Failed after update to 0.33.5.1 on Ubuntu 16.04.5 LTS

[aleks-o]

Description

Failed to start after update to version 0.33.5.1 on Ubuntu 16.04.5 LTS

Steps to reproduce

Update to version 0.33.5.1
Service failed to start with the error:

-- Unit matrix-synapse.service has begun starting up.
Sep 25 05:05:08 matrix1 python[13262]: Traceback (most recent call last):
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
Sep 25 05:05:08 matrix1 python[13262]:     "__main__", fname, loader, pkg_name)
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
Sep 25 05:05:08 matrix1 python[13262]:     exec code in run_globals
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/synapse/app/homeserver.py", line 58, in <module>
Sep 25 05:05:08 matrix1 python[13262]:     from synapse.replication.http import REPLICATION_PREFIX, ReplicationRestResource
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/synapse/replication/http/__init__.py", line 17, in <module>
Sep 25 05:05:08 matrix1 python[13262]:     from synapse.replication.http import federation, membership, send_event
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/synapse/replication/http/federation.py", line 24, in <module>
Sep 25 05:05:08 matrix1 python[13262]:     from synapse.util.metrics import Measure
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/synapse/util/metrics.py", line 53, in <module>
Sep 25 05:05:08 matrix1 python[13262]:     sub_metrics=["real_time_max", "real_time_sum"],
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/synapse/metrics/__init__.py", line 121, in __init__
Sep 25 05:05:08 matrix1 python[13262]:     slots=True,
Sep 25 05:05:08 matrix1 python[13262]:   File "/usr/lib/python2.7/dist-packages/attr/_make.py", line 581, in make_class
Sep 25 05:05:08 matrix1 python[13262]:     return attributes(**attributes_arguments)(type(name, (object,), cl_dict))
Sep 25 05:05:08 matrix1 python[13262]: TypeError: attributes() got an unexpected keyword argument 'slots'
Sep 25 05:05:08 matrix1 systemd[1]: matrix-synapse.service: Control process exited, code=exited status=1
Sep 25 05:05:08 matrix1 systemd[1]: Failed to start Synapse Matrix homeserver.
-- Subject: Unit matrix-synapse.service has failed

Version information

• Homeserver: My own homeserver.

If not matrix.org:

• Version: 0.33.5.1
• Install method: package manager
• Platform: Ubuntu 16.04.5 LTS

[richvdh]

yup, looks like we're using features from attrs which arrived in 16.0.0 but xenial only has 15.2.0.

[richvdh]

@aleks-o: I have added python-attr 16.3.0 to our repo. Could you upgrade again?

[aleks-o]

python-attr upgraded to 16.3.0-1 and now synapse can start without errors.
@richvdh , thanks!

[richvdh]

sorry for the snafu