Hello all! I'm running luminous with old style non-bluestore OSDs. ceph
10.2.9 clients though, haven't been able to upgrade those yet.
Occasionally I have access to rbds hang on the client such as right now.
I tried to dd a VM image into a mapped rbd and it just hung.
Then I tried to map a new rbd and that hangs also.
How would I troubleshoot this? /var/log/ceph is empty, nothing in
/var/log/messages or dmesg etc.
I just discovered:
find /sys/kernel/debug/ceph -type f -print -exec cat {} \;
which produces (among other seemingly innocuous things, let me know if
anyone wants to see the rest):
osd2 (unknown sockaddr family 0) 0% (doesn't exist) 100%
which seems suspicious.
rbd ls works reliably. As does create. Cluster is healthy.
But the processes which hung trying to access that mapped rbd appear to
be completely unkillable. What
else should I check?
Thanks!
--
Tracy Reed
http://tracyreed.org
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