Hi guys,
We are recently testing rbd-nbd using ceph N version. After map rbd
image, mkfs and mount the nbd device, the rbd-nbd and dmesg will show
following errors when doing some read/write testing.
rbd-nbd log:
2021-05-18 11:35:08.034 7efdb8ff9700 20 []rbd-nbd: reader_entry:
waiting for nbd request
...
2021-05-18 11:35:08.066 7efdb8ff9700 -1 []rbd-nbd: failed to read nbd
request header: (33) Numerical argument out of domain
2021-05-18 11:35:08.066 7efdb3fff700 20 []rbd-nbd: writer_entry: no io
requests, terminating
2021-05-18 11:35:08.066 7efdea8d1a00 20 []librbd::ImageState:
0x564a2be2b3c0 unregister_update_watcher: handle=0
2021-05-18 11:35:08.066 7efdea8d1a00 20 []librbd::ImageState:
0x564a2be2b4b0 ImageUpdateWatchers::unregister_watcher: handle=0
2021-05-18 11:35:08.066 7efdea8d1a00 20 []librbd::ImageState:
0x564a2be2b4b0 ImageUpdateWatchers::unregister_watcher: completing
unregister
2021-05-18 11:35:08.066 7efdea8d1a00 10 []rbd-nbd: ~NBDServer: terminating
2021-05-18 11:35:08.066 7efdea8d1a00 20 []librbd::ImageState:
0x564a2be2b3c0 close
dmesg:
[Tue May 18 11:35:07 2021] EXT4-fs (nbd0): mounted filesystem with
ordered data mode. Opts: discard
[Tue May 18 11:35:07 2021] block nbd0: shutting down sockets
[Tue May 18 11:35:09 2021] blk_update_request: I/O error, dev nbd0,
sector 75592 op 0x0:(READ) flags 0x3000 phys_seg 1 prio class 0
client host info:
centos7.x
kernel 5.4.109
It looks like the kernel nbd device shutdown its socket for some
reason, but we haven't figured it out. BTW, we have tried to turn
on/off rbd cache, use different fs ext4/xfs, use ec pool or replicated
pool, but the error remains. It is more frequent for us to reproduce
when batch map, mkfs and mount rbd-nbd on different hosts
simultaneously.
Thanks for any suggestions.
Regards,
Zhi Zhang (David)
Contact: zhang.david2011@xxxxxxxxx
zhangz.david@xxxxxxxxxxx
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