This issue is now resolved: my fortran binary handles very large arrays and complex functions requiring an unlimited stack size.
Despite that the stack size limit was defined on a system-wide basis (in /etc/security/limits.conf), for any reason it appears that the "apache/perl/fortran binary" ensemble was not aware of that (causing my binary to crash each time it was called). At the contrary, when I manually restarted apache at the shell prompt, the stacksize limit was correctly passed (.bashrc with 'ulimit -S -s unlimited'). As a workaround, I used BSD::Resource module (http://search.cpan.org/~jhi/BSD-Resource-1.2907/Resource.pm) to define stacksize directly in my perl script by using e.g. setrlimit(RLIMIT_STACK, $softlimit, $hardlimit); Thus, these new stack size limits are now directly passed from my perl script to my binary. Thanks for your time and providing me with insights to fix this issue! Cheers. ---- Message d'origine ---- De : le...@netcourrier.com À : "Pete Houston" <p...@openstrike.co.uk>;    users@httpd.apache.org Objet : Re: Re: [users@httpd] Strange apache behaviour when lauching an externalbinary called by a perl script Date : 21/11/2013 16:53:10 CET Nice suggestion. But unfortunately both environments are the same (and my binary is compiled with static library option). ---- Message d'origine ---- De : "Pete Houston" <p...@openstrike.co.uk> À : users@httpd.apache.org Objet : Re: [users@httpd] Strange apache behaviour when lauching an externalbinary called by a perl script Date : 21/11/2013 14:40:33 CET Possibly a difference in environment would cause this (perhaps LD_LIBRARY_PATH or similar?). Compare the environment in your failing at job with the environment in your successful shell command and determine if there are any differences. HTH, Pete -- Openstrike - improving business through open source http://www.openstrike.co.uk/ or call 01722 770036 / 07092 020107 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAlKODVEACgkQdzfnYmsKt524FACgncbrG/UwTOKTXPMp5Zs26FoA HI4AoKIpwfFsqkJHQSuOdolX0lXnCHWh =6+wF -----END PGP SIGNATURE-----
