Hi all:

I am trying to back up one of my system and it has been hanging and
exiting on sig ALRM for the past 6 days. The last working backup was
on 2011-03-22 @ 22:00:33.

If I run:

   sudo -u backup /tools/BackupPC/bin/BackupPC_dump -f -vv host

I get a bunch of output (the share being backed up /etc on a centos
5.5. box) which ends with:

  attribSet: dir=f%2fetc exists
  attribSet(dir=f%2fetc, file=zshrc, size=640, placeholder=1)
  Starting file 0 (.), blkCnt=134217728, blkSize=131072, remainder=0
  .: size doesn't match (12288 vs 17592185913344)

and that's the end of that. I have had similar hanging issues before
but usully scheduling a full backup or removing a prior backup or two
in the chain will let things work again. However I would like to
actually get this fixed this time around as it seems to be occurring
more often recently (on different backuppc servers and against
different hosts).

If I dump the root attrib file (where /etc starts) for either last
successful or the current (partial) failing backup I see:

  '/etc' => {
    'uid' => 0,
    'mtime' => 1300766985,
    'mode' => 16877,
    'size' => 12288,
    'sizeDiv4GB' => 0,
    'type' => 5,
    'gid' => 0,
    'sizeMod4GB' => 12288
  },

so there's the 12288. Multiplying the blkCnt by the blkSize is
17592186044416 so a little larger. ls -lasd on /etc on the host being
backed up shows:

  16 drwxr-xr-x 97 root root 12288 Mar 31 14:54 /etc

I am using

  $Conf{RsyncClientCmd} = '$sshPath -q -x -l backup -o
     ServerAliveInterval=30 $host sudo /usr/bin/strace -o
     /var/tmp/strace.rsync.$$ -f -tt -T -s 64 $rsyncPath $argList+';

as the remote command and the last few lines of strace show:

  19368 14:59:38.204943 write(1,
    "\0\10\0\0\2\0\0\0\236\7\0\0\377\377\377\377"...,
    1580) = 1580 <0.000011>
  19368 14:59:38.204993 select(2, NULL, [1], [1], {60, 0}) = 1 (out [1],
    left {60, 0}) <0.000009>
  19368 14:59:38.205032 write(1, "\4\0\0\7\377\377\377\377", 8) = 8
    <0.000011>
  19368 14:59:38.205069 select(1, [0], [], NULL, {60, 0}) = 0 (Timeout)
    <59.994504>
  19368 15:00:38.199634 select(1, [0], [], NULL, {60, 0}) = 0 (Timeout)
    <59.994597>

So does anybody have any ideas what is happening here and how to solve
it? I am guessing something being interpreted wierdly in the rsync
data stream?

The rsync client reports:

   rsync version 2.6.9 protocol version 29 Copyright (C)
   1996-2006 by Andrew Tridgell, Wayne Davison, and others.
   <http://rsync.samba.org/>
   Capabilities: 64-bit files, socketpairs, hard links, symlinks, batchfiles,
                 inplace, IPv6, 64-bit system inums, 64-bit internal inums

with uname -a reporting:

  Linux host 2.6.18-194.17.1.el5 #1 SMP Wed Sep 29 12:50:31 EDT 2010
     x86_64 x86_64 x86_64 GNU/Linux

-- 
                                -- rouilj

John Rouillard       System Administrator
Renesys Corporation  603-244-9084 (cell)  603-643-9300 x 111

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