secondary mds fail bt

[New LWP 3155]
[New LWP 3156]
[New LWP 3157]
[New LWP 3158]
[New LWP 3159]
[New LWP 3160]
[New LWP 3161]
[New LWP 3162]
[New LWP 3163]
[New LWP 3164]
[New LWP 3165]
[New LWP 3166]
[New LWP 3167]
[New LWP 3168]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
185     ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: No such file or directory.
Copying output to gdb.txt.
Continuing.
[New Thread 0x7f149b99e700 (LWP 3255)]
[New Thread 0x7f149b19d700 (LWP 3256)]
[New Thread 0x7f149a99c700 (LWP 3257)]
[New Thread 0x7f149a19b700 (LWP 3258)]
[New Thread 0x7f149999a700 (LWP 3259)]
[New Thread 0x7f1499199700 (LWP 3260)]
[New Thread 0x7f1498998700 (LWP 3261)]
[Thread 0x7f1499199700 (LWP 3260) exited]
[New Thread 0x7f1498197700 (LWP 3262)]
[Thread 0x7f1498197700 (LWP 3262) exited]

---Type <return> to continue, or q <return> to quit---

Thread 8 "ms_dispatch" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f149f9a6700 (LWP 3161)]
0x0000559c5a2a58c2 in Server::handle_client_getattr (this=this@entry=0x559c63ad3870, mdr=..., is_lookup=is_lookup@entry=true) at /build/ceph-12.2.5/src/mds/Server.cc:3065
3065    /build/ceph-12.2.5/src/mds/Server.cc: No such file or directory.
(gdb) bt
#0  0x0000559c5a2a58c2 in Server::handle_client_getattr (this=this@entry=0x559c63ad3870, mdr=..., is_lookup=is_lookup@entry=true) at /build/ceph-12.2.5/src/mds/Server.cc:3065
#1  0x0000559c5a2dd98b in Server::dispatch_client_request (this=this@entry=0x559c63ad3870, mdr=...) at /build/ceph-12.2.5/src/mds/Server.cc:1802
#2  0x0000559c5a2dde9b in Server::handle_client_request (this=this@entry=0x559c63ad3870, req=req@entry=0x559c63d33d40) at /build/ceph-12.2.5/src/mds/Server.cc:1716
#3  0x0000559c5a2e27b6 in Server::dispatch (this=0x559c63ad3870, m=m@entry=0x559c63d33d40) at /build/ceph-12.2.5/src/mds/Server.cc:258
#4  0x0000559c5a24bfac in MDSRank::handle_deferrable_message (this=this@entry=0x559c63d4b000, m=m@entry=0x559c63d33d40) at /build/ceph-12.2.5/src/mds/MDSRank.cc:716
#5  0x0000559c5a25a5cb in MDSRank::_dispatch (this=this@entry=0x559c63d4b000, m=m@entry=0x559c63d33d40, new_msg=new_msg@entry=true) at /build/ceph-12.2.5/src/mds/MDSRank.cc:551
#6  0x0000559c5a25b455 in MDSRankDispatcher::ms_dispatch (this=0x559c63d4b000, m=m@entry=0x559c63d33d40) at /build/ceph-12.2.5/src/mds/MDSRank.cc:530
#7  0x0000559c5a243d8b in MDSDaemon::ms_dispatch (this=0x559c63bcca00, m=0x559c63d33d40) at /build/ceph-12.2.5/src/mds/MDSDaemon.cc:1133
#8  0x0000559c5a8e88aa in Messenger::ms_deliver_dispatch (m=0x559c63d33d40, this=0x559c63bf6000) at /build/ceph-12.2.5/src/msg/Messenger.h:668
#9  DispatchQueue::entry (this=0x559c63bf6180) at /build/ceph-12.2.5/src/msg/DispatchQueue.cc:197
#10 0x0000559c5a63374d in DispatchQueue::DispatchThread::entry (this=<optimized out>) at /build/ceph-12.2.5/src/msg/DispatchQueue.h:101
#11 0x00007f14a54996ba in start_thread (arg=0x7f149f9a6700) at pthread_create.c:333
#12 0x00007f14a450541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109