https://bz.apache.org/bugzilla/show_bug.cgi?id=60487
--- Comment #11 from Jeff W <apa...@wheelhouse.org> --- After reading the source code at some length, I think I'm getting it now. Just to see if I'm following along... - httpd goes through the config file twice in its main loop, once (ap_read_config) is a pre-scan to build up a list of modules, hooks, the config tree, etc, and a second time (ap_process_config_tree) to actually configure. - Registered pre_config hooks are called after ap_read_config finishes and before ap_process_config_tree. - The MPM's "retained" variable is initialized in its pre_config hook. - If a restart signal arrives anytime after the MPM has been loaded in ap_read_config and before the MPM's pre_config hook is called, its "retained" variable will never have been initialized. - The uninitialized "retained" variables is a "lucky" NULL (rather than purely undefined) due to being a static variable a dlopen()'d module. - The NULL value leads to this crash. - Jacob's case is exercising the crash because it involves a huge config file and the MPM directive is probably very near the top, maximizing the window during which signals will have this effect, possibly to many seconds. - My case is exercising the crash frequently because my environment causes two restart signals to arrive unusually close together under certain circumstances. Is all of that correct? Thanks! -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: bugs-unsubscr...@httpd.apache.org For additional commands, e-mail: bugs-h...@httpd.apache.org
