[ic] IC + RedHat 7.x + Apache 1.3 = Segmentation fault?

[Dan Browning]

At 01:07 PM 5/16/2002 -0700, you wrote:
>Hi all -
>
>As a result of my consulting business I have access to may servers, and 
>I've noticed a condition that appears in varying degrees on just about any 
>machine that is running RH 7.x or a similar flavor of *nix, Apache 1.3x 
>and Just about any Interchange version. The apache error_log on said 
>machine contains entries like this:
>
>[Sun Sep 23 09:45:22 2001] [notice] child pid 6913 exit signal 
>Segmentation fault (11)
>[Thu Sep 27 13:58:00 2001] [notice] child pid 7236 exit signal 
>Segmentation fault (11)
>
>Frequency may be once a month, once a day or once every ten minutes - it 
>seems to depend upon how may IC daemons are running on the server (all 
>other things being equal, more daemons = more frequent segfaults).
>
>There is no discernable performance impact or other undesirable 
>manifestation that I can detect, other than the error_log being larger 
>than it would otherwise. I tried to compare the error_log entries to those 
>in access_log and the system messages log, but have not found any pattern 
>of correspondence.
>
>Because the properties of sampled severs do vary, the only thing I can say 
>with reasonable certainty is that I've only seen this on machines running 
>Interchange - spot checks of a few that don't show no such error_log entries.
>
>Can anyone comment on this. At first glance, lack of physical RAM was 
>highly suspect, but so far tests with greatly increasing RAM and greatly 
>reducing apache MaxClients has only freed up memory - frequency of the 
>annoying error_log entries has not dimished. I have not yet played with IC 
>server settings, but FWIW, in most cases it is running n low traffic mode 
>with the default settings for the same. IC version varies widely.
>
>TIA for comments,
>
>
>Ed L.

I was surprised to find the same thing in one of our dual-cpu production 
boxes, but not on any of the single cpu boxes:

[Tue Jan 15 23:42:44 2002] [notice] child pid 15951 exit signal 
Segmentation fault (11)
[Tue Mar  5 13:56:45 2002] [notice] child pid 30442 exit signal 
Segmentation fault (11)
[Tue Apr  2 13:27:28 2002] [notice] child pid 23420 exit signal 
Segmentation fault (11)
[Sun Apr 14 14:26:17 2002] [notice] child pid 13956 exit signal 
Segmentation fault (11)
[Tue Apr 30 07:51:21 2002] [notice] child pid 4542 exit signal Segmentation 
fault (11)

My observations are the same.  Would anyone else care to pipe in with some 
data from their error_log?


+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Dan Browning, Kavod Technologies <db@kavod.com>
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"You can't survive by sucking the juice from a wet mitten."
                 -- Charles Schulz, "Things I've Had to Learn Over and
                    Over and Over"