400: Bad Request

Question

I am trying to get an inputStream to another servlet from a servlet. I am using standard well documented techniques for opening the connection. The getInputStream() call throws an exception as below:
java.io.FileNotFoundException: Response: '400: Bad Request' for url: 'http://localhost:7001/shoppingCart/SOAPServlet'
at weblogic.net.http.HttpURLConnection.getInputStream(HttpURLConnection.java:367)
at SendServlet.doGet(SendServlet.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
Here is the code snippet:
String payload = "THE PAYLOAD WILL BE HERE";
URL url = new URL("http://Localhost:7001/shoppingCart/SOAPServlet");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestProperty("SOAPMethodName","http://www.nicholaschase.com/soap/#InventorySold");
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.connect();
OutputStream toSOAP = conn.getOutputStream();
toSOAP.write(payload.getBytes());
toSOAP.close();
InputStream fromSOAP = conn.getInputStream();
The last line throws the exception. The servlet is a part of the web application and I am able to access the servlet if a type the URL in the browser window. The web.xml which deploys the servlet is as below:
<servlet>
<servlet-name>SOAPServlet</servlet-name>
<display-name>SOAPServlet</display-name>
<servlet-class>SOAPServlet</servlet-class>
<description>Sends SOAP Information back</description>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SOAPServlet</servlet-name>
<url-pattern>/SOAPServlet/*</url-pattern>
</servlet-mapping>
Could anybody let me know why the above exception will occur

Answer 1

This was posted back in 2002, but can someone tell me the solution for it. I am up against the wall with a very familier situation.
Thanks