DO NOT REPLY [Bug 46942] error log messages: apr_global_mutex_lock(rewrite_log_lock) failed

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=46942


Dan Poirier <po...@pobox.com> changed:

           What    |Removed                     |Added
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           Priority|P2                          |P3




--- Comment #1 from Dan Poirier <po...@pobox.com>  2009-06-10 13:07:17 PST ---
I think I've figured out what's going on (with some help from Greg Ames).  Not
sure yet how to fix it.

The global mutex used by mod_rewrite to serialize writing to the rewrite log is
created in post_config().  So when the parent starts its graceful restart and
cleans up the old configuration, it's going to clean up - destroy - that global
mutex.  Children still finishing up requests now have a reference to a mutex
that no longer exists, hence attempts to lock the mutex fail.

I think the worst effect of this is the possibility that a few rewritelog
messages get intermingled in the log, which isn't too important.  Still, it
would be nice to figure out a way to make this work right.  Maybe somebody who
knows how modules work better than I knows how to do this.

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