Justin W wrote:
> I've got a script I wrote up which backs up my computer using rsync. A
> short overview is that I created a file system image using dd, and now I
> mount the image and rsync from the server's HD to the image file.
>
> Periodically during large backups, I get the following error:
>
> rsync: connection unexpectedly closed (16931 bytes received so far)
> [sender]
> rsync error: error in rsync protocol data stream (code 12) at
> io.c(453) [sender=2.6.9]
>
> When I Google for the problem, I get many results about a SSH connection
> timing out because of inactivity during the delete stage, but I'm not
> using SSH, so I don't get why I would have this problem: both the source
> and destination are local.
>
> Any ideas on how to debug this would be great. I've thought of using
> strace, but it'd result in a huge file which would have to be sorted
> through (as rsync isn't technically crashing, rsync would continue with
> a shutdown procedure and the logging wouldn't stop right at the point of
> failure).
>
Actually, looking through my script, I had stuck an strace in there at
some point. I currently have a 165MB trace in my /tmp directory.
Here's the last few lines of it:
write(1, "usr/lib/locale/nb_NO/LC_IDENTIFI"..., 39) = 39
select(5, NULL, [4], [4], {60, 0}) = 1 (out [4], left {60, 0})
write(4, "\222\1\0\0", 4) = 4
read(3, "\31\21\3
\20\0\0\0H\0\0\0m\0\0\0\213\0\0\0\305\0\0\0\306"..., 402) = 402
select(5, NULL, [4], [4], {60, 0}) = 1 (out [4], left {60, 0})
write(4, "\31\21\3
\20\0\0\0H\0\0\0m\0\0\0\213\0\0\0\305\0\0\0\306"..., 402) = 402
select(5, NULL, [4], [4], {60, 0}) = 1 (out [4], left {60, 0})
write(4, "\0\0\0\0", 4) = 4
select(5, NULL, [4], [4], {60, 0}) = 1 (out [4], left {60, 0})
write(4, " \231\37\271<7(k\332\215\325q\220\343:\200", 16) = 16
close(3) = 0
select(6, [5], [], NULL, {60, 0}) = 1 (in [5], left {60, 0})
read(5, "", 4) = 0
write(2, "rsync: connection unexpectedly c"..., 76) = 76
write(2, "\n", 1) = 1
rt_sigaction(SIGUSR1, {SIG_IGN}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {SIG_IGN}, NULL, 8) = 0
wait4(8702, 0x7fff762db284, WNOHANG, NULL) = -1 ECHILD (No child
processes)
getpid() = 8701
kill(8702, SIGUSR1) = -1 ESRCH (No such process)
write(2, "rsync error: error in rsync prot"..., 86) = 86
write(2, "\n", 1) = 1
exit_group(12) = ?
> Attached is the backup script I use (the configuration file it loads in
> is very simple, so I'm not including that).
>
> Justin W
>
Justin W
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