Messages in this thread | | | Date | Mon, 03 Feb 2003 15:23:17 +0100 | From | Franz Sirl <> | Subject | Re: [TEST FIX] Re: SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, |
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On 2003-02-02 15:40:33 Bill Davidsen wrote: >On Wed, 29 Jan 2003, David C Niemi wrote: > > > > > On Tue, 28 Jan 2003, David S. Miller wrote: > > > From: kuznet@ms2.inr.ac.ru > > > Date: Wed, 29 Jan 2003 02:56:41 +0300 (MSK) > > > > > > Hey! Interesting thing has just happened, it is the first time when I > > > found the bug formulating a senstence while writing e-mail not while > > > peering to code. :-) > > > > > > Congratulations :-) > > > > Just to confirm, this fix works for me as well. > > > > ... > > > Indeed, this bug exists in 2.4 as well of course. > > > > > > This bug is 2.4.3 vintage :-) It got added as part of initial > > > zerocopy merge in fact. > > > > Odd, then, that it I was unable to reproduce the SSH hangs under 2.4.18 > > even once, despite heavily using it for several days under the same > > circumstances. Is there any reason 2.4.x would be better able to > recover? > > 2.5.59 with the fix seems to feel a bit less balky than 2.4.18 without the > > fix, so it seemed to me that 2.4.18 had some way of recovering at the cost > > of a several second pause in the session. > >The problem which I have been seeing with some regularity is not the hang >you describe (I see that infrequently) but rather a hang after I exit an >ssh connection. I open several dozen windows at a time to a cluster when I >do admin, and when I close almost always at least one doesn't drop without >"~." to help. So far in a hour I haven't seen that.
That's some internal problem in OpenSSH, can be seen on Solaris as well. Can be easily reproduced in a ssh session:
nohup sleep 60 & logout
The ssh session will terminate only after the sleep exited.
Franz.
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