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From "Zaccone, Warren" <wzacc...@telcordia.com>
Subject RE: [users@httpd] need some thoughts on trouble shooting httpd server hangup
Date Thu, 16 Jun 2011 15:30:35 GMT
I ran -S and it showed that I have port :443 only in addition to 80. It is a simple setup.
 99% of load is on port 80.
server-status is not revealing anything,. it shows the last requests that were successful.

It appears that the httpd root process is no longer responding yet is running.

 When you say it could be lots of things. Please let me know some ideas to try.

   Could it be a configure/build issue or related to operating system patches?  (I built Apache
2.2.15 on Solaris 10).

thank you.


From: Jeroen Geilman [mailto:jeroen@adaptr.nl]
Sent: Friday, June 03, 2011 6:48 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] need some thoughts on trouble shooting httpd server hangup

On 06/03/2011 10:12 PM, Zaccone, Warren wrote:
Have a problem where httpd server 2.2.15 stops responding to requests requiring server to
be frequently restarted that has me going in circles. I was looking for some direction as
to how to pursue.

there are 8 workers running each consuming very little cpu.     netstat shows process listening
on port 80 and 443.

requests on 443 are served fine, but requests on 80 hang,  Backed out 2.2.15 and went to previous
release I had built (httpd 2.2.11) and problem has gone away.  No other variables changed,
and they were built same way, so I am wondering if there was a change in behavior between
the releases that I have not anticipated or if there is a bug that may have been fixed subsequently.
  I am testing 2.2.19 in my lab without issues, but 2.2.15 is in production so I need to determine
the cause.

the requests are 99% php scripts with a fair number using web services with nusoap.  However
I think the issue may be httpd itself because port 443 works fine, but port 80 does not respond.
 Initially both ports are functioning and over time, (a few hours), requests on port 80 (http)
stop responding but 443 (https) remains fine. restarting httpd fixes it for a few hours.

I appreciate any thoughts or direction.
thank you.
Warren

It can depend on many things.

Are you running PHP scripts on 443 as well ? The same scripts ?

Or are you running way more on port 80, how much traffic is each port serving ?

Examine server-status output thoroughly when this start to happen.




I compiled it as

  Apache/2.2.15 (Unix) PHP/5.2.14 mod_ssl/2.2.15 OpenSSL/0.9.8o

   apachectl -V
apache bin directory is /usr/local/apache/bin
httpd is /usr/local/apache/bin/httpd
Server version: Apache/2.2.15 (Unix)
Server built:   Jul 22 2010 16:52:18
Server loaded:  APR 1.3.3, APR-Util 1.3.4
Compiled using: APR 1.3.3, APR-Util 1.3.4
Architecture:   32-bit
Server MPM:     Prefork
  threaded:     no
    forked:     yes (variable process count)
Server compiled with....
 -D APACHE_MPM_DIR="server/mpm/prefork"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_FCNTL_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=128
 -D HTTPD_ROOT="/usr/local/apache"
 -D SUEXEC_BIN="/usr/local/apache/bin/suexec"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_LOCKFILE="logs/accept.lock"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"
$

A lot more helpful would be the output from httpd -S, and an indication of the types of content
on each port.

Also , try to reproduce it by running ab or something like it, keeping an eye on extendedstatus.




--

J.

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