Re: Amanda TCP Reset Problem with CygWin
2003-03-31 11:59:35
Brian White wrote:
>
> > use configure with --pid-debug-files if you want and
> > look at sendbackup.debug and runtar.debug (or something like these).
>
> Hmmm... I have debug files in /tmp/amanda/. This creates more of them?
>
This creates a log file name with pid extention. In test phase you can
see how many times a process runs...
> > Did you apply my gnu tar patch?
>
> No. Which patch was that? Too many things on the go, I'm afraid.
The incremental-patch you can find near the other. But it helps during
incremental backups (with read-errors like files/dirs without rights)
>
> > YES! I got it!
> > The problem is inside windows socket implementation.
> > Nothing to be done:
>
> Ahh... The dreaded "closing a socket doesn't delay until all data has been
> sent and ACK'd problem"? Is that it? I'm familiar with that because it
> was a problem within the TCP/IP stack I wrote for our own products. :-)
>
Yep, I think so.
> > You have to apply my patch to server's dumper.c also.
> > I forgot to add this step in the documentation. Sorry.
>
> Eeek! Any other alternatives? I'd prefer to avoid changing the source
> code on the servers.
So I...
>
> > Look at my earlier post:
> > http://www.cygwin.com/ml/cygwin/2001-12/msg00524.html (that solution was
> > not right!)
>
> Why did a pause at the end of the process not work? Or did it just not
> work reliably?
>
I don't remeber well, but I think the windows "close socket" does not
send a "goodbye" nessage... never...
Or it goes lost:
+ /* A bug in the Windows TCP/IP implementation, which is not
+ yet worked around in Cygwin (such a workaround is very
+ difficult), causes the goodbye message to be lost if the
+ process sending it exits before it's read by the other
+ end. Since this message doesn't contain any useful
+ information anyway, it is safe for us to just not read it
+ to avoid this problem. */
Try adding a sleep _before_ the close call in aclose define (amanda.h)
and let me know.
> > Here you have the dumper.c patch extracted from amanda-2.4.2p2.patch.
> >
> > A cup of coffe to me, please :)
>
> Sure thing. I've sent it FedEx to you. I didn't have any lids, though...
> I hope that's okay.
:)
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