list
> Subject: Re: [tycho-user] How to perform a heap dump before tests are killed after
> ${surefire.timeout}?
> 
> The incrimined source code is the maven surefire plugin :
> http://grepcode.com/file/repo1.maven.org/maven2/org.codehaus.plexus/plexus-
> utils/2.1/org/codehaus/plexus/util/cli/CommandLineUtils.java#164
> 
> When the timeout is reached, it just throw an interrupted exception, without any info. You should drop
> a request to maven surefire mainteners, i don't think tycho can do anything for this.
> 
> 
> Cheers,
> 
> 2013/2/19 <Bernd.Vogt@xxxxxxxxxxxx>
> Oops, of course ... I need a thread dump not a heap dump...
> 
> Unfortunately, the deadlocks are not reproducible, which makes it almost impossible to debug it
> manually. So, the ability to launch jstack before the test jvm is killed would be very helpfull ;)
> 
> Bernd
> 
> > -----Ursprüngliche Nachricht-----
> > Von: tycho-user-bounces@xxxxxxxxxxx
> > [mailto:tycho-user-bounces@xxxxxxxxxxx] Im Auftrag von Sievers, Jan
> > Gesendet: Dienstag, 19. Februar 2013 11:09
> > An: Tycho user list
> > Betreff: Re: [tycho-user] How to perform a heap dump before tests are
> > killed after ${surefire.timeout}?
> >
> > not sure this is useful enough for a new tycho feature
> >
> > BTW don't know if a heapdump will help you in case of deadlocks.
> >
> > if the problems are reproducible, you are probably better off either
> > manually debugging the test or using jstack to get a full VM stacktrace.
> >
> > Jan
> >
> > -----Original Message-----
> > From: tycho-user-bounces@xxxxxxxxxxx
> > [mailto:tycho-user-bounces@xxxxxxxxxxx] On Behalf Of
> > Bernd.Vogt@xxxxxxxxxxxx
> > Sent: Dienstag, 19. Februar 2013 11:04
> > To: tycho-user@xxxxxxxxxxx
> > Subject: Re: [tycho-user] How to perform a heap dump before tests are
> > killed after ${surefire.timeout}?
> >
> > Thanks for your reply.
> >
> > Unfortunately, we don't have OOM errors but deadlocks! So
> > -XX:+HeapDumpOnOutOfMemoryError won't take effect here.
> >
> > In case of a deadlock, the test jvm is killed from outside by Tychos
> > TestMojo after a specified period of time (${surefire.timeout}). Now
> > we need the ability to get the JVM to produce a heap dump befor it's killed by Tycho.
> >
> > To do this, it would be nice to be able to specify a command line
> > which is executed before the test process is killed. So, we could use
> > jmap to perform the heap dump. If this is an appropriate feature for Tycho? I'll open a bugzilla for
> it. I'm also happy about any other solution...
> >
> > Thanks,
> > Bernd
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: tycho-user-bounces@xxxxxxxxxxx
> > > [mailto:tycho-user-bounces@xxxxxxxxxxx] Im Auftrag von Sievers, Jan
> > > Gesendet: Dienstag, 19. Februar 2013 10:16
> > > An: Tycho user list
> > > Betreff: Re: [tycho-user] How to perform a heap dump before tests
> > > are killed after ${surefire.timeout}?
> > >
> > > JVM option
> > >
> > > -XX:+HeapDumpOnOutOfMemoryError
> > >
> > > should do it [1]
> > >
> > > Jan
> > >
> > > [1]
> > > http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140
> > > 10
> > > 2.html
> > >
> > > -----Original Message-----
> > > From: tycho-user-bounces@xxxxxxxxxxx
> > > [mailto:tycho-user-bounces@xxxxxxxxxxx] On Behalf Of
> > > Bernd.Vogt@xxxxxxxxxxxx
> > > Sent: Dienstag, 19. Februar 2013 10:11
> > > To: tycho-user@xxxxxxxxxxx
> > > Subject: [tycho-user] How to perform a heap dump before tests are killed after
> ${surefire.timeout}?
> > >
> > > Hello,
> > >
> > > we have problems with several non-deterministic unit tests. From
> > > time to time some tests remain stuck and are killed after
> > > ${surefire.timeout}. We believe that the cause is a classical
> > > deadlock within our code. But to analyze the actual problem, we need
> > > a heap dump from the test jvm before it
> > gets killed by Tycho.
> > >
> > > To do this, it would be nice to be able to specified a command line
> > > which is executed before the test process is killed. So, we could
> > > use jmap to perform the heap dump :)
> > >
> > > Is this an appropriate feature for Tycho? If yes I'll open a bugzilla for it.
> > >
> > > Is there any other appropriate solution to perform a heap dump
> > > before the test jvm is killed from outside?
> > >
> > > Best regards
> > >
> > > Bernd Vogt
> > > _______________________________________________
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> > > tycho-user@xxxxxxxxxxx
> > > https://dev.eclipse.org/mailman/listinfo/tycho-user
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