PHP Client Hangs Apache: Any Ideas?

John McCaskey johnm at
Wed Mar 16 13:45:53 PST 2005

On Wed, 2005-03-16 at 14:43 -0700, Chris Bolt wrote:
> > I'd like more info on this, this has never once occured for me and we
> > use persistent connections in production.  If you could provide a
> > scenario that helps reproduce this I would certainly work to fix it.
> Well, to clarify, I'm using the pure PHP client. It's certainly not the 
> most reproduceable bug. When I was experiencing it, it would only happen 
> on one of six web servers at a time. I think it's caused by a php script 
> not finishing correctly, leaving the persistent connection in an 
> undefined state, so that the next time the connection is used it blocks. 
> It's been months since I disabled persistent connections though, so this 
> is all from memory.

Ahh, well I can't comment as to that then... but I'd suggest giving my c
extension a try as it should not suffer from the same issue :)

> > As to Greg's issue, we had a couple additional emails off list.  I think
> > part of the problem may be that he is running memcached on 2.4.x linux
> > kernels using select() as the polling method.  We have found memcached
> > to be unreliable when using select() and to slow down immensely
> > sometimes hanging, but to run perfectly with epoll under 2.6.x.
> We're using epoll on 2.6.

John A. McCaskey
Software Development Engineer
Klir Technologies, Inc.
johnm at

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