Hang with 1.5.18, 1.5.19 snapshot 20051029

[Volker Quetschke]

Hi!

Peter Rehley wrote:
> I have a problem where a configure script is hanging.  I first saw  the 
> behavior in 1.5.18, and it's still there in the latest snapshot.  The 
> only machines that we are seeing it hang on are windows 2000  machines, 
> sp4, with duel pentinum 933 mhz processors, and using ssh  to login to 
> the machine.  I haven't been able to reproduce the  problem on single 
> processor machines or when ssh is not used.
> 
> Under 1.5.18, the hang occurred about 1 in ten times in the  
> test_configure script (provided in the bash_test.tar.bz2 file.  Under  
> the latest snapshot it's about 1 in 900.
> 
> When the hang happens it appears that a process is completed, but  still 
> can be found in the process directory.  The cmdline file says  
> <defunct>, but the process still shows up in the process list (ps - 
> ef).  If I try to clean up by killing the process, the kill command  
> says that the process doesn't exist.  The only way that I can make  the 
> hung process go away is by using the task manager to kill the  process.

Your symptoms look familiar to our OOo build hang. I'm curious if in
your case a:

$ ls /proc/<hangpid>/fd

also cures the hang. (Sometimes this has to be issued several times.)

Volker

> 
> The simplest test I've gotten down to is:
> 
> ### Simple Test
> #! /bin/sh
> # Guess values for system-dependent variables and create Makefiles.
> # Generated by GNU Autoconf 2.59 for expr-configure 1.5.11-1.
> #
> # Report bugs to <cygwin at cygwin dot com>.
> #
> # Copyright (C) 2003 Free Software Foundation, Inc.
> # This configure script is free software; the Free Software Foundation
> # gives unlimited permission to copy, distribute and modify it.
> ## --------------------- ##
> ## M4sh Initialization.  ##
> ## --------------------- ##
> 
> set -xv
> 
> count=0
> while [ ! -f stop ] ; do
>   as_var=LC_MONETARY
>   if (test -z "`(eval $as_var=C; export $as_var; echo ho) 2>&1`"); then
>     echo "hi"
>     eval $as_var=C; export $as_var
>   fi
>   count=`expr $count + 1`
>   echo $count
> done
> ### End simple test
> 
> Someplace in the eval line the hang occurs.  Unfortunately I haven't  
> had success when using strace.
> 
> If I've missed anything or there are questions about the above,  please 
> let me know.
> Peter
> 
> 
> 
> 
> 
> 
>  
> 
> 
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