Comment 2 for bug 1835354

I can see the same error on bionic-stein.

2019-07-12 07:21:26.665 7f5c1d348300 0 set uid:gid to 64045:64045 (ceph:ceph)
2019-07-12 07:21:26.665 7f5c1d348300 0 ceph version 13.2.6 (7b695f835b03642f85998b2ae7b6dd093d9fbce4) mimic (stable), process ceph-mgr, pid 64002
2019-07-12 07:21:26.669 7f5c1d348300 0 pidfile_write: ignore empty --pid-file
2019-07-12 07:21:26.701 7f5c1d348300 1 mgr[py] Loading python module 'balancer'
2019-07-12 07:21:26.769 7f5c1d348300 1 mgr[py] Loading python module 'crash'
2019-07-12 07:21:26.813 7f5c1d348300 -1 mgr[py] Module not found: 'crash'
2019-07-12 07:21:26.813 7f5c1d348300 -1 mgr[py] Traceback (most recent call last):
  File "/usr/lib/x86_64-linux-gnu/ceph/mgr/crash/__init__.py", line 1, in <module>
    from .module import Module
  File "/usr/lib/x86_64-linux-gnu/ceph/mgr/crash/module.py", line 48
    def inner((_, meta)):
              ^
SyntaxError: invalid syntax

2019-07-12 07:21:26.813 7f5c1d348300 -1 mgr[py] Class not found in module 'crash'
2019-07-12 07:21:26.813 7f5c1d348300 -1 mgr[py] Error loading module 'crash': (2) No such file or directory
2019-07-12 07:21:26.813 7f5c1d348300 1 mgr[py] Loading python module 'dashboard'
2019-07-12 07:21:27.257 7f5c1d348300 1 mgr[py] Loading python module 'hello'
2019-07-12 07:21:27.301 7f5c1d348300 1 mgr[py] Loading python module 'influx'
2019-07-12 07:21:27.349 7f5c1d348300 1 mgr[py] Loading python module 'iostat'
2019-07-12 07:21:27.389 7f5c1d348300 1 mgr[py] Loading python module 'localpool'
2019-07-12 07:21:27.429 7f5c1d348300 1 mgr[py] Loading python module 'prometheus'
2019-07-12 07:21:27.793 7f5c1d348300 1 mgr[py] Loading python module 'restful'
2019-07-12 07:21:28.121 7f5c1d348300 1 mgr[py] Loading python module 'selftest'
2019-07-12 07:21:28.233 7f5c1d348300 1 mgr[py] Loading python module 'smart'
2019-07-12 07:21:28.273 7f5c1d348300 1 mgr[py] Loading python module 'status'
2019-07-12 07:21:28.329 7f5c1d348300 1 mgr[py] Loading python module 'telegraf'
2019-07-12 07:21:28.381 7f5c1d348300 1 mgr[py] Loading python module 'telemetry'
2019-07-12 07:21:28.637 7f5c1d348300 1 mgr[py] Loading python module 'zabbix'
2019-07-12 07:21:28.789 7f5c1d348300 -1 log_channel(cluster) log [ERR] : Failed to load ceph-mgr modules: crash
2019-07-12 07:21:28.789 7f5c1d348300 1 mgr send_beacon standby
2019-07-12 07:21:28.817 7f5c09be3700 0 ms_deliver_dispatch: unhandled message 0x55de1e1a7d40 mon_map magic: 0 v1 from mon.2 10.246.68.52:6789/0
2019-07-12 07:21:28.817 7f5c09be3700 0 client.0 ms_handle_reset on 10.246.68.40:6800/112543
2019-07-12 07:21:30.813 7f5c063dc700 1 mgr send_beacon standby
2019-07-12 07:21:32.837 7f5c063dc700 1 mgr send_beacon standby
2019-07-12 07:21:34.861 7f5c063dc700 1 mgr send_beacon standby
2019-07-12 07:21:36.885 7f5c063dc700 1 mgr send_beacon standby