I just had this behaviour when the forked process (guessing that you are
using a forked container) got stuck loading a dependency (network, proxy
issue).
Please send in a trace log and dump.



On Tue, Oct 18, 2016 at 9:59 AM, Guillaume Nodet <gno...@apache.org> wrote:

> Would you be able to get a thread dump of both JVMs when they hang ?
> That may be able to give a pointer ...
>
> 2016-10-18 2:43 GMT+02:00 Benson Margulies <ben...@basistech.com>:
>
>> On Mon, Oct 17, 2016 at 7:58 PM, Niclas Hedhman <nic...@hedhman.org>
>> wrote:
>> > It doesn't even timeout after 10, 20, 60 minutes?
>>
>> Nope. And it's not failing to start: in the exam plugin case, it
>> starts, the tests run that talk to the Karaf instance, and then it
>> hangs in stop. And even if I use the Linux kill command to kill the
>> karaf process, the exam-maven-plugin remains stuck waiting for
>> something on the shutdown side.
>>
>>
>>
>> >
>> > On Tue, Oct 18, 2016 at 3:39 AM, Benson Margulies <ben...@basistech.com
>> >
>> > wrote:
>> >>
>> >> Using pax-exam 4.9.1, we suffer from unpredictable hangs on shutdown.
>> >> We've seen this with the exam-maven-plugin and when using
>> >>
>> >> @ClassRule
>> >> public static PaxExamServer exam = new PaxExamServer();
>> >>
>> >>
>> >> to launch karaf 4.0.6. Most of the time, everything works as expected,
>> but
>> >> when it goes wrong, it just gets stuck, sitting there. We're on the
>> verge of
>> >> implementing a thread waiting for a connection that will just stop the
>> OSGi
>> >> framework forcibly. That's pretty ugly. Can anyone suggest a debugging
>> >> strategy? The non-reproducibility of this is, of course, a barrier.
>> >>
>> >> --
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>> >
>> >
>> >
>> > --
>> > Niclas Hedhman, Software Developer
>> > http://zest.apache.org - New Energy for Java
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>
>
> --
> ------------------------
> Guillaume Nodet
> ------------------------
> Red Hat, Open Source Integration
>
> Email: gno...@redhat.com
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> Blog: http://gnodet.blogspot.com/
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