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Solaris x86 - Webstack 1.5 - Apache Stops reponding

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Operating Systems Solaris Solaris x86 - Webstack 1.5 - Apache Stops reponding
# 1  
Old 12-06-2011
Solaris x86 - Webstack 1.5 - Apache Stops reponding
Solaris 10x86 running multiple zones
Webstack 1.5 loaded in the global and one zone is using the Apache webserver which it provides.

Rest of zones working fine, no issues etc...

The Apache web server however just stops responding. It is still running, but not processing requests. There are no errors, nothing in the logs for the webserver or in the zone's system logs indicating any issues.

I wrote a simple script to check to see if the apache server is responding and have it restart the server if not, but I really need to find out how/why this is happening and if I can't fix it, move to something else that can do the same job in the same platform.

Anyone have similar issues in the past or have suggestions on what I can look for.

The previous server which was quite old used an very old Xampp system and with pretty much the same configuration (and zones) without these issues.
# 2  
Old 12-06-2011
Run
Code:
truss -p PID_of_hanged_apache

to see what the apache is really doing when it stops responding.
# 3  
Old 12-06-2011
Unfortunately, truss isn't showing anything. Even when running a bunch of connections all you ever see is:

Code:
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000) (sleeping...)
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0
pollsys(0x08047B70, 0, 0x08047BC0, 0x00000000)  = 0
waitid(P_ALL, 0, 0x08047AF0, WEXITED|WTRAPPED|WSTOPPED|WNOHANG) = 0

It finally stopped responding but the truss output kept up the same until I killed it.
# 4  
Old 12-06-2011
Normally apache is spawning few httpd processes. Are you sure that you were watching the correct one?
# 5  
Old 12-06-2011
Well... I did it with the master httpd process, not any of the slaves. however when this stops working, all of them appear to stop.

In the case below... it would be PID # 16818

Code:
    root 16818  1812   0 11:55:26 ?           0:02 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 10266 16818   0 12:41:57 ?           0:01 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 16824 16818   0 11:55:27 ?           0:03 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 15546 16818   0 13:54:31 ?           0:00 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 25006 16818   0 16:39:57 ?           0:00 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 16752 16818   0 13:57:05 ?           0:02 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 21414 16818   0 12:05:14 ?           0:02 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 16823 16818   0 11:55:27 ?           0:08 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 16573 16818   0 16:11:18 ?           0:00 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody  7354 16818   0 13:38:35 ?           0:01 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h
  nobody 20644 16818   0 12:03:27 ?           0:13 /opt/webstack/apache2/2.2/bin/httpd -D 32bit -f /etc/opt/webstack/apache2/2.2/h

---------- Post updated at 05:10 PM ---------- Previous update was at 04:52 PM ----------

Think I found my problem. Found an article that describes exactly what I am experiencing...

---------- Post updated at 05:12 PM ---------- Previous update was at 05:10 PM ----------

I would have posted the link to it, but the forum says I can't do that until I have posted at least 5 posts...

The following is the link.. there is no www in front of it.

sysadminsjourney.com/content/2009/09/01/apache-2212-2213-and-solaris-10-bug-nastiness
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