Also, the error seems to be some resource limit:

ERROR: test_correct_timeout_exception_msg (test.test_concurrent_futures.ThreadPoolAsCompletedTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_concurrent_futures.py", line 122, in setUp
self._prime_executor()
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_concurrent_futures.py", line 141, in _prime_executor
futures = [self.executor.submit(time.sleep, 0.1)
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_concurrent_futures.py", line 141, in <listcomp>
futures = [self.executor.submit(time.sleep, 0.1)
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/concurrent/futures/thread.py", line 160, in submit
self._adjust_thread_count()
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/concurrent/futures/thread.py", line 181, in _adjust_thread_count
t.start()
File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/threading.py", line 847, in start
_start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread


On Sun, 4 Nov 2018, 13:56 Pablo Galindo Salgado, <pablogsal@gmail.com> wrote:
This particular platform is not very easy as we cannot get access to the worker :(

I have triggered a forced build to check if this is transient or not.


On Sun, 4 Nov 2018, 13:09 Stephane Wirtel, <stephane@wirtel.be> wrote:
It's not the first issue on this worker. maybe we should check the
worker and fix the issue.


On 11/03, buildbot@python.org wrote:
>The Buildbot has detected a failed build on builder s390x Debian 3.x while building python/cpython.
>Full details are available at:
>    https://buildbot.python.org/all/#builders/13/builds/1869
>
>Buildbot URL: https://buildbot.python.org/all/
>
>Worker for this Build: edelsohn-debian-z
>
>Build Reason: <unknown>
>Blamelist: Stéphane Wirtel <stephane@wirtel.be>, İsmail Arılık <arilik.ismail@gmail.com>
>
>BUILD FAILED: failed test (failure)
>
>Sincerely,
> -The Buildbot
>_______________________________________________
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--
Stéphane Wirtel - https://wirtel.be - @matrixise
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