Created attachment 1421310 [details]
/var/log/message logs

Description of problem:

Crefi IO's failed with below errors while MDS was in starting state.
> "OSError: [Errno 108] Cannot send after transport endpoint shutdown: '/mnt/cephfs/test4'"

Crefi IO profile:
 for i in create rename chmod chown chgrp symlink hardlink setxattr truncate; do sudo ./crefi.py --multi -b 10 -d 2 -n 10000 -t sparse --random --min=1K --max=64K /mnt/nfs/@#dir8/ ; done

FUSE assert:
ceph version 12.2.4-6.el7cp (78f60b924802e34d44f7078029a40dbe6c0c922f) luminous (stable)
 1: (()+0x66d2e1) [0x5652343a62e1]
 2: (()+0xf680) [0x7f077da88680]
 3: (gsignal()+0x37) [0x7f077c894207]
 4: (abort()+0x148) [0x7f077c8958f8]
 5: (Client::_do_remount()+0x2b1) [0x565233fc8d11]
 6: (Context::complete(int)+0x9) [0x565233fccac9]
 7: (Finisher::finisher_thread_entry()+0x198) [0x565234031428]
 8: (()+0x7dd5) [0x7f077da80dd5]
 9: (clone()+0x6d) [0x7f077c95cb3d]

Call trace in /var/log/messages:
Apr 11 07:31:26 magna117 kernel: INFO: task crefi.py:16811 blocked for more than 120 seconds.
Apr 11 07:31:26 magna117 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 11 07:31:26 magna117 kernel: crefi.py        D ffff92f01a752f70     0 16811      1 0x00000084
Apr 11 07:31:26 magna117 kernel: Call Trace:
Apr 11 07:31:26 magna117 kernel: [<ffffffffaa312f49>] schedule+0x29/0x70
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a394e5>] __fuse_request_send+0xf5/0x2e0 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9cbbe20>] ? wake_up_atomic_t+0x30/0x30
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a396e2>] fuse_request_send+0x12/0x20 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a3e8b1>] fuse_dentry_revalidate+0x1c1/0x310 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e26e7a>] lookup_fast+0x1da/0x230
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9ed0632>] ? security_inode_permission+0x22/0x30
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e28463>] link_path_walk+0x1b3/0x8b0
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9df7606>] ? kmem_cache_alloc_trace+0x1d6/0x200
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e2bca5>] path_openat+0xb5/0x640
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a39771>] ? flush_bg_queue+0x81/0xa0 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e2d85d>] do_filp_open+0x4d/0xb0
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e3acd7>] ? __alloc_fd+0x47/0x170
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e19b67>] do_sys_open+0x137/0x240
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e19c8e>] SyS_open+0x1e/0x20
Apr 11 07:31:26 magna117 kernel: [<ffffffffaa31f7d5>] system_call_fastpath+0x1c/0x21
Apr 11 07:31:26 magna117 kernel: INFO: task crefi.py:18471 blocked for more than 120 seconds.
Apr 11 07:31:26 magna117 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 11 07:31:26 magna117 kernel: crefi.py        D ffff92f005e16eb0     0 18471      1 0x00000084
Apr 11 07:31:26 magna117 kernel: Call Trace:
Apr 11 07:31:26 magna117 kernel: [<ffffffffaa312f49>] schedule+0x29/0x70
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a394e5>] __fuse_request_send+0xf5/0x2e0 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9cbbe20>] ? wake_up_atomic_t+0x30/0x30
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a396e2>] fuse_request_send+0x12/0x20 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a3eb0a>] fuse_do_getattr+0x10a/0x2d0 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a3fc25>] fuse_update_attributes+0x75/0x80 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffc0a3fc73>] fuse_getattr+0x43/0x50 [fuse]
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e20649>] vfs_getattr+0x49/0x80
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e20775>] vfs_fstatat+0x75/0xc0
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e20cce>] SYSC_newstat+0x2e/0x60
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e1ad78>] ? vfs_write+0x168/0x1f0
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9d2f3d6>] ? __audit_syscall_exit+0x1e6/0x280
Apr 11 07:31:26 magna117 kernel: [<ffffffffa9e20fae>] SyS_newstat+0xe/0x10
Apr 11 07:31:26 magna117 kernel: [<ffffffffaa31f7d5>] system_call_fastpath+0x1c/0x21
Apr 11 07:33:26 magna117 kernel: INFO: task crefi.py:16811 blocked for more than 120 seconds.
Apr 11 07:33:26 magna117 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 11 07:33:26 magna117 kernel: crefi.py        D ffff92f01a752f70     0 16811      1 0x00000084


Version-Release number of selected component (if applicable):
12.2.4-6.el7cp

How reproducible:
1/3

Steps to Reproduce:
1. Ran crefi workload 
2. Manually upgrade MDS using steps in  https://github.com/ceph/ceph/pull/21263/files
3. After increasing max_mds to 2 at last step(as per link in above step), MDS was in starting state for long time.

Actual results:
Client IO failed with transport endpoint shutdown message

Expected results:
Client IO should not fail and Fuse service should not crash

Additional info:
NA