Hi,
this while mail only concerns non Win and non Netware platforms.
Our detection of multi-threading during configure for mod_jk is broken.
We rely on the fact, that APR set -D_REENTRANT during build for
multi-threaded APR. But in fact
- APR doesn't set it for various platforms including AIX and Mac OS X
- APR sets it for the other platforms independant of building a
multi-threaded Apache httpd or not
So as a result, for Linux, Solaris and BSD we always build mod_jk with
thread locks, for AIX and Mac OS X we never have the thread locks (and
therefore we can produce wonderful crashes).
I checked installed Apache httpd to find out, how we could detect the
threading model of the apache httpd against we compile. Unfortunately we
can only find out the name of the MPM, but not (at least not in a robust
way) if it is threaded or not.
Since there are so many MPMs out there and i don't want to manage a long
table with all those names, I think we have no good way of detecting the
threading model.
I suggest, that we build against httpd 2.x always thread-safe, at least
unless the existing flag -enable-prefork is used and document this
behaviour.
This will in fact not change existing behaviour for the platforms
Solaris, Linux and BSD and will fix problems on AIX and Mac OS X.
Comments?
Regards,
Rainer
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