Holger Parplies wrote at about 22:49:28 +0200 on Sunday, October 19, 2008:
> Hi,
>
> Jeffrey J. Kosowsky wrote on 2008-10-19 14:58:15 -0400 [Re: [BackupPC-users]
> Incremental dumps hanging with 'Can't get?rsync digests' & 'Can't call
> method "isCached"']:
> > Nils Breunese (Lemonbit) wrote at about 19:50:35 +0200 on Sunday, October
> > 19, 2008:
> > > Jeffrey J. Kosowsky wrote:
> > > > When running an incremental backup on my Linux system, BackupPC
> > > > repeatedly hangs when backing up the mythconverg mysql database for
> > > > mythtv.
> > > > [...]
> > > > Can't get rsync digests from
> > > > /var/lib/BackupPC/pc/consult/3/f%2f/fvar/flib/fmysql/fmythconverg/
> > > > frecord.MYD
> > > > (err=-2, name=var/lib/mysql/mythconverg/record.MYD)
> > > > Can't call method "isCached" on an undefined value at
> > > > /usr/share/BackupPC/lib/BackupPC/Xfer/RsyncFileIO.pm line 165.
>
> a quick glance at the code reveals nothing (to me). I'll have a closer look
> later.
>
> > > > The most disturbing thing to me is that BackupPC seems to be so
> > > > fragile in that if it encounters a problem, it seems to just hang
> > > > there (seemingly) forever without sending any error messages
>
> I'm sure Craig will happily accept your patch.
Sure... and I'm sorry if I was sounding too complaining/ungrateful here..
>
> > I imagine that either something (maybe the attrib file for that
> > directory?) was written correctly on the initial full backup (or was
> > later corrupted though not likely since I'm running RAID and the
> > backup is fresh). This then caused BackupPC to crash when it hit the
> > malformed part of the full backup.
>
> 2.) Did you run the script I recently posted [1] to check the attrib files?
> I'd like to think the time I spent coding it was not completely wasted.
> If we actually found corrupt attrib files, that would be a start to
> making BackupPC less "fragile", as you put it.
> A further sanity check I should probably add to the script is a test for
> the existance of files listed in the attrib file, but that's not as
> simple
> as it sounds, because they may be in a preceeding backup of lower level
> rather than the same one the attrib file is in. Which makes me wonder:
> could the "backups" file be corrupted rather than an attrib file?
>
Hmmm... I am new to this list and was not aware of your script.
Unfortunately, I deleted the bad backup so I can't test the attrib
file but for sure I will next time I have such issues.
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