- Minor
I wonder if anyone else is having this issue?
I have several Ubuntu VM's mounting my primary share from the UnRAID pool via SMB.
One of them in particular which runs qBitTorrent has high writes (up to approx 100MB/s). Since upgrading to the 6.9.0 build (from 6.8.3) the speed is constantly dropping as smbd appears to panic which loses connection.
From my Ubuntu VM I can see smbd loses connection and blocks the app for 2 minutes
[18358.622226] cifs_vfs_err: 23 callbacks suppressed
[18358.622229] CIFS VFS: Server tower has not responded in 180 seconds. Reconnecting...
[18363.876639] CIFS VFS: Free previous auth_key.response = 00000000ee7c66f6
[18367.456112] INFO: task qbittorrent-nox:16780 blocked for more than 120 seconds.
When this occurs, I see the below errors on UnRAID in the SMB logs
[2020/06/30 18:16:34.725129, 0] ../../source3/smbd/close.c:648(assert_no_pending_aio)
assert_no_pending_aio: fsp->num_aio_requests=1
[2020/06/30 18:16:34.725152, 0] ../../source3/lib/util.c:829(smb_panic_s3)
PANIC (pid 28606): can not close with outstanding aio requests
[2020/06/30 18:16:34.725236, 0] ../../lib/util/fault.c:222(log_stack_trace)
BACKTRACE:
#0 log_stack_trace + 0x39 [ip=0x14abc3605e39] [sp=0x7fffb7a7f030]
#1 smb_panic_s3 + 0x23 [ip=0x14abc3127f73] [sp=0x7fffb7a7f970]
#2 smb_panic + 0x2f [ip=0x14abc360604f] [sp=0x7fffb7a7f990]
#3 create_file_default + 0x71f [ip=0x14abc34361cf] [sp=0x7fffb7a7faa0]
#4 close_file + 0xc3 [ip=0x14abc3436b53] [sp=0x7fffb7a7fab0]
#5 file_close_user + 0x35 [ip=0x14abc33dc485] [sp=0x7fffb7a7fcd0]
#6 smbXsrv_session_logoff + 0x4d [ip=0x14abc347dfdd] [sp=0x7fffb7a7fcf0]
#7 smbXsrv_session_logoff + 0x3e2 [ip=0x14abc347e372] [sp=0x7fffb7a7fd40]
#8 dbwrap_unmarshall + 0x186 [ip=0x14abc21606b6] [sp=0x7fffb7a7fd60]
#9 dbwrap_unmarshall + 0x3bb [ip=0x14abc21608eb] [sp=0x7fffb7a7fe20]
#10 dbwrap_traverse + 0x7 [ip=0x14abc215ef37] [sp=0x7fffb7a7fe50]
#11 smbXsrv_session_logoff_all + 0x5c [ip=0x14abc347e52c] [sp=0x7fffb7a7fe60]
#12 smbXsrv_open_cleanup + 0x4d2 [ip=0x14abc3483ab2] [sp=0x7fffb7a7fea0]
#13 smbd_exit_server_cleanly + 0x10 [ip=0x14abc3484050] [sp=0x7fffb7a7ff00]
#14 exit_server_cleanly + 0x14 [ip=0x14abc2a44284] [sp=0x7fffb7a7ff10]
#15 smbd_server_connection_terminate_ex + 0x111 [ip=0x14abc345fe91] [sp=0x7fffb7a7ff20]
#16 smbd_smb2_request_dispatch_immediate + 0x569 [ip=0x14abc3462ca9] [sp=0x7fffb7a7ff50]
#17 tevent_common_invoke_fd_handler + 0x7d [ip=0x14abc29f070d] [sp=0x7fffb7a7ffc0]
#18 tevent_wakeup_recv + 0x1097 [ip=0x14abc29f6a77] [sp=0x7fffb7a7fff0]
#19 tevent_cleanup_pending_signal_handlers + 0xb7 [ip=0x14abc29f4c07] [sp=0x7fffb7a80050]
#20 _tevent_loop_once + 0x94 [ip=0x14abc29efdf4] [sp=0x7fffb7a80070]
#21 tevent_common_loop_wait + 0x1b [ip=0x14abc29f009b] [sp=0x7fffb7a800a0]
#22 tevent_cleanup_pending_signal_handlers + 0x57 [ip=0x14abc29f4ba7] [sp=0x7fffb7a800c0]
#23 smbd_process + 0x7a7 [ip=0x14abc34522f7] [sp=0x7fffb7a800e0]
#24 samba_tevent_glib_glue_create + 0x2291 [ip=0x563fff42feb1] [sp=0x7fffb7a80170]
#25 tevent_common_invoke_fd_handler + 0x7d [ip=0x14abc29f070d] [sp=0x7fffb7a80240]
#26 tevent_wakeup_recv + 0x1097 [ip=0x14abc29f6a77] [sp=0x7fffb7a80270]
#27 tevent_cleanup_pending_signal_handlers + 0xb7 [ip=0x14abc29f4c07] [sp=0x7fffb7a802d0]
#28 _tevent_loop_once + 0x94 [ip=0x14abc29efdf4] [sp=0x7fffb7a802f0]
#29 tevent_common_loop_wait + 0x1b [ip=0x14abc29f009b] [sp=0x7fffb7a80320]
#30 tevent_cleanup_pending_signal_handlers + 0x57 [ip=0x14abc29f4ba7] [sp=0x7fffb7a80340]
#31 main + 0x1b2f [ip=0x563fff429c1f] [sp=0x7fffb7a80360]
#32 __libc_start_main + 0xeb [ip=0x14abc2700e5b] [sp=0x7fffb7a80710]
#33 _start + 0x2a [ip=0x563fff429ffa] [sp=0x7fffb7a807d0]
I have tried adjusting my mount command to smb3 and also to disable cache but still the same, heres my /etc/fstab
//tower/share /mnt/share cifs vers=3.0,cache=none,credentials=/home/user/.smbcredentials,uid=1000,gid=1010,iocharset=utf8,noperm 0 0 //tower/plexmediaserver /mnt/plexmediaserver cifs vers=3.0,cache=none,credentials=/home/user/.smbcredentials,uid=1000,gid=1010,iocharset=utf8,noperm 0 0