From owner-freebsd-stable  Fri Feb 15  9:11:17 2002
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Date: Fri, 15 Feb 2002 12:11:03 -0500 (EST)
From: Mikhail Teterin <mi@aldan.algebra.com>
Subject: a multhreaded application hanging
To: freebsd-stable@FreeBSD.org
Cc: questions@FreeBSD.org
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Hi!

I'm trying to port a multithreaded C++ application (using the sendmail's
milter library).

It seems to work most of the time, but every once in a while hangs in
the following line:

	size=read(pipe_io[1][0],iobuff,1024);

I tried to ktrace it when it gets into this state, and ktrace.out
remains empty. The process is in the ``piperd'' state, as reported
by ps. Why would read(2) be hanging?

The OS is 4.5-STABLE and I already recompiled the libc_r with the
not-yet-MFCed patches to uthread_attr_setscope.c and uthread_dup2.c
but that did not change a thing...

Thanks!

	-mi


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