X2Go Bug report logs - #1328
x2gobroker-daemon does not work with tornado >=5.0

Package: x2gobroker; Maintainer for x2gobroker is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2gobroker is src:x2gobroker.

Reported by: "Rogalla, Niels [IT / Ev. Stiftung Augusta]" <n.rogalla@augusta-bochum.de>

Date: Mon, 24 Sep 2018 11:40:02 UTC

Severity: normal

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From: "Rogalla, Niels [IT / Ev. Stiftung Augusta]"
	<n.rogalla@augusta-bochum.de>
To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>
Subject: x2gobroker-daemon does not work with tornado >=5.0
Thread-Topic: x2gobroker-daemon does not work with tornado >=5.0
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Date: Mon, 24 Sep 2018 11:26:31 +0000
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Package: x2gobroker

Version: 0.0.3.4 (0x2go1+git20180206.1037+8)



When using python2-tornado >= 5.0 with the latest x2gobroker the x2gobroker-daemon does not start and following error message is shown in the log files:



Traceback (most recent call last):
  File "/usr/bin/x2gobroker-daemon", line 306, in <module>
    launch_ioloop()
  File "/usr/bin/x2gobroker-daemon", line 281, in launch_ioloop
    tornado.ioloop.IOLoop.instance().start()
  File "/usr/lib/python2.7/site-packages/tornado/ioloop.py", line 939, in start
    raise RuntimeError("Cannot share PollIOLoops across processes")
RuntimeError: Cannot share PollIOLoops across processes



This issue was tested against tornado versions 5.0.2, 5.1.0 and 5.1.1 and this error always occurs. The last working version of tornado is 4.5.3.




Kind regards,
Niels

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