[clue-tech] 504 Error

[Jason S. Friedman]

>> Some users are receiving a ERROR 504 "GATEWAY TIME OUT" when
>> attempting to reach my website, but most are not.  What can cause this?
> 
> The times I see this error are when I'm forwarding HTTP requests from a
> web server to another server, like Jboss or tomcat.  The gateway time
> out means that the connection from the web server to the other server is
> timing out.

No application server involved.  Just vanilla Apache from Ubuntu, though
with three virtual domains.  Haven't changed the configuration in a while.