Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

On Wed, 4 Jun 2008, Håkon Løvdal wrote:

Hi. I have now tested and taken various logs before/under/after (ps,
netstat, tcpdump, strace, /proc/net/tcp). The logs did not grow as big
as I feared however they are way too big attach here. Any tips on how to
distribute?

Usually such logs compress quite well. A best thing might be to put
somewhere (if possible) and http:// reference them.

I mentioned before that the ssh connection died on the new PC, but
sometimes it just hangs as well, i.e. the ssh connection is alive but
there is no data transferred.
The last test I did hang after just 292MB transferred. In this case pv
just hangs on the new PC, waiting for data that never arrives. On the
sending side tar which is producing data have died and the corresponding
ssh is locked in some uninterruptible sleep:

//netstat before the hang:
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name Timer
tcp 0 504 new_pc:22 old_pc:39464
ESTABLISHED 17054/sshd: hlovdal on (0.20/0/0)

// after the hang:
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name Timer
tcp 0 2896 old_pc:22 new_pc:39464
ESTABLISHED - on (21329441.19/0/0)

??? Are these on the same machine? How come the ip-addresses got reversed
(while ports remain the same)...?!?

...Something could be corrupting more than a little, addresses, reference
to the process, timers all seem mixed up here...

Many things in /proc/17054/ are in a non-normal state (exe is an
empty symlink, fd is empty, etc)

...


--
i.

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