Re: Backup issues with OpenBSD 4.5 machines
2009-09-09 12:15:28
Hi Dustin - one question before I post on the OpenBSD list. In reviewing a post Stan made a couple weeks ago to the OpenBSD list, someone asked if Amanda uses pthreads. I noticed that ldd reports that the binaries link to libpthread. Does Amanda use pthreads, either directly or through some other library?
-- Michael
On Wed, Sep 9, 2009 at 7:31 AM, Dustin J. Mitchell <dustin AT zmanda DOT com> wrote:
On Tue, Sep 8, 2009 at 10:20 PM, Nathan Stratton
> At that time the discussion was focused on common-src/stream.c, which
> hadn't changed significantly between those versions, but it would be
> interesting to know if there were any changes in the sendbackup code
> path after 2.5.0p1 that seem like they might be related to this bug....
Sigh, that reaches way back into the CVS days and Jean-Louis' memory
-- he's not around right now. There were *bunches* of changes between
2.5.0 and 2.5.2, not least of which the introduction of the Backup API
(which became the Application API). If we could reproduce the
behavior in a test program, exploring the history might be a more
fruitful avenue for pursuit, since we'd know what to look for.
One thing we could do is remove all of the other patches and replace
the "fixing" fcntl() calls with something similar -- maybe just
sleep(1)? If this "fixes" the problem, then that's evidence this was
a race condition.
Alternately, remove all of the other patches and add:
1285 ptr = buffer;
1286 bytes_written = 0;
g_debug("fcntl(%d) => %d", fileno(pipe_fp), fcntl(fileno(pipe_fp),
F_GETFL, 0), O_NONBLOCK);
1287 just_written = full_write(fileno(pipe_fp), ptr, (size_t)bytes_read);
1288 if (just_written < (size_t)bytes_read) {
and try to trigger the same error. I suspect you'll find that the
fcntl is returning something with bit 2 (O_NONBLOCK) set.
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- Re: Backup issues with OpenBSD 4.5 machines, (continued)
- Re: Backup issues with OpenBSD 4.5 machines, Michael Burk
- Re: Backup issues with OpenBSD 4.5 machines, Nathan Stratton Treadway
- Re: Backup issues with OpenBSD 4.5 machines, Michael Burk
- Re: Backup issues with OpenBSD 4.5 machines, Nathan Stratton Treadway
- Re: Backup issues with OpenBSD 4.5 machines, Nathan Stratton Treadway
- Re: Backup issues with OpenBSD 4.5 machines, Michael Burk
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
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- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
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- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
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- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines,
Michael Burk <=
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Michael Burk
- Re: Backup issues with OpenBSD 4.5 machines, Michael Burk
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Nathan Stratton Treadway
- Re: Backup issues with OpenBSD 4.5 machines, Dustin J. Mitchell
- Re: Backup issues with OpenBSD 4.5 machines, Nathan Stratton Treadway
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