Hello everyone,
I'm experiencing a strange behaviour. My cluster is relatively small (43 OSDs, 11 nodes), running Ceph 12.2.10 (and Proxmox 5). Nodes are connected via 10 Gbit network (Nexus 6000). Cluster is mixed (SSD and HDD), but with different pools. Descibed error is only on the SSD part of the cluster.
I noticed that few times a day the cluster slows down a bit and I have discovered this in logs:
2019-02-22 08:21:20.064396 mon.node1 mon.0 172.16.254.101:6789/0 1794159 : cluster [WRN] Health check failed: 27 slow requests are blocked > 32 sec. Implicated osds 10,22,33 (REQUEST_SLOW)
2019-02-22 08:21:26.589202 mon.node1 mon.0 172.16.254.101:6789/0 1794169 : cluster [WRN] Health check update: 199 slow requests are blocked > 32 sec. Implicated osds 0,4,5,6,7,8,9,10,12,16,17,19,20,21,22,25,26,33,41 (REQUEST_SLOW)
2019-02-22 08:21:32.655671 mon.node1 mon.0 172.16.254.101:6789/0 1794183 : cluster [WRN] Health check update: 448 slow requests are blocked > 32 sec. Implicated osds 0,3,4,5,6,7,8,9,10,12,15,16,17,19,20,21,22,24,25,26,33,41 (REQUEST_SLOW)
2019-02-22 08:21:38.744210 mon.node1 mon.0 172.16.254.101:6789/0 1794210 : cluster [WRN] Health check update: 388 slow requests are blocked > 32 sec. Implicated osds 4,8,10,16,24,33 (REQUEST_SLOW)
2019-02-22 08:21:42.790346 mon.node1 mon.0 172.16.254.101:6789/0 1794214 : cluster [INF] Health check cleared: REQUEST_SLOW (was: 18 slow requests are blocked > 32 sec. Implicated osds 8,16)
2019-02-22 08:21:26.589202 mon.node1 mon.0 172.16.254.101:6789/0 1794169 : cluster [WRN] Health check update: 199 slow requests are blocked > 32 sec. Implicated osds 0,4,5,6,7,8,9,10,12,16,17,19,20,21,22,25,26,33,41 (REQUEST_SLOW)
2019-02-22 08:21:32.655671 mon.node1 mon.0 172.16.254.101:6789/0 1794183 : cluster [WRN] Health check update: 448 slow requests are blocked > 32 sec. Implicated osds 0,3,4,5,6,7,8,9,10,12,15,16,17,19,20,21,22,24,25,26,33,41 (REQUEST_SLOW)
2019-02-22 08:21:38.744210 mon.node1 mon.0 172.16.254.101:6789/0 1794210 : cluster [WRN] Health check update: 388 slow requests are blocked > 32 sec. Implicated osds 4,8,10,16,24,33 (REQUEST_SLOW)
2019-02-22 08:21:42.790346 mon.node1 mon.0 172.16.254.101:6789/0 1794214 : cluster [INF] Health check cleared: REQUEST_SLOW (was: 18 slow requests are blocked > 32 sec. Implicated osds 8,16)
"ceph health detail" shows nothing more
It is happening through the whole day and the times can't be linked to any read or write intensive task (e.g. backup). I also tried to disable scrubbing, but it kept on going. These errors were not there since beginning, but unfortunately I cannot track the day they started (it is beyond my logs).
Any ideas?
Thank you!
Martin
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