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 >
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