Sean Kamath kamath@moltingpenguin.com writes:
On Jan 30, 2013, at 3:46 PM, micah anderson micah@riseup.net wrote:
Seems that only the above process was still around and no other dsync processes. I have three machines that all have this happening it seems.
I wonder if there is a ssh configuration option I could set to make these die off.
If the ssh process isn't sending anything, and just waiting for read()s, and keepalives are turned off, the SSH session might never know the remote side is long gone. . .
This time I managed to capture a process that was stuck and look at it from the server side, and the client side:
on the server:
2000 19470 0.0 0.0 7512 3816 ? Ss Feb05 0:01 /usr/bin/dsync dsync-server -E -u foo # strace -s 1024 -F -p 19470 Process 19470 attached - interrupt to quit write(2, "dsync-remote(foo): Error: mdbox /srv/maildirbackups/foo/daily.1/storage: Duplicate GUID 96860517f68aa94f8b51000097f19f0b in m.41:682501 and m.37:653225\n", 167
on the client:
root 19001 0.0 0.0 41308 1600 ? S Feb05 0:00 ssh -i /root/.ssh/backmaildir_id_rsa backmaildir@hoopoe-pn /usr/bin/dsync -u foo server
# strace -s 1024 -F -p 19001 Process 19001 attached - interrupt to quit select(8, [4], [], NULL, NULL
interestingly, now that I've been watching this more, the same users keep getting wedged.
When I attempt to do a dsync of that user by hand, I get this:
dsync-local(foo): Error: Unexpected reply from server: 13 d2a100118c45d24f760f000097f19f0b 3561 128 \Recent 1353980259
I tried one of the other users that was stuck, and it gave me:
dsync-remote(bar): Error: Corrupted dbox file /srv/maildirbackups/bar/daily.1/storage/m.130 (around offset=22532): msg header has bad magic value
This looks like there is something corrupted with the dbox for the user on the client side, is there something I can do to repair those?
If any data were transmitted, it would discover the remote side is turned off.
One thing I am doing is using a ssh controlmaster socket, and if I kill the process on the client's side, the server side process also dies.
micah