Hi, just filed https://bz.apache.org/bugzilla/show_bug.cgi?id=63271
(Patch attached) It seems to be the reason behind various crashes/restarts seen in Apache httpd on Windows, especially when mod_cache_disk is in use. Basically when the mutex is cleaned up twice, it calls CloseHandle() on uninitialized memory, which causes First Chance Exceptions in the debugger (if invalid handle) or closes some random Handle behind the back of its real owner (e.g. internal handles of the userspace leading to access violations inside CreateProcess, httpd Events used to signal between parent and child, etc.). It would be great if this could make it into 1.7. Thanks, Michael ---------------------- Michael Schlenker Senior Software Engineer CONTACT Software GmbH Tel.: +49 (421) 20153-80 Wiener Straße 1-3 Fax: +49 (421) 20153-41 28359 Bremen E-Mail: michael.schlen...@contact-software.com http://www.contact-software.com/ Registered office: Bremen, Germany Managing directors: Karl Heinz Zachries, Ralf Holtgrefe Court of register: Amtsgericht Bremen HRB 13215