Using with worker MPM, mod_cgid fails to launch CGI program. This also happens on httpd 2.0.55, however, it sometimes works there. i.e. All execution on 2.2.x fails on Solaris worker MPM, while about a half of them fails on 2.0.x on Solaris worker MPM. No problem with prefork MPM and mod_cgi. It is observed on Solaris 10 x86 64 bit kernel with 64 bit httpd binary. I did not check it on 32 bit environment. I will debug it into details later. The error_log shows the following lines. [Tue Apr 18 15:47:19 2006] [error] [client 192.168.237.21] Premature end of script headers: printenv [Tue Apr 18 15:47:19 2006] [error] [client 192.168.237.21] (3)No such process: cgid daemon is gone; is Apache terminating?: /var/apache2/cgi-bin/printenv [Tue Apr 18 15:47:19 2006] [notice] child pid 8121 exit signal Segmentation fault (11) [Tue Apr 18 15:47:19 2006] [error] cgid daemon process died, restarting
Have you applied Patch #120665 to Solaris? There is a known problem with Unix domain sockets on Solaris 10 without this patch.
I tried patch #120665 (and also the latest patch cluster), it changes nothing however. Let me have time to look into details.
My former message was not correct. The thing now changes that it sometimes happens, not always. In my v20z Solaris 10 x86 (amd64) box, the apache 2.2.2 sometimes fails to launch the CGI. When I added some debug codes inside sock_read()/sock_write() inside mod_cgid.c, the order of read/write sometimes changes, which causes SIGSEGV inside cgid server. I now guess this may be a Solaris fault because my v20z box has 2 dual core processors (total 4 cores), which can cause a race condition inside the multithreaded kernel. I created a patch to fix this problem. This is a passive approach in order to avoid the Solaris suspicious behavior, but works fine.
Created attachment 18160 [details] Fix the intermittent SIGSEGV in mod_cgid on Solaris 10 This patch eliminates the intermittent SIGSEGV in mod_cgid on Solaris 10. I am not sure about writev() and stdargs compatibility among many platforms.
*** Bug 34264 has been marked as a duplicate of this bug. ***
Fixed in trunk - r729579. Thanks for the patch!
Patch backported to 2.2 branch in r732067
Undo spam change