Hi Yan, thanks for the advice. I will umount the cephfs on osd servers and
keep an eye on it.:)
Yan, Zheng <uker...@gmail.com> 于2018年8月7日周二 下午7:51写道：
> On Tue, Aug 7, 2018 at 7:15 PM Zhenshi Zhou <deader...@gmail.com> wrote:
> >
> > Yes, some osd servers mount cephfs
> >
>
> this can cause memory deadlock. you should avoid doing this
>
> > Yan, Zheng <uker...@gmail.com>于2018年8月7日 周二19:12写道：
> >>
> >> did you mount cephfs on the same machines that run ceph-osd?
> >>
> >> On Tue, Aug 7, 2018 at 5:14 PM Zhenshi Zhou <deader...@gmail.com>
> wrote:
> >> >
> >> > Hi Burkhard,
> >> > Files located in /sys/kernel/debug/ceph/<some id> are all new files
> generated after I reboot the server.
> >> > The clients were in blacklist and I manully remove them from the
> blacklist. But the clients hung still.
> >> >
> >> > Thanks
> >> >
> >> > Burkhard Linke <burkhard.li...@computational.bio.uni-giessen.de>
> 于2018年8月7日周二 下午4:54写道：
> >> >>
> >> >> Hi,
> >> >>
> >> >>
> >> >> you are using the kernel implementation of CephFS. In this case some
> >> >> information can be retrieved from the /sys/kernel/debug/ceph/<some
> id>
> >> >> directory. Especially the mdsc, monc and osdc files are important,
> since
> >> >> they contain pending operations on mds, mon and osds.
> >> >>
> >> >>
> >> >> We have a similar problem in our setup. If a MDS failover happens,
> some
> >> >> clients (like 1 in 100 clients) do not react to the MDS map change
> and
> >> >> keep on trying to contact the old MDS. In this case the msdc file in
> the
> >> >> above mentioned directory lists from outstanding requests to the old
> MDS.
> >> >>
> >> >>
> >> >> I would propose to start by having a look at these files and also at
> the
> >> >> ceph client blacklist ('ceph osd blacklist ls').
> >> >>
> >> >>
> >> >> Regards,
> >> >>
> >> >> Burkhard
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> 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
>
_______________________________________________
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
