[CentOS] tar bug in CentOS 4.6?

[Nicolas Sahlqvist]

On Jan 8, 2008 7:00 PM, David G. Miller <dave at davenjudy.org> wrote:

> Since upgrading my server from CentOS 4.5 to 4.6 I've been getting the
> following error from amanda backups:
>
> mutilate   /home lev 1 FAILED [compress got signal 11, /bin/tar got
> signal 13]
>
>
> I was away from the house for most of the end of December and had a
> couple of other issues that came up that could have been related but
> apparently weren't (why is it that several things all go wrong at
> once?).  After getting these other issues resolved I was still getting
> the above error.  I tried running the following command as root:
>
> /bin/tar -X /etc/amanda/exclude-list/exclude.txt -cvf - /home | gzip -v
> -c > /share/dave/Home.tar.gz
>
> Initially tar would die while attempting to back up one of IMAP folders
> that had quite a few fairly large e-mails (some pictures my brother had
> sent).  I removed the larger e-mails and tar proceeded past the IMAP
> folder that had been the problem only to die later:
>
> ...
> /home/judy/Judy's Stuff/School/
> /home/judy/Judy's Stuff/School/2007 Spring/
> /home/judy/Judy's Stuff/School/2007 Spring/Mynametemplate.ppt
> /home/judy/Judy's Stuff/School/2007 Spring/MyNameSamples.doc
> /home/judy/Judy's Stuff/School/2007 Spring/Myname105.ppt
> /home/judy/Judy's Stuff/School/2007 Spring/TYP Types.doc
> /home/judy/Judy's Stuff/School/2007 Spring/Photoshop_CS2.exe
> Segmentation fault
>
> The copy of PhotoShop is the trial version that my wife had downloaded
> about a year ago for a class she was taking.  This directory has been
> getting backed up at least every thirty days since then given my tape
> rotation.  If I remove the PhotoShop_CS2.exe file, the backup completes
> normally.
>
> So, is this a tar bug (doesn't like big files now) or is there some
> other issue like available shared memory that's causing the problem?
>
> Cheers,
> Dave
>
> --
> Politics, n. Strife of interests masquerading as a contest of principles.
> -- Ambrose Bierce
>
>
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Dave,

First you have to figure out if the problem occurs in tar or gzip, do you
get the problem if you tar and then gzip or is it combined (make a none
compressed tar archive), in case no is the pipe somehow the problem, same
crash with tar -z option rather then piping to gzip? Finally you need to get
a stack trace why you need to set the core size limit above the default 0
size with "ulimit -c unlimited" before running the command. You can now use
gdb to make a stack trace "gdb <path to exec file> <path to core file>" and
type where and type "where" in order to get a stack trace that you can
publish in a relevant forum for further examination by developers.


- Nicolas
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