rsync - Sep 2008 - DO NOT REPLY [Bug 2957] rsync hangs when client put files to server (checked in 2.6.6 too)

https://bugzilla.samba.org/show_bug.cgi?id=2957


namegduf@tellaerad.net changed:

           What    |Removed                     |Added
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                 CC|                            |namegduf@tellaerad.net




------- Comment #25 from namegduf@tellaerad.net  2008-09-07 19:51 CST -------
I believe I have this bug occurring between two particular Linux systems over
SSH, pushing the backup, the client running 3.0.3, and the server running
2.6.9. The client performs much of the backup, then proceeds to hang
completely.

An strace in the client ends with the following:

select(5, NULL, [4], [4], {60, 0})      = 1 (out [4], left {60, 0})
write(4,
"\252{\5\204\361\300\371I?\202\25\322\370\355t#\301\375\222\303O\220\357\251\301<S?\360<\364\312"...,
2295) = 2295
select(5, NULL, [4], [4], {60, 0})      = 1 (out [4], left {60, 0})
write(4, "\377\377\377\377", 4)         = 4
select(6, [5], [], NULL, {60, 0})       = 0 (Timeout)
select(6, [5], [], NULL, {60, 0})       = 0 (Timeout)
select(6, [5], [], NULL, {60, 0})       = 0 (Timeout)
select(6, [5], [], NULL, {60, 0})       = 0 (Timeout)
select(6, [5], [], NULL, {60, 0} <unfinished ...>

Is there anything I can do to assist in tracking down this bug? It's quite
the
irritant as it breaks my backup scripts for that server.


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https://bugzilla.samba.org/show_bug.cgi?id=2957





------- Comment #26 from matt@mattmccutchen.net  2008-09-07 20:14 CST -------
John, it would be helpful to have a stack trace and strace for each of the
three processes (sender, generator, and receiver).


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------- Comment #27 from namegduf@tellaerad.net  2008-09-07 23:06 CST -------
I wasn't able to get a stack trace, as none of the rsync processes were
compiled with debugging information, except the client, which lacked gdb (or an
easy method of installing it).

However, I have straces for each. The client is from startup, and the two
server processes had strace attached as quickly as possible after startup, at
roughly the same time.

Client: http://fudgeman.org/pub/strace.log
Parent process on server: http://fudgeman.org/pub/strace-parent.log
Child process on server: http://fudgeman.org/pub/strace-child.log

The server-side errors were after the client was terminated, after it hung.


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