[Weblogic 12] MultipartFormInputStream - Error while reading servlet request multi-part data

Guys,

In case of multipart form usage on weblogic I can see following error:

org.apache.wicket.util.upload.MultipartFormInputStream skipPreamble
SEVERE: Error while reading servlet request multi-part data: Stream ended unexpectedly. boundary='------WebKitFormBoundaryFC53Qc4d6X14dkcmcm'; bufSize=4096

I'm aware about following issue: https://issues.apache.org/jira/browse/WICKET-4469

But weblogic seems to be more corporate used and, unfortunatly, can't be easily patched and etc. And more over: might be reason of this error not in Weblogic especially, but in latest wicket.

If can give me some guidence on code where to check remotely what's going on and what container behaviour might be a reson: that will be very appriciated.

I'm debugging org.apache.wicket.util.upload.MultipartFormInputStream and can't find exact reason why preamble can't successfully skiped.