On Wed, Feb 3, 2016 at 1:21 AM, Nikola Ciprich <nikola.cipr...@linuxbox.cz> wrote: > Hello fellow ceph users and developers > > few days ago, I've update one our small cluster > (three nodes) to kernel 4.1.15. Today I got cephfs > stuck on one of the nodes. > > cpeh -s reports: > mds0: Behind on trimming (155/30) > > restarting all MDS servers didn't help. > > all three cluster nodes are running hammer 0.94.5 on > Centos 6, kernel 4.1.15. > > Each node runs 7 OSD daemons, monitor and MDS server > (I know it's better to run those daemons separately, but > we were tight on budget here and hardware should be sufficient)
What's the full output of "ceph -s"? Have you looked at the MDS admin socket at all — what state does it say it's in? -Greg > > My question here is: > > 1) is there some known issue with hammer 0.94.5 or kernel 4.1.15 > which could lead to cephfs hangs? > > 2) what can I do to debug what is the cause of this hang? > > 3) is there a way to recover this without hard resetting > node with hung cephfs mount? > > If I could provide more information, please let me know > > I'd really appreciate any help > > with best regards > > nik > > > > > -- > ------------------------------------- > Ing. Nikola CIPRICH > LinuxBox.cz, s.r.o. > 28.rijna 168, 709 00 Ostrava > > tel.: +420 591 166 214 > fax: +420 596 621 273 > mobil: +420 777 093 799 > www.linuxbox.cz > > mobil servis: +420 737 238 656 > email servis: ser...@linuxbox.cz > ------------------------------------- > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
