I've been trying to deploy rpmgrok (a Turbogears 1 app [1]) behind mod_wsgi, and finally figured out why mod_wsgi stopped working when I added a WSGIProcessGroup directive (which avoids having to start a new process per http request) I know bpeck has had similar issues with his "beaker" code [2] It was working on publictest14.fp.org, but not on my local workstation (both RHEL-5 running mod_wsgi from EPEL). Attempts to browse led to no response coming from httpd, and no log. It turned out, I had mod_python installed on the box. Upon disabling "LoadModule python_module modules/mod_python.so" from /etc/httpd/conf.d/python.conf it worked. Known issue? http://code.google.com/p/modwsgi/wiki/InstallationIssues describes another mod_wsgi/mod_python incompatibility, but the symptoms seem different [3] Hope this helps Dave [1] https://fedorahosted.org/rpmgrok/ [2] https://fedorahosted.org/beaker/ [3] debugging attempts led me to find "stuck" httpd threads waiting forever for the global interpreter lock, presumably acquired by mod_python elsewhere in the process: (gdb) bt #0 0x005bf402 in __kernel_vsyscall () #1 0x0018331e in sem_wait@xxxxxxxxx () from /lib/i686/nosegneg/libpthread.so.0 #2 0x01d97f3b in PyThread_acquire_lock () from /usr/lib/libpython2.4.so.1.0 #3 0x01d74d57 in PyEval_RestoreThread () from /usr/lib/libpython2.4.so.1.0 #4 0x01d9104f in PyGILState_Ensure () from /usr/lib/libpython2.4.so.1.0 #5 0x00c65785 in wsgi_start_process (p=0x918a550, daemon=0x92b91a8) at mod_wsgi.c:8706 #6 0x00c661b3 in wsgi_hook_init (pconf=0x918a550, ptemp=0x91b8608, plog=0x91bc618, s=0x918c3f0) at mod_wsgi.c:8919 #7 0x00c27783 in ap_run_post_config (pconf=0x918a550, plog=0x91b8608, ptemp=0x91bc618, s=0x918c3f0) at /usr/src/debug/httpd-2.2.3/server/config.c:91 #8 0x00c1311d in main (argc=152602056, argv=0x9281448) at /usr/src/debug/httpd-2.2.3/server/main.c:706 and: grep /proc/$PID/maps mod_ showed mod_python to be loaded. _______________________________________________ Fedora-infrastructure-list mailing list Fedora-infrastructure-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-infrastructure-list
