The commons HttpClient library does not automatically do redirects (see http://jakarta.apache.org/commons/httpclient/redirects.html). So, when the WebServiceProxyGenerator receives a redirect response, which has no body, it chokes on it. In my case I was trying to proxy a JSPWiki instance - the POST requests, which generate a 302 response, caused this error. It seems that the redirects have to be handled by the WebServiceProxyGenerator class.
-- Ramon Casha <ramon.casha (at) linux.org.mt> Malta Linux User Group