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From Marc Slemko <>
Date Thu, 22 Jan 1998 06:27:16 GMT
On Thu, 22 Jan 1998, Rasmus Lerdorf wrote:

> Ok, this is more than coincidence now.  Something really odd is happening
> here.  I have now had more than 10 PHP3 users report exactly the same 
> symptoms.  When they compile Apache 1.3 by itself everything is fine.  
> When they compile it with PHP3 linked in, the server just sits there and
> doesn't answer requests.  When they recompile Apache with 
> USE_FCNTL_SERIALIZED_ACCEPT defined and link in PHP3 everything is fine.
> All reports have been from Solaris 2.5.1 users.
> I don't understand this bit of the Apache code well enough.  What could I
> possibly be doing in my module which would cause this?
> Could it have something to do with using setitimer and getting SIGPROF
> signals?  The problem seems to happen much too quickly for any of the
> timers to actually go off, but could the mere presence of a signal handler
> for SIGPROF or an active itimer be causing some problem here?
> And why the heck is it only biting me on Solaris?

Get the output of a truss() on a child.

I can't think of any reason for this happening offhand, but...

Is this with current 1.3 CVS tree or older stuff?  There were issues with
pthread serialized accepts for a while that could result in anything

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