I left some of the 'ceph pg dump' commands running and twice they returned
results after 30 minutes, and three times it took 45 minutes. Is there
something that runs every 15 minutes that would let these commands finish?
Bryan
From: Bryan Stillwell <bstillw...@godaddy.com>
Date: Thursday, October 18, 2018 at 11:16 AM
To: "ceph-users@lists.ceph.com" <ceph-users@lists.ceph.com>
Subject: ceph-mgr hangs on larger clusters in Luminous
After we upgraded from Jewel (10.2.10) to Luminous (12.2.5) we started seeing a
problem where the new ceph-mgr would sometimes hang indefinitely when doing
commands like 'ceph pg dump' on our largest cluster (~1,300 OSDs). The rest of
our clusters (10+) aren't seeing the same issue, but they are all under 600
OSDs each. Restarting ceph-mgr seems to fix the issue for 12 hours or so, but
usually overnight it'll get back into the state where the hang reappears. At
first I thought it was a hardware issue, but switching the primary ceph-mgr to
another node didn't fix the problem.
I've increased the logging to 20/20 for debug_mgr, and while a working dump
looks like this:
2018-10-18 09:26:16.256911 7f9dbf5e7700 4 mgr.server handle_command decoded 3
2018-10-18 09:26:16.256917 7f9dbf5e7700 4 mgr.server handle_command prefix=pg
dump
2018-10-18 09:26:16.256937 7f9dbf5e7700 10 mgr.server _allowed_command
client.admin capable
2018-10-18 09:26:16.256951 7f9dbf5e7700 0 log_channel(audit) log [DBG] :
from='client.1414554763 10.2.4.2:0/2175076978' entity='client.admin'
cmd=[{"prefix": "pg dump", "target": ["mgr", ""], "format": "json-pretty"}]:
dispatch
2018-10-18 09:26:22.567583 7f9dbf5e7700 1 mgr.server reply handle_command (0)
Success dumped all
A failed dump call doesn't show up at all. The "mgr.server handle_command
prefix=pg dump" log entry doesn't seem to even make it to the logs.
This problem also continued to appear after upgrading to 12.2.8.
Has anyone else seen this?
Thanks,
Bryan
_______________________________________________
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
