[opencms-dev] Strange behavour in Firefox: OpenCms appears to serve up empty pages

[Jonathan Woods]

Every so often after developing and deploying some material on my OpenCms
installation (6.0.4 on Linux, with Tomcat 5.5.15 and JDK 1.5 update 6),
visiting a URL in Firefox (1.5.01 for Win XP) returns an empty page where
I'd previously been seeing some content.  Even more oddly:
 
1.  When this happens, from the same machine (and from others) the page
still loads normally when using Internet Explorer, wget or whatever.
 
2.  Clearing the Firefox cache doesn't help.  Firefox Tools/Page Info
reports a content length of 0 bytes, but does give an up-to-date
modification date/time.
 
3.  FlexCache isn't caching - or at least, (i) I haven't explicitly invoked
it, and certainly not with any user-agent variations; (ii) the problem still
happens after going to Workplace/Administration/Flex Cache and clearing all
entries; (iii) the problem still happens if I use a Flex cache directive in
the URL query string (thanks, Joe).
 
4.  Visiting the URL using an equivalent IP address rather than the host
name doesn't help.
 
5.  Back at the server, the mod_jk log I'm keeping reports (for the Firefox
visits) HTTP/1.1 200 OK responses, but with content length 0.  I can't
reproduce this from the server e.g. using wget, because wget retrieves the
content without any problem.
 
I suppose I'd better grit my teeth and use IE for a while, but I'd be
fascinated to hear from anyone who thinks they know what's happening!
 
Jon
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