Date: Fri, 4 Dec 1998 11:52:56 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: asami@cs.berkeley.edu (Satoshi Asami) Cc: current@FreeBSD.ORG Subject: Re: weird rsh hang Message-ID: <199812041952.LAA16925@apollo.backplane.com> References: <199812040954.BAA23296@silvia.hip.berkeley.edu>
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:Hi,
:
:I'm trying some parallel gzip's by trying a
:
: rsh mach1 cat file | gzip | rsh mach1 cat \> file.newname
:
:For some reason, this is turning up a large number of hung connections.
:..
:===
:
:I get about 10 of these for 1,500 connections over 3 machines. Any ideas?
:
:Satoshi
Try rsh mach1 -n cat file for the first rsh.
Is this with -current or with -stable? There was an old -stable
that had a bug with the tcp window scaling that would get into a
permanent blocking situation for window sizes of 65536 or greater,
but the bug was fixed months ago as far as I know. I'll check.
It also would not surprise me at all if a bug in rsh were found.
Track down why the 'base' rsh command is stuck in select... is it
waiting to read from the socket or to write to the pipe? It could
be waiting to read from stdin since you didn't use the -n option.
0 5391 5369 188 2 0 780 488 select I ?? 0:00.02 rsh m16 cat /usr/local/packa...
-Matt
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:
Matthew Dillon Engineering, HiWay Technologies, Inc. & BEST Internet
Communications & God knows what else.
<dillon@backplane.com> (Please include original email in any response)
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