On Mon, 2008-10-13 at 21:19 +0800, Thomas Gutzler wrote:
> I'm using the following command to move files from a to b:
> rsync -avvvv --remove-source-files --ignore-existing /path/to/dir1/
> /path/to/dir2 >> logfile
> dir2 isn't empty so I only move files from dir1 to dir2 that don't exist
> already.
> Every so often rsync stops in the middle and doesn't continue with the
> result that I have to kill it.

> Any suggestions how to debug this so that I can find out what's going
> on? Unfortunately I haven't found a way to reproduce it. Every time I
> kill and execute the same command again, it works.

The next time rsync hangs, before you kill it, attach gdb to each of the
three rsync processes ("gdb /PATH/TO/rsync PID") and get a stack trace
("bt"). Wayne should have more suggestions for what information would
be helpful for debugging.

Matt

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On Fri, Oct 17, 2008 at 03:34:03PM +0800, Thomas Gutzler wrote:
> I had another rsync hang. I've attached a text file with the stack
> traces you asked for and some other info.

The generator backtrace shows that it is waiting for the receiver to
finish some files before going on. This attempts to sprinkle the source
removes more evenly during the transfer instead of having them all get
bunched up at the end. So, the strange thing is that the receiver is
waiting around for more files to process, which raises the question of
why the generator doesn't know that the files it initiated are all done
(or make me wonder if some pipe data didn't get delivered, but that is
less likely). Did your transfer report any errors?

...wayne..
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Wayne Davison wrote:
> On Fri, Oct 17, 2008 at 03:34:03PM +0800, Thomas Gutzler wrote:
>> I had another rsync hang. I've attached a text file with the stack
>> traces you asked for and some other info.
>
> [...] So, the strange thing is that the receiver is
> waiting around for more files to process, which raises the question of
> why the generator doesn't know that the files it initiated are all done
> (or make me wonder if some pipe data didn't get delivered, but that is
> less likely). Did your transfer report any errors?

No, there are no errors in the log file expect the one when I killed the
process.

I've just switched back to rsync version 2.6.9 - see if that works.
Happy to test/debug stuff, you just have to tell me what to do.

Tom
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