Recently my site (an https connection, running on an Amazon EC2 ubuntu apache2.2) has this issue where I need to load the page several times (3-4) before it will load normally without issue. It will then load normally as long as I keep loading pages regularly (every couple seconds). It will stall again if I don't load pages for a few minutes.

It has nothing to do with my application because I don't have this problem with the exact same app codebase on my Apache installation on my laptop.

The only things to my knowledge that I've changed is that I recently installed mod_spdy and then a few weeks later I installed mod_pagespeed, https://developers.google.com/speed/pagespeed/mod. However, I have since turned mod_pagespeed off by setting its pagespeed.conf to mod_pagespeed off. Unfortunately, that didn't solve the problem.

The line below is how every of last 10 lines of my error.log look:

# tail -f /var/log/apache2/error.log
...
[32728:32729:ERROR:mod_spdy.cc(162)] request->chunked == 1 in request GET / HTTP/1.1
[Sat Jun 02 04:50:08 2012] [warn] [client 50.136.93.153] [stream 5]   
[32728:32729:WARNING:http_to_spdy_filter.cc(113)] HttpToSpdyFilter is not the last filter 
in the chain: chunk

any thoughts? thank you, tim