Bug#591286: libapr1: upgrade breaks apache
On Sunday 01 August 2010, Adrian Bridgett wrote:
> i386 (but it's a KVM guest, sorry - I should have said).
I found out why posixsem does not work: A bug in pbuilder/cowbuilder
causes posix shared mem/posix semaphores to not work in the build
chroot and this causes apr's configure to disable it. Since I always
use cowbuilder to build the packages, all i386 libapr1 packages of the
last few years had non-working posixsem. The only exception was
1.2.12-5+lenny1 which was not uploaded by me but by Peter Samuelson.
You were simply lucky that you upgraded to lenny after version
1.2.12-5+lenny1 was released. With 1.2.12-5 it would not have worked
If you need it, you can fix it by rebuilding libapr1. It should work
if you either don't use pbuilder, or use pbuilder and put /dev/shm in
the BINDMOUNTS variable in /etc/pbuilderrc.
I haven't yet looked into the issue of "sem" trying to use posixsem
even if it is not available. This really does look like a bug in apr
Out of interest: Have you noticed any performance difference with
sslmutex sem instead of the default 'file'? The description of the
types on http://httpd.apache.org/docs/2.2/misc/perf-tuning.html says
that the semaphore mutex types are somewhat less robust.