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PORequest parameters are dropped in Tomcat
 

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    <p>Client code:</p> <pre><code> FormDataBodyPart f = new FormDataBodyPart(...); FormDataBodyPart f2 = new FormDataBodyPart(...); MultiPart multiPart = new MultiPart(); multiPart.bodyPart(f); multiPart.bodyPart(f2); //Execute Call WebResource wr = resource().path(Url.X); wr = wr.queryParam("subjectId", "value_something"); ClientResponse response = wr.type(MediaType.MULTIPART_FORM_DATA).post(ClientResponse.class, multiPart); </code></pre> <p>Server code:</p> <pre><code>String id = req.getParameter("subjectId"); </code></pre> <p>req is HttpServletRequest - injected by spring</p> <pre><code>@Context protected HttpServletRequest httpServletRequest; </code></pre> <p>Problem: on some of the environments the <code>id</code> parameter retrieved is null. In the filter we print the while request parameters map to log in it is just empty.<br/> We believe the problem is on server side since the same client executed vs. different environments gives different result.<br/> On some servers the parameter is always empty, from all clients, and on other environments the parameter is always there, from all clients.<br/> So... it looks like the problem on the Tomcat side, but... where?</p> <p>Update: result from wireshark on server:</p> <pre><code>[Malformed Packet: MIME multipart] Expert Info (Error/Malformed): Malformed Packet (Exception occurred) Message: Malformed Packet (Exception occurred) </code></pre> <p>on some servers despite the error - the parameter is there and on others the param is missing.</p> <p><br/> <br/> <strong>Update</strong>: the logged request by AccessLogValve contains the parameter<br> 127.0.0.1 - - [26/Nov/2012:03:04:58 -0800] "POST /api/get-retrieve?<strong>x=y</strong> HTTP/1.1" 200 16<br/> So, probably the problem is somewhere in the Tomcat throwing out those params...</p>
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    1. CODo you have a rev proxy before tomcat ? Ngnix httpd haproxy ?
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    2. COWe are using this one http://haproxy.1wt.eu/ - I also tried direct access without going through the load balancer. With direct access it also failed, but I need to recheck with IT that direct is indeed not mapped in some place...
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    3. COI would try to tcpdump http traffic going out of the client and second into the tomcat to see if the param is present in request.
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