No messages in dmesg, I've updated the two clients to 3.16, we'll see if that fixes this issue. On Fri, Sep 5, 2014 at 12:28 AM, Yan, Zheng <ukernel at gmail.com> wrote: > On Fri, Sep 5, 2014 at 8:42 AM, James Devine <fxmulder at gmail.com> wrote: > > I'm using 3.13.0-35-generic on Ubuntu 14.04.1 > > > > Was there any kernel message when the hang happened? We have fixed a > few bugs since 3.13 kernel, please use 3.16 kernel if possible. > > Yan, Zheng > > > > > On Thu, Sep 4, 2014 at 6:08 PM, Yan, Zheng <ukernel at gmail.com> wrote: > >> > >> On Fri, Sep 5, 2014 at 3:24 AM, James Devine <fxmulder at gmail.com> > wrote: > >> > It took a week to happen again, I had hopes that it was fixed but alas > >> > it is > >> > not. Looking at top logs on the active mds server, the load average > was > >> > 0.00 the whole time and memory usage never changed much, it is using > >> > close > >> > to 100% and some swap but since I changed memory.swappiness swap usage > >> > hasn't gone up but has been slowly coming back down. Same symptoms, > the > >> > mount on the client is unresponsive and a cat on > >> > /sys/kernel/debug/ceph/*/mdsc had a whole list of entries. A umount > and > >> > remount seems to fix it. > >> > > >> > >> which version of kernel do you use ? > >> > >> Yan, Zheng > >> > >> > > >> > On Fri, Aug 29, 2014 at 11:26 AM, James Devine <fxmulder at gmail.com> > >> > wrote: > >> >> > >> >> I am running active/standby and it didn't swap over to the standby. > If > >> >> I > >> >> shutdown the active server it swaps to the standby fine though. When > >> >> there > >> >> were issues, disk access would back up on the webstats servers and a > >> >> cat of > >> >> /sys/kernel/debug/ceph/*/mdsc would have a list of entries whereas > >> >> normally > >> >> it would only list one or two if any. I have 4 cores and 2GB of ram > on > >> >> the > >> >> mds machines. Watching it right now it is using most of the ram and > >> >> some of > >> >> swap although most of the active ram is disk cache. I lowered the > >> >> memory.swappiness value to see if that helps. I'm also logging top > >> >> output > >> >> if it happens again. > >> >> > >> >> > >> >> On Thu, Aug 28, 2014 at 8:22 PM, Yan, Zheng <ukernel at gmail.com> > wrote: > >> >>> > >> >>> On Fri, Aug 29, 2014 at 8:36 AM, James Devine <fxmulder at gmail.com> > >> >>> wrote: > >> >>> > > >> >>> > On Thu, Aug 28, 2014 at 1:30 PM, Gregory Farnum <greg at inktank.com > > > >> >>> > wrote: > >> >>> >> > >> >>> >> On Thu, Aug 28, 2014 at 10:36 AM, Brian C. Huffman > >> >>> >> <bhuffman at etinternational.com> wrote: > >> >>> >> > Is Ceph Filesystem ready for production servers? > >> >>> >> > > >> >>> >> > The documentation says it's not, but I don't see that mentioned > >> >>> >> > anywhere > >> >>> >> > else. > >> >>> >> > http://ceph.com/docs/master/cephfs/ > >> >>> >> > >> >>> >> Everybody has their own standards, but Red Hat isn't supporting > it > >> >>> >> for > >> >>> >> general production use at this time. If you're brave you could > test > >> >>> >> it > >> >>> >> under your workload for a while and see how it comes out; the > known > >> >>> >> issues are very much workload-dependent (or just general concerns > >> >>> >> over > >> >>> >> polish). > >> >>> >> -Greg > >> >>> >> Software Engineer #42 @ http://inktank.com | http://ceph.com > >> >>> >> _______________________________________________ > >> >>> >> ceph-users mailing list > >> >>> >> ceph-users at lists.ceph.com > >> >>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> >>> > > >> >>> > > >> >>> > > >> >>> > I've been testing it with our webstats since it gets live hits but > >> >>> > isn't > >> >>> > customer affecting. Seems the MDS server has problems every few > >> >>> > days > >> >>> > requiring me to umount and remount the ceph disk to resolve. Not > >> >>> > sure > >> >>> > if > >> >>> > the issue is resolved in development versions but as of 0.80.5 we > >> >>> > seem > >> >>> > to be > >> >>> > hitting it. I set the log verbosity to 20 so there's tons of logs > >> >>> > but > >> >>> > ends > >> >>> > with > >> >>> > >> >>> The cephfs client is supposed to be able to handle MDS takeover. > >> >>> what's symptom makes you umount and remount the cephfs ? > >> >>> > >> >>> > > >> >>> > 2014-08-24 07:10:19.682015 7f2b575e7700 10 mds.0.14 laggy, > >> >>> > deferring > >> >>> > client_request(client.92141:6795587 getattr pAsLsXsFs > #10000026dc1) > >> >>> > 2014-08-24 07:10:19.682021 7f2b575e7700 5 mds.0.14 is_laggy > >> >>> > 19.324963 > >> >>> > > 15 > >> >>> > since last acked beacon > >> >>> > 2014-08-24 07:10:20.358011 7f2b554e2700 10 mds.0.14 beacon_send > >> >>> > up:active > >> >>> > seq 127220 (currently up:active) > >> >>> > 2014-08-24 07:10:21.515899 7f2b575e7700 5 mds.0.14 is_laggy > >> >>> > 21.158841 > >> >>> > > 15 > >> >>> > since last acked beacon > >> >>> > 2014-08-24 07:10:21.515912 7f2b575e7700 10 mds.0.14 laggy, > >> >>> > deferring > >> >>> > client_session(request_renewcaps seq 26766) > >> >>> > 2014-08-24 07:10:21.515915 7f2b575e7700 5 mds.0.14 is_laggy > >> >>> > 21.158857 > >> >>> > > 15 > >> >>> > since last acked beacon > >> >>> > 2014-08-24 07:10:21.981148 7f2b575e7700 10 mds.0.snap > check_osd_map > >> >>> > need_to_purge={} > >> >>> > 2014-08-24 07:10:21.981176 7f2b575e7700 5 mds.0.14 is_laggy > >> >>> > 21.624117 > >> >>> > > 15 > >> >>> > since last acked beacon > >> >>> > 2014-08-24 07:10:23.170528 7f2b575e7700 5 mds.0.14 handle_mds_map > >> >>> > epoch 93 > >> >>> > from mon.0 > >> >>> > 2014-08-24 07:10:23.175367 7f2b532d5700 0 -- > >> >>> > 10.251.188.124:6800/985 > >> >>> > >> > >> >>> > 10.251.188.118:0/2461578479 pipe(0x5588a80 sd=23 :6800 s=2 pgs=91 > >> >>> > cs=1 > >> >>> > l=0 > >> >>> > c=0x2cbfb20).fault with nothing to send, going to standby > >> >>> > 2014-08-24 07:10:23.175376 7f2b533d6700 0 -- > >> >>> > 10.251.188.124:6800/985 > >> >>> > >> > >> >>> > 10.251.188.55:0/306923677 pipe(0x5588d00 sd=22 :6800 s=2 pgs=7 > cs=1 > >> >>> > l=0 > >> >>> > c=0x2cbf700).fault with nothing to send, going to standby > >> >>> > 2014-08-24 07:10:23.175380 7f2b531d4700 0 -- > >> >>> > 10.251.188.124:6800/985 > >> >>> > >> > >> >>> > 10.251.188.31:0/2854230502 pipe(0x5589480 sd=24 :6800 s=2 pgs=881 > >> >>> > cs=1 > >> >>> > l=0 > >> >>> > c=0x2cbfde0).fault with nothing to send, going to standby > >> >>> > 2014-08-24 07:10:23.175438 7f2b534d7700 0 -- > >> >>> > 10.251.188.124:6800/985 > >> >>> > >> > >> >>> > 10.251.188.68:0/2928927296 pipe(0x5588800 sd=21 :6800 s=2 pgs=7 > cs=1 > >> >>> > l=0 > >> >>> > c=0x2cbf5a0).fault with nothing to send, going to standby > >> >>> > 2014-08-24 07:10:23.184201 7f2b575e7700 10 mds.0.14 my compat > >> >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable > >> >>> > ranges,3=default