[soved by @woodrow] Matrix / Synapse : python[64603]: ModuleNotFoundError: No module named '\''attrs'\''

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The thread is locked. My problem was resolved by following @woodrow 's helpful instructions

My YunoHost server

Hardware: container on Proxmox
YunoHost version:
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no, I think not

Description of my issue

My Yunohost is still on Buster / 4.x, because I can’t do without Firefox sync server and I haven’t had the time yet to migrate the single app to another server that can stay at 4.x.

I ran apt update and apt upgrade via CLI. When logging in to the webadmin, the system was up to date, but a list of apps was not.

Synapse was among the outdated, so I let Yunohost run an upgrade of the app.

  • the upgrade failed (log)
  • the upgrade was unable to roll back and restore the backup
  • I checked: Matrix/Synapse was really removed from the system
  • I ran the restore manually as yunohost backup restore synapse-pre-upgrade2
  • there was a warning about restoring to an already installed system, which I ignored (what else to do?)
  • the restore seemed ok, until restarting the service: python[64603]: ModuleNotFoundError: No module named 'attrs' (log)
  • attrs seems available:
    # pip install attrs
    Requirement already satisfied: attrs in /usr/lib/python3/dist-packages (18.2.0)
  • pip did issue a warning though, WARNING: You are using pip version 21.3.1; however, version 22.3.1 is available.
  • after upgrading pip, I was still unable to restore Synapse: it still quits on attrs.

My first suspect is the apt upgrade I did just before the upgrade of Synapse: maybe a bit of Python got changed.

Any idea / suggestion where to go from here?

2

Hi!

Take a look at error while updating from 1.67.0~ynh1 to 1.69.0~ynh1 · Issue #349 · YunoHost-Apps/synapse_ynh · GitHub, that helped me!

3

Thanks for the tip!

My backup also does not have attrs in the Python3.9-path of the archive, but it is available in the Python3.7-path.

My pip runs on Python3.7, python itself still points to 2.7 (yezz…)

Trying to delete the corresponding 3.7 path from the archive,

tar -dvf synapse-pre-upgrade2.tar apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/`

, gives a page of warnings that the file or directory does not exist,

apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/
tar: apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info: Warning: Cannot stat: No such file or directory
apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/AUTHORS.rst
tar: apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/AUTHORS.rst: Warning: Cannot stat: No such file or directory

while testing the archive it actually is shown:

# tar -tvf synapse-pre-upgrade2.tar |grep apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/
drwxr-xr-x matrix-synapse/root       0 2021-01-28 13:09 apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/
-rw-r--r-- matrix-synapse/root     752 2021-01-28 13:08 apps/synapse/backup/opt/yunohost/matrix-synapse/lib/python3.7/site-packages/attrs-20.3.0.dist-info/AUTHORS.rst

The same goes for the whole python3.7 directory path.

What did you do to resolve the problem?

4

Nothing else than what was said on github. Sorry that doesn’t work for you.

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5

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