Are you running multiple active MDS daemons? On MDS host issue "ceph-daemon mds.X config set debug_mds 20" for maximum logging verbosity.
> On 16.10.2018, at 19:23, Florent B <flor...@coppint.com> wrote: > > Hi, > > A few months ago I sent a message to that list about a problem with a > Ceph + Dovecot setup. > > Bug disappeared and I didn't answer to the thread. > > Now the bug has come again (Luminous up-to-date cluster + Dovecot > up-to-date + Debian Stretch up-to-date). > > I know how to reproduce it, but it seems very related to my user's > Dovecot data (few GB) and is related to file locking system (bug occurs > when I set locking method to "fcntl" or "flock" in Dovecot, but not with > "dotlock". > > It ends to a unresponsive MDS (100% CPU hang, switching to another MDS > but always staying at 100% CPU usage). I can't even use the admin socket > when MDS is hanged. > > I would like to know *exactly* which information do you need to > investigate that bug ? (which commands, when, how to report large log > files...) > > Thank you. > > Florent > > > _______________________________________________ > 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