file layouts on dirs,4=dir inode in separate > >> >>> > object,5=mds > >> >>> > uses versioned encoding,6=dirfrag is stored in omap,7=mds uses > >> >>> > inline > >> >>> > data} > >> >>> > 2014-08-24 07:10:23.184255 7f2b575e7700 10 mds.0.14 mdsmap compat > >> >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable > >> >>> > ranges,3=default file layouts on dirs,4=dir inode in separate > >> >>> > object,5=mds > >> >>> > uses versioned encoding,6=dirfrag is stored in omap} > >> >>> > 2014-08-24 07:10:23.184264 7f2b575e7700 10 mds.-1.-1 map says i am > >> >>> > 10.251.188.124:6800/985 mds.-1.-1 state down:dne > >> >>> > 2014-08-24 07:10:23.184275 7f2b575e7700 10 mds.-1.-1 peer mds gid > >> >>> > 94665 > >> >>> > removed from map > >> >>> > 2014-08-24 07:10:23.184282 7f2b575e7700 1 mds.-1.-1 > handle_mds_map > >> >>> > i > >> >>> > (10.251.188.124:6800/985) dne in the mdsmap, respawning myself > >> >>> > 2014-08-24 07:10:23.184284 7f2b575e7700 1 mds.-1.-1 respawn > >> >>> > 2014-08-24 07:10:23.184286 7f2b575e7700 1 mds.-1.-1 e: > >> >>> > '/usr/bin/ceph-mds' > >> >>> > 2014-08-24 07:10:23.184288 7f2b575e7700 1 mds.-1.-1 0: > >> >>> > '/usr/bin/ceph-mds' > >> >>> > 2014-08-24 07:10:23.184289 7f2b575e7700 1 mds.-1.-1 1: '-i' > >> >>> > 2014-08-24 07:10:23.184290 7f2b575e7700 1 mds.-1.-1 2: > >> >>> > 'ceph-cluster1-mds2' > >> >>> > 2014-08-24 07:10:23.184291 7f2b575e7700 1 mds.-1.-1 3: > >> >>> > '--pid-file' > >> >>> > 2014-08-24 07:10:23.184292 7f2b575e7700 1 mds.-1.-1 4: > >> >>> > '/var/run/ceph/mds.ceph-cluster1-mds2.pid' > >> >>> > 2014-08-24 07:10:23.184293 7f2b575e7700 1 mds.-1.-1 5: '-c' > >> >>> > 2014-08-24 07:10:23.184294 7f2b575e7700 1 mds.-1.-1 6: > >> >>> > '/etc/ceph/ceph.conf' > >> >>> > 2014-08-24 07:10:23.184295 7f2b575e7700 1 mds.-1.-1 7: > '--cluster' > >> >>> > 2014-08-24 07:10:23.184296 7f2b575e7700 1 mds.-1.-1 8: 'ceph' > >> >>> > 2014-08-24 07:10:23.274640 7f2b575e7700 1 mds.-1.-1 exe_path > >> >>> > /usr/bin/ceph-mds > >> >>> > 2014-08-24 07:10:23.606875 7f4c55abb800 0 ceph version 0.80.5 > >> >>> > (38b73c67d375a2552d8ed67843c8a65c2c0feba6), process ceph-mds, pid > >> >>> > 987 > >> >>> > 2014-08-24 07:10:49.024862 7f4c506ad700 1 mds.-1.0 handle_mds_map > >> >>> > standby > >> >>> > 2014-08-24 07:10:49.199676 7f4c506ad700 0 mds.-1.0 > >> >>> > handle_mds_beacon > >> >>> > no > >> >>> > longer laggy > >> >>> > 2014-08-24 07:10:50.215240 7f4c506ad700 1 mds.-1.0 handle_mds_map > >> >>> > standby > >> >>> > 2014-08-24 07:10:51.290407 7f4c506ad700 1 mds.-1.0 handle_mds_map > >> >>> > standby > >> >>> > > >> >>> > > >> >>> > >> >>> Did you use active/standby MDS setup? Did the MDS use lots of > memory > >> >>> before it crashed? > >> >>> > >> >>> Regards > >> >>> Yan, Zheng > >> >>> > >> >>> > > >> >>> > _______________________________________________ > >> >>> > ceph-users mailing list > >> >>> > ceph-users at lists.ceph.com > >> >>> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> >>> > > >> >> > >> >> > >> > > >> > > >> > _______________________________________________ > >> > ceph-users mailing list > >> > ceph-users at lists.ceph.com > >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > > > > > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users at lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140905/1188f0fb/attachment.htm>
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