rsync - Jul 2012 - rsync hanging after working reliably for years on one of my shares

Howdy all,

I'm using rsync in conjunction with backuppc and have been backing up this
share without incident for almost 3 years and it has decided to go and hang on
me. Other shares on the same machine sync fine with identical settings, and
nothing has changed on the backup end other than some routine dist-upgrades to
keep update on security patches. I checked the apt cache and no rsync related
dpkgs seemed to be hanging around in there so...

Checked files with recent ctimes and mtimes, nothing funny looking there like
recursive links.

Log excerpt attached beneath. I think alphabetically xmlrpc.php may be the last
file in the share, is it coincidence it hangs right after? Thoughts? Ideas?
Unfounded speculation? Blatant slander?  Anything? Just about out of ideas on my
end. I've got a dozen or so other hosts that are happily syncing away and
passing all their unit tests but this one has greeted me the last 5 or 6 days
with a sad face and I don't seem to be making any progress. Any ideas at
all? Again, log snippet underneath. Let me know if this is a backuppc issue and
I am barking up the wrong tree, but there is definitely an rsync process sitting
out there indefinitely long.

--Rob

<snippet>
pollChild(0)
/var/lib/backuppc/pc/luna.aha/900/f%2fvar%2fwww/fwww.athenshousing.org/fxmlrpc.php
cache = , invalid = , phase = 0
Sending csums for www.athenshousing.org/xmlrpc.php (size=294)
pollChild(0)
Sending: acf531d26f1c50f1366757a80100d5d75332c5e7e75a6d<snip, about 1k of
data>
Sending csums, cnt = 0, phase = 1
pollChild()
<!-- this is where it just gets stuck until I kill it -->
Parent read EOF from child: fatal error!
Done: 0 files, 0 bytes
exiting after signal INT
dump failed: aborted by user (signal=INT)
link luna.aha
</snippet>


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On Fri, Jul 13, 2012 at 1:21 PM, Rob J. Caskey <rcaskey at
athenshousing.org>wrote:
>  Howdy all,****
>
> ** **
>
> I?m using rsync in conjunction with backuppc and have been backing up this
> share without incident for almost 3 years and it has decided to go and hang
> on me. Other shares on the same machine sync fine with identical settings,
> and nothing has changed on the backup end other than some routine
> dist-upgrades to keep update on security patches. I checked the apt cache
> and no rsync related dpkgs seemed to be hanging around in there so?
>
I'd probably try an strace of a stuck rsync or similar:
http://stromberg.dnsalias.org/~strombrg/debugging-with-syscall-tracers.html
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