Thanks for all your answers so far! I'm still trying to figure out the problem but there are also some other things I need to take care of.
Just to make it clear, here is a summary of my problem and what was suggested so far: - We have a webapp that serves content (html, xhtml, ...) and images (jpg, png, ...). - Both, content and images, are _not_ static. - They are generated by two different servlets in the same context. - The images are generated _only_ on the server that processed the content request. - This means subsequent image requests have to be routed to the same server as the content request. - We enabled session cookies and URL rewriting (the latter via EncodeUrlTransformer of Cocoon). - The cookie path is equal to the context path, so the cookies are valid for both servlets (content and images). - In general the whole mod_jk load balancing works fine, with or without cookies (I tried disabling cookies on my iPhone and it worked as expected). - Some devices however don't seem to send cookies with image requests, although they send a valid cookie with the previous content request. - The latter may or may not be a problem of the devices themselves or an intermediate proxy or something else (we already had a problem with BlackBerry servers killing sessions). I have yet to try what Rainer suggested: adding the cookie information to the access log. The problem was, that we need the access logs for statistics and I didn't know (till Christopher wrote it), that we could set up a secondary log. Once I have that running, I might be able to give more details. Greetings, Timo
