Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-27 Thread thoralf schulze
hi Zheng, On 8/26/19 3:31 PM, Yan, Zheng wrote: […] > change code to : […] we can happily confirm that this resolves the issue. thank you _very_ much & with kind regards, t. signature.asc Description: OpenPGP digital signature ___ ceph-users

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-26 Thread Yan, Zheng
On Mon, Aug 26, 2019 at 9:25 PM thoralf schulze wrote: > > hi Zheng - > > On 8/26/19 2:55 PM, Yan, Zheng wrote: > > I tracked down the bug > > https://tracker.ceph.com/issues/41434 > > wow, that was quick - thank you for investigating. we are looking > forward for the fix :-) > > in the meantime,

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-26 Thread thoralf schulze
hi Zheng - On 8/26/19 2:55 PM, Yan, Zheng wrote: > I tracked down the bug > https://tracker.ceph.com/issues/41434 wow, that was quick - thank you for investigating. we are looking forward for the fix :-) in the meantime, is there anything we can do to prevent q == p->second.end() from

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-26 Thread Yan, Zheng
On Mon, Aug 26, 2019 at 6:57 PM thoralf schulze wrote: > > hi Zheng, > > On 8/21/19 4:32 AM, Yan, Zheng wrote: > > Please enable debug mds (debug_mds=10), and try reproducing it again. > > please find the logs at > https://www.user.tu-berlin.de/thoralf.schulze/ceph-debug.tar.xz . > > we managed

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-26 Thread thoralf schulze
hi Zheng, On 8/21/19 4:32 AM, Yan, Zheng wrote: > Please enable debug mds (debug_mds=10), and try reproducing it again. please find the logs at https://www.user.tu-berlin.de/thoralf.schulze/ceph-debug.tar.xz . we managed to reproduce the issue as a worst case scenario: before snapshotting,

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-21 Thread thoralf schulze
hi zheng, On 8/21/19 4:32 AM, Yan, Zheng wrote: > Please enable debug mds (debug_mds=10), and try reproducing it again. we will get back with the logs on monday. thank you & with kind regards, t. signature.asc Description: OpenPGP digital signature

Re: [ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-20 Thread Yan, Zheng
On Tue, Aug 20, 2019 at 9:43 PM thoralf schulze wrote: > > hi there, > > we are struggling with the creation of cephfs-snapshots: doing so > reproducible causes a failover of our metadata servers. afterwards, the > demoted mds servers won't be available as standby servers and the mds > daemons on

[ceph-users] cephfs-snapshots causing mds failover, hangs

2019-08-20 Thread thoralf schulze
hi there, we are struggling with the creation of cephfs-snapshots: doing so reproducible causes a failover of our metadata servers. afterwards, the demoted mds servers won't be available as standby servers and the mds daemons on these machines have to be manually restarted. more often than we