debugging segmentation fault

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hello

we are running debian linux stable (Jessie) with apache 2.4.10 and mod_wsgi  4.3.0-1 on a x86_64 machine. 
our application is written in python 2.7 and django 1.8.

the list of modules as reported by apachectl -M are:
Loaded Modules:
 core_module (static)
 so_module (static)
 watchdog_module (static)
 http_module (static)
 log_config_module (static)
 logio_module (static)
 version_module (static)
 unixd_module (static)
 access_compat_module (shared)
 alias_module (shared)
 auth_basic_module (shared)
 authn_core_module (shared)
 authn_file_module (shared)
 authz_core_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 cgi_module (shared)
 deflate_module (shared)
 dir_module (shared)
 env_module (shared)
 filter_module (shared)
 mime_module (shared)
 mpm_worker_module (shared)
 negotiation_module (shared)
 perl_module (shared)
 rewrite_module (shared)
 setenvif_module (shared)
 socache_shmcb_module (shared)
 status_module (shared)
 wsgi_module (shared)

we were getting segmentation faults when rest api clients were making requests. the apache error log has the following messages:

[Mon Jul 27 09:04:38.375433 2015] [core:notice] [pid 32693:tid 140315326191488] AH00052: child pid 32700 exit signal Segmentation fault (11)
[Mon Jul 27 09:04:38.375556 2015] [core:notice] [pid 32693:tid 140315326191488] AH00052: child pid 32701 exit signal Segmentation fault (11)

i have enabled core dumps by setting ulimit to unlimited and adding core dump config directive in the apache2.conf file. 

but the core dumps are not happening.  

when i tried to debug using gdb (gdb /usr/sbin/apache2), the environment variables are not getting read. 

any clues on how to go about this? thanks in advance.






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