CANT_REREAD: Format string in Celery .%h

Question

In my supervisor file I have added `.%h` to the end of my worker names (celery) to make them unique. For example: ``` [program:celery_worker] directory = /srv/project/ command=celery -A tasks worker -l info -n default.%h ``` However, since added this change supervisor will not longer update or start giving the error: , "CANT_REREAD: Format string 'celery -A tasks worker -l info -n default.%h' for 'command' is badly formatted""> file: /usr/lib/python2.7/dist-packages/supervisor/supervisorctl.py line: 947 How can I resolve this issue?

Accepted Answer

This is an underdocumented issue: https://github.com/Supervisor/supervisor/issues/291

Just use `%` again to escape it:

```
command=celery -A tasks worker -l info -n default.%%h
```

CANT_REREAD: Format string in Celery .%h

Solution

Problem