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[Nbd] nbd-server hanging issue



Hello, list

I use the 2.8.4 server, and the -persist capable client.
Today, one of my nodes hangs, and i cannot kill the server!


[root@...83... root]# killall -KILL nbd-server
[root@...83... root]# ps fax | grep nbd
27330 pts/2    S      0:00          \_ grep nbd
17001 ?        D<   230:27 nbd-server 1230 /dev/md0 2097000
26959 ?        D<     0:00 nbd-server 1230 /dev/md0 2097000
[root@...83... root]# killall -KILL nbd-server
[root@...83... root]# killall -KILL nbd-server
[root@...83... root]# killall -KILL nbd-server
[root@...83... root]# killall -KILL nbd-server
[root@...83... root]# ps fax | grep nbd
27336 pts/2    S      0:00          \_ grep nbd
17001 ?        D<   230:27 nbd-server 1230 /dev/md0 2097000
26959 ?        D<     0:00 nbd-server 1230 /dev/md0 2097000
[root@...83... root]#

No dmesg message, just hang.
(I know this caused by some garbage from the network, but i cannot
reproduce...)

Cheers,
Janos




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