Jersey/Glassfish: what is consuming POST parameters? - glassfish

Question

I have a Jersey 2.x servlet running under Glassfish 4.0. There is a method that processes a form submission:
#POST
#Consumes(MediaType.APPLICATION_FORM_URLENCODED)
#Path("/{serial}")
public Response saveUnit(....) { ... }
I get the message "A servlet request to the ... contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters."
However, I don't have any filters defined. Other than whatever Glassfish and Jersey do by default.
I do however have a listener defined (which I had forgotten about).
I suspect this is why my attempt to use MultivaluedMap isn't working.
Any ideas what is consuming the request?
Here is the Jersey method:
#POST
#Consumes(MediaType.APPLICATION_FORM_URLENCODED)
#Path("/{unitid}")
public Response saveUnit(#PathParam("unitid")int unitId, #Context UriInfo uri) {
MultivaluedMap<String, String> queryParams = uri.getQueryParameters();
for (String k:queryParams.keySet()) {
logger.info(k);
}
return Response.ok().build();
}
The map queryParams is empty.
Here is my web.xml.
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>mycompany.ApplicationConfig</servlet-name>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>mypackage</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>mycompany.ApplicationConfig</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<listener>
<listener-class>mycompany.ServletContextClass</listener-class>
</listener>
</web-app>

Answer 1

To get to the received form parameters in your resource method change the signature of the method to:
public Response saveUnit(#PathParam("unitid") int unitId,
final javax.ws.rs.core.Form form) {
...
}
or
public Response saveUnit(#PathParam("unitid") int unitId,
final MultivaluedMap<String, String> formData) {
...
}
Jersey will fill the values.
With your approach you're asking Jersey to return a map of query params (which are part of URI and assuming from the question you want Form params).