[246392.068877] ceph: mds1 caps stale
[246412.069525] ceph: mds1 caps stale
[246637.069425] ceph: mds1 hung
[247278.947909] libceph: mon4 84.2.x.x:6789 socket closed
[247278.947964] libceph: mon4 84.2.x.x:6789 session lost, hunting for new mon
[247279.255437] ceph: mds1 reconnect start
[247279.259189] libceph: mon1 84.2.x.x:6789 session established
[247279.282367] ceph: mds1 reconnect denied
[247339.317887] INFO: rcu_sched_state detected stall on CPU 3 (t=15000 jiffies)
[247450.033864] INFO: task lighttpd:24396 blocked for more than 120 seconds.
[247450.033921] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[247450.034004] lighttpd        D ffff8804266f4958     0 24396      1 0x00000004
[247450.034009]  ffff88041f8f9b98 0000000000000082 0000000000000282 ffffffff8161202e
[247450.034013]  0000000000012ac0 ffff88041f8f9fd8 ffff88041f8f8010 0000000000012ac0
[247450.034017]  ffff88041f8f9fd8 0000000000012ac0 ffff880426d1dcc0 ffff8804266f4590
[247450.034020] Call Trace:
[247450.034029]  [<ffffffff8161202e>] ? reschedule_interrupt+0xe/0x20
[247450.034033]  [<ffffffff81606e0f>] schedule+0x3f/0x60
[247450.034037]  [<ffffffff81607c1f>] __mutex_lock_slowpath+0xdf/0x160
[247450.034040]  [<ffffffff81607693>] mutex_lock+0x23/0x40
[247450.034048]  [<ffffffffa01b0870>] ceph_mdsc_do_request+0xe0/0x1a0 [ceph]
[247450.034053]  [<ffffffffa0199535>] ceph_do_getattr+0xe5/0x110 [ceph]
[247450.034058]  [<ffffffffa019969d>] ceph_permission+0x3d/0x60 [ceph]
[247450.034062]  [<ffffffff8117f885>] link_path_walk+0x415/0x920
[247450.034065]  [<ffffffff8117ff00>] path_openat+0xb0/0x3e0
[247450.034070]  [<ffffffff8113875b>] ? handle_mm_fault+0x26b/0x3b0
[247450.034072]  [<ffffffff81180349>] do_filp_open+0x49/0xa0
[247450.034077]  [<ffffffff8160c8f0>] ? do_page_fault+0x1f0/0x4a0
[247450.034080]  [<ffffffff81608dce>] ? _raw_spin_lock+0xe/0x20
[247450.034083]  [<ffffffff8118df9a>] ? alloc_fd+0x10a/0x150
[247450.034088]  [<ffffffff81170da6>] do_sys_open+0x106/0x240
[247450.034091]  [<ffffffff81170f20>] sys_open+0x20/0x30
[247450.034094]  [<ffffffff81611182>] system_call_fastpath+0x16/0x1b