Ivan,
It's a bit hard to say exactly what is going on here as we
probably need a bit more info....
but I'll hazard some guesses.
Firstly, I don't know of anything in recent jetty releases
that would send a 302 response to a multipart POST, so if the
302 being sent is new, then I don't think it is jetty that is
sending it.
It is correct that a new request after a 302 should be a
GET, but technically speaking a GET should not include a
message body. We've never really agreed with that part of
the spec and Jetty is typically happy to accept a GET with a
body. However, you may wish to review your client and/or
design if it really relies on this, as I'm pretty sure it is
not required to be supported.
But looking at the image supplied, it does appear that a
GET request is eventually generated that has the multipart
content.
So how are you doing the file upload? MultipartFilter?
Servlet 3.1 Part API? ServletRequest.getParameter?
You could try adding POST to the methods that support form
content in HttpConfigurationClass, but I'm not entirely sure
that will help... but I'm guess there is some kind of method
switch in the path that needs to be configured. Tell us what
the path is and we can tell you more.
cheers