Ceph » Messengers

On fresh 12.1.0 install (and then 12.1.0-707), with bluestore + fuse + cephfs + ec_overwrites, I got some OSD flapping under write pressure.

Stacktrace here :

    -2> <date> 7fe375393700  0 -- <osd_ip>:6821/53900 >> <ip>:0/1074864065 conn(0x7fe3bc26d800 :6821 s=STATE_OPEN pgs=1126 cs=1 l=1).process bad tag 50
    -1> <date> 7fe375393700  0 -- <osd_ip>:6821/53900 >> <ip>:0/1074864065 conn(0x7fe3a3e6d000 :6821 s=STATE_OPEN pgs=1128 cs=1 l=1).process bad tag 50
     0> <date> 7fe375393700 -1 *** Caught signal (Aborted) **
 in thread 7fe375393700 thread_name:msgr-worker-0

 ceph version 12.1.0-707-g5a197c5 (5a197c5817f591fc514f55b9929982e90d90084e) luminous (rc)
 1: (()+0x9f2f71) [0x7fe37b24ef71]
 2: (()+0xf370) [0x7fe377e8c370]
 3: (gsignal()+0x37) [0x7fe376eb61d7]
 4: (abort()+0x148) [0x7fe376eb78c8]
 5: (__gnu_cxx::__verbose_terminate_handler()+0x165) [0x7fe3777ba9d5]
 6: (()+0x5e946) [0x7fe3777b8946]
 7: (()+0x5e973) [0x7fe3777b8973]
 8: (()+0xb52c5) [0x7fe37780f2c5]
 9: (()+0x7dc5) [0x7fe377e84dc5]
 10: (clone()+0x6d) [0x7fe376f7876d]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

--- logging levels ---
   0/ 5 none
   0/ 1 lockdep
   0/ 1 context
   1/ 1 crush
   2/ 2 mds
   1/ 5 mds_balancer
...

Seems legit suicide on OSD side refering to src/msg/async/AsyncConnection.cc.

Tried to find root cause without success.