Client browser is not receiving response from server and remains waiting for it

Hello, I’m having weird a problem with nginx.

Sometimes, when I try to access the pages of my dedicated server from my
browser, I receive no response. My browser remains waiting with no stop
(there is no timeout).

I have a dedicated server, with 2 virtual machines. One of them, acts as
a
reverse proxy (with nginx), and the other one, acts as a webserver
(nginx
too).
I’m tailing the logs. When It happens, logs looks like this:
201.235.64.64 - icarabantes [27/Jul/2012:04:01:16 +0400] “GET
/admin/notification HTTP/1.1” 200 2287 “http://matweb.com/admin/
“Mozilla/5.0
(X11; Linux i686; rv:12.0) Gecko/20100101 Firefox/12.0”
It throws a 200 response, but my browser has never received it.

The most annoying thing it’s that it happens eventually, and then after
many retrials it comes back…
Any ideas???

Hello!

On Fri, Jul 27, 2012 at 06:35:00PM -0300, Matias Montenegro wrote:

201.235.64.64 - icarabantes [27/Jul/2012:04:01:16 +0400] “GET
/admin/notification HTTP/1.1” 200 2287 “http://matweb.com/admin/
“Mozilla/5.0
(X11; Linux i686; rv:12.0) Gecko/20100101 Firefox/12.0”
It throws a 200 response, but my browser has never received it.

The most annoying thing it’s that it happens eventually, and then after
many retrials it comes back…
Any ideas???

I would try to tcpdump what happens on the wire, preferably on
both ends (i.e. nginx and a client). From the description above
it looks like some wierd network problems, probably caused by some
misbehaving firewall.

Maxim D.

Hi Matias,

This sounds to me very similar to a problem I have been having recently
with the latest version of Chrome under Windows 7 64 bit.

For me it was an XMLHTTPRequest would be sent, logged at the server as
completed, but no reply received.

I an sure it is an intermittent bug in Chrome, but I have been unable to
reliably reproduce it.

Ian

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