From nobody@hyperreal.org  Mon Jul  7 11:44:39 1997
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Date: Mon, 7 Jul 1997 11:44:39 -0700 (PDT)
From: Alex Lau <kclau@www.nsysu.edu.tw>
Reply-To: kclau@www.nsysu.edu.tw
To: apbugs@hyperreal.org
Subject: sending a kill -HUP to httpd will cause it down.
X-Send-Pr-Version: 3.2

>Number:         832
>Category:       general
>Synopsis:       sending a kill -HUP to httpd will cause it down.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          closed
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Mon Jul  7 11:50:01 1997
>Last-Modified:  Sat Sep  6 17:06:19 PDT 1997
>Originator:     kclau@www.nsysu.edu.tw
>Organization:
>Release:        1.2.1
>Environment:
OS: Solaris 2.5.1  Compiler: gcc 2.7.2.1
Except the default setting in Configuration, uncomment the: referer_log_module,
expires_module, headers_module
uname -a produce "SunOS www 5.5.1 Generic_103640-08 sun4u sparc SUNW,Ultra-1"
>Description:
command:
        kill -HUP `cat httpd.pid`
result:
        bind: Invalid argument
        httpd: could not bind to port 80

After that, no more httpd processes exist.
Restart the httpd without problem (no bind problem)
>How-To-Repeat:

>Fix:

>Audit-Trail:
State-Changed-From-To: open-analyzed
State-Changed-By: marc
State-Changed-When: Mon Jul  7 11:53:30 PDT 1997
State-Changed-Why:
Yes, we discovered that problem under Solars the other
day.  It appears to be due to some obscene Solaris behavior.
A temporary workaround is to add -DNO_SLACK to the
EXTRA_CFLAGS line in Configuration, rerun Configure
and recompile.  We are thinking about the best way to
deal with this.
Comment-Added-By: marc
Comment-Added-When: Wed Jul  9 07:39:05 PDT 1997
Comment-Added:
One other workaround is to use -USR1 instead of -HUP.
This does a graceful restart.  See the docs for details;
it is not applicable in all situations since it doesn't
immediately close the logfiles, but can be used in some.
Comment-Added-By: dgaudet
Comment-Added-When: Sun Jul 20 10:43:46 PDT 1997
Comment-Added:
We also have a patch available which fixes this bug without disabling
the new slack fd feature.  You can get it at

http://www.apache.org/dist/patches/apply_to_1.2.1/solaris_hup.patch

Dean

Comment-Added-By: dgaudet
Comment-Added-When: Mon Jul 28 11:47:57 PDT 1997
Comment-Added:
If you applied that last patch you should reverse it (use patch -R
or unpack apache_1.2.1 again and retrieve http_main.c).  Then
try applying the patch at:

http://www.apache.org/dist/patches/apply_to_1.2.1/solaris_dup.patch

(note the last one was called solaris_hup.patch).

Dean
State-Changed-From-To: analyzed-closed
State-Changed-By: marc
State-Changed-When: Sat Sep  6 17:06:19 PDT 1997
State-Changed-Why:
This problem is corrected in 1.2.4.
>Unformatted: