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Re: [Bacula-devel] bacula-sd hanging after tape gets full + unload (2.5.19)


On Thu, 2008-11-13 at 18:03 +0200, Pasi Kärkkäinen wrote:
> Hello list!
> 
> I'm using Bacula 2.5.19 and trying 'copy jobs' feature to copy jobs from
> disk volumes/pools to tape.
> 
> Sometimes bacula-sd seems to get stuck.. it hangs without doing anything.
> Now it happened when tape got full and Bacula started to change the tape on
> the drive (using autoloader):
> 
> bacula-sd JobId 3082: Start Copying JobId 3082, Job=CopyPool4UncopiedToTape.2008-11-13_10.53.04.54
> bacula-sd JobId 3082: Using Device "IBM-LTO3-Drive"
> bacula-sd JobId 3082: Ready to read from volume "Pool4-Vol-0127" on device "FSDevice4" (/mnt/backup1/pool04).
> bacula-sd JobId 3082: Forward spacing Volume "Pool4-Vol-0127" to file:block 0:218.
> bacula-sd JobId 3082: End of Volume "756NNNL3" at 764:10067 on device "IBM-LTO3-Drive" (/dev/nst0). Write of 64512 bytes got -1.
> bacula-sd JobId 3082: Re-read of last block succeeded.
> bacula-sd JobId 3082: End of medium on Volume "756NNNL3" Bytes=725,237,130,240 Blocks=11,241,894 at 13-Nov-2008 11:51.
> bacula-sd JobId 3082: 3307 Issuing autochanger "unload slot 3, drive 0" command.
> 
> <nothing happens after this>
> 

I had exactly the same problem (2 times)

BR
Ulrich

> 
> *sta
> Status available for:
>      1: Director
>      2: Storage
>      3: Client
>      4: All
> Select daemon type for status (1-4): 2
> 
> ...
> 
> Device status:
> Autochanger "IBM-LTO3-AutoChanger" with devices:
>    "IBM-LTO3-Drive" (/dev/nst0)
> Device "FSDevice0" (/mnt/backup1/pool00) is not open.
> Device "FSDevice1" (/mnt/backup1/pool01) is not open.
> Device "FSDevice2" (/mnt/backup1/pool02) is not open.
> Device "FSDevice3" (/mnt/backup1/pool03) is not open.
> Device "FSDevice4" (/mnt/backup1/pool04) is mounted with:
>     Volume:      Pool4-Vol-0127
>     Pool:        Pool4
>     Media type:  File4
>     Total Bytes Read=1,649,507,328 Blocks Read=25,569 Bytes/block=64,512
>     Positioned at File=0 Block=1,649,507,534
> Device "IBM-LTO3-Drive" (/dev/nst0) is not open.
>     Device is being initialized.
>     Drive 0 is not loaded.
> ====
> 
> Used Volume status:
> 
> <hangs here and nothing happens>
> 
> 
> I can exit bconsole by pressing CTRL+C multiple times.. if I restart
> bconsole and run that again, it gets stuck again.. 
> 
> I tried 'strace -p <pid>' to see what bacula-sd is doing:
> 
> # strace -p 7339
> Process 7339 attached - interrupt to quit
> select(5, [4], NULL, NULL, NULL <unfinished ...>
> Process 7339 detached
> 
> So.. bacula-sd seems to be stuck on select() .. 
> 
> Running 'mtx' seems to work fine.. at the same time when bacula-sd is stuck.
> 
> # mtx -f /dev/sg3 status
>   Storage Changer /dev/sg3:1 Drives, 8 Slots ( 0 Import/Export )
> Data Transfer Element 0:Empty
>       Storage Element 1:Full :VolumeTag=179MMML3
>       Storage Element 2:Full :VolumeTag=658NNNL3
>       Storage Element 3:Full :VolumeTag=756NNNL3
>       Storage Element 4:Full :VolumeTag=177MMML3
>       Storage Element 5:Full :VolumeTag=655NNNL3
>       Storage Element 6:Full :VolumeTag=656NNNL3
>       Storage Element 7:Full :VolumeTag=657NNNL3
>       Storage Element 8:Full :VolumeTag=CLNU38L1
> 
> 
> Any ideas how to fix this? Other than restarting Bacula.. 
> 
> I don't see any IO errors in dmesg and/or messages.
> 
> -- Pasi
> 
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