[X2Go-Dev] Bug#1328: x2gobroker-daemon does not work with tornado >=5.0

[Rogalla, Niels [IT / Ev. Stiftung Augusta]]

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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[Mike Gabriel]

Hi Niels,

On Mo 24 Sep 2018 13:26:31 CEST, Rogalla, Niels [IT / Ev. Stiftung

Post by Rogalla, Niels [IT / Ev. Stiftung Augusta]
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
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

Please let us get this fixed with the version of x2gobroker you find
in the nightly builds.

It is very likely, that you will encounter the same issue when using
x2gobroker from the X2Go nightly builds, but that version should be
the one to use for testing setups, as it will be release soon.

And before the release, we should get your problem solved.

Thanks+Greets,
Mike