Hello Yesterday I upgraded my cluster to v12.2.9.But the mons still failed for the same reason.And when I run 'ceph versions', it returned " "mds": { "ceph version 12.2.8 (ae699615bac534ea496ee965ac6192cb7e0e07c0) luminous (stable)": 1, "ceph version 12.2.9 (9e300932ef8a8916fb3fda78c58691a6ab0f4217) luminous (stable)": 4 }, " But actually I only have four MDS , and their versions are all v12.2.9 .I am confused about it. The cause of the mon's fail may be helpful. I have 2 mds up:active and 2 mds up:standy at that time. Then I stopped two standby mds and the mds in rank 1 , only the mds in rank 0 was active. After restart the 3 mds , they all became standby . And the cluster told me rank 1 was damaged. At the same time,the monitor failed in thread_name:safe_timer. Though the rank 1 was repaired ,the mon still failed. Is there anything I can do to repair the mons ? Loukaiyi -----Original Message----- From: 楼锴毅 Sent: Tuesday, November 20, 2018 1:49 PM To: 'Patrick Donnelly' Cc: Ceph Users Subject: RE: mon:failed in thread_name:safe_timer Thanks for reply . But I noticed that in https://tracker.ceph.com/issues/35848 , monitor failed in thread_name:fn_monstore, and didn't mention about safe_timer. Will the solution for the issues:35848 work in my problem? When I try to upgrade the cluster to v12.2.9, I noticed that the v12.2.9 is not recommended, v12.2.10 may be better,so I wonder when v12.2.10 will be released? Thanks a lot ! LouKaiyi -----Original Message----- From: Patrick Donnelly [mailto:pdonnell@xxxxxxxxxx] Sent: Tuesday, November 20, 2018 11:29 AM To: 楼锴毅 Cc: Ceph Users Subject: Re: mon:failed in thread_name:safe_timer On Mon, Nov 19, 2018 at 7:17 PM 楼锴毅 <loukaiyi_sx@xxxxxxxx> wrote: > sorry to disturb , but recently when I use ceph(12.2.8),I found that the leader monitor will always failed in thread_name:safe_timer. > [...] Try upgrading the mons to v12.2.9 (but see recent warnings concerning upgrades to v12.2.9 for the OSDs): https://tracker.ceph.com/issues/35848 -- Patrick Donnelly _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com