Re: [mp2] Segmentation faults with threaded worker-mpm

[Fred Moyer <suppressed>]

Jani M. wrote:
> Jani M. wrote:
> After a few moments of trial and error, I tracked the problem down to 
> $r->push_handlers(PerlFixupHandler => \&fixup_handler). The segfaults 
> start even if this is the only thing the original postreadrequesthandler 
> does, and even if the fixuphandler does absolutely nothing. If I set the 
> same fixuphandler in the server config file, and don't use 
> push_handlers, the problem goes away.

So you push this fixup handler in the postreadrequesthandler?  There is 
a known issue with this which sounds like it could be related:

http://marc.info/?l=apache-modperl&m=115812572132632&w=2

I have dug into the issue somewhat but have been caught up in a tuit 
drought lately and haven't made much progress on it.  The gist of it is, 
if you push a handler onto a different phase, any existing handlers for 
that phase are removed and replaced with the new pushed handler.  I 
haven't tried this under threads but have been able to replicate the 
issue in a reproducible test case (see mail thread).