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Date:      Fri, 4 Dec 1998 01:54:19 -0800 (PST)
From:      asami@cs.berkeley.edu (Satoshi Asami)
To:        current@FreeBSD.ORG
Subject:   weird rsh hang
Message-ID:  <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.

===
## ps gxwwl
  UID   PID  PPID CPU PRI NI   VSZ  RSS WCHAN  STAT  TT       TIME COMMAND
    :
    0   648     1 157   2  0  1272  648 select Ss    ??    2:19.74 /usr/local/sbin/sshd (sshd1)
    0  3357   648   1   2  0  1296  900 select S     ??    0:01.06 /usr/local/sbin/sshd (sshd1)
    0  4762     1 214  18  0   452  256 pause  Is    ??    0:00.04 csh -c /usr/local/packages/pcompress packages/All/asclock-1.0.tar
    0  4780  4762 212  10  0   496  188 wait   I     ??    0:00.01 /bin/sh /usr/local/packages/pcompress packages/All/asclock-1.0.tar
    0  4792  4780 178   2  0   780  488 select I     ??    0:00.02 rsh m16 cat /usr/local/packages/packages/All/asclock-1.0.tar
    0  4793  4780 173  -6  0   568  316 piperd I     ??    0:00.23 gzip -c --best
    0  4794  4780 177   2  0   780  516 select I     ??    0:00.02 rsh m16 cat > /usr/local/packages/packages/compressed/asclock-1.0.tgz
    0  4799  4792 214  81  0     0    0 -      Z     ??    0:00.00  (rsh)
    0  4801  4794 177  -6  0   780  516 piperd I     ??    0:00.00 rsh m16 cat > /usr/local/packages/packages/compressed/asclock-1.0.tgz
    0  5347     1 188  18  0   452  256 pause  Is    ??    0:00.04 csh -c /usr/local/packages/pcompress packages/All/cal-3.5.tar
    0  5369  5347 217  10  0   496  188 wait   I     ??    0:00.01 /bin/sh /usr/local/packages/pcompress packages/All/cal-3.5.tar
    0  5391  5369 188   2  0   780  488 select I     ??    0:00.02 rsh m16 cat /usr/local/packages/packages/All/cal-3.5.tar
    0  5392  5369 207  -6  0   568  320 piperd I     ??    0:00.16 gzip -c --best
    0  5393  5369 164   2  0   780  516 select I     ??    0:00.02 rsh m16 cat > /usr/local/packages/packages/compressed/cal-3.5.tgz
    0  5397  5391 218  82  0     0    0 -      Z     ??    0:00.00  (rsh)
    0  5401  5393 164  -6  0   780  516 piperd I     ??    0:00.00 rsh m16 cat > /usr/local/packages/packages/compressed/cal-3.5.tgz
    0  6634   635  91  10  0   176   36 nanslp S     ??    0:00.00 sleep 5
    0 23514   648   0   2  0  1280  908 select I     ??    0:00.85 /usr/local/sbin/sshd (sshd1)
    0 23756   648   0   2  0  1280  896 select I     ??    0:00.67 /usr/local/sbin/sshd (sshd1)
    0  3666  3633   0  10  0  1608 1004 wait   S     p0    0:01.08 bash
    :
===

I get about 10 of these for 1,500 connections over 3 machines.  Any ideas?

Satoshi

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