MDS [WRN] getattr pAsLsXsFs failed to rdlock

[Ilja Slepnev <islepnev@xxxxxxxxx>]

Dear All,

Configuration of MDS and CephFS client is the same:
OS: CentOS 7.0.1406
ceph-0.87
Linux 3.10.0-123.20.1.el7.centos.plus.x86_64

dmesg: libceph: loaded (mon/osd proto 15/24)
dmesg: ceph: loaded (mds proto 32)
Using kernel ceph module, fstab mount options: defaults,_netdev,ro,noatime,name=admin,secret=<hidden>

CephFS mount is exported by NFS.

Problem:

After period of light activity (reading files, listing dirs) one of the cephfs paths got stuck in directory listing process, on local machine and via NFS.

Log messages on MDS (repeating):
2015-02-24 16:02:41.564071 7fdb0055c700  0 log_channel(default) log [WRN] : 9 slow requests, 1 included below; oldest blocked for > 14463.448519 secs
2015-02-24 16:02:41.564077 7fdb0055c700  0 log_channel(default) log [WRN] : slow request 1922.318256 seconds old, received at 2015-02-24 15:30:39.245786: client_request(client.66401597:2440 getattr pAsLsXsFs #10000002d68) currently failed to rdlock, waiting

Could it be a broken metadata, or a bug? How to find out what is going wrong?

Is there a workaround?

WBR,

Ilja Slepnev

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com