DO NOT REPLY [Bug 42829] - graceful restart with multiple listeners using prefork MPM can result in hung processes

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http://issues.apache.org/bugzilla/show_bug.cgi?id=42829





------- Additional Comments From sf@sfritsch.de  2007-10-18 05:41 -------
The patch from the bug submitter does not close the listening sockets until the
current request has been finished, therefore breaking graceful-stop behaviour.

Depending on OS and used apr_pollset_poll variant, it seems that both
apr_pollset_poll() and lr->accept_func() can block if the sockets have been
closed in the meantime. This can be mitigated by checking for die_now before
calling these two functions (though a short race condition still remains).

Maybe it would also be possible to change apr to not block if all listening
sockets in the pollset are closed.



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