getQueryString() and getParameter()

[Sourabh Kulkarni]

Hi Gurus,     I am trying to send an object to servlet. The servlet is running on Tomcat 3.2.1 .In my client code, I create a URL object   URL url = new URL("http://localhost:8080/context/servletname?param=value");       I then open the connection and write the object to the stream. On server side, i had 2 experiences 1] If i use request.getQueryString() and then go ahead with reading the object from the stream, then it works fine.   2] If i use request.getParameter("param") and then go ahead with reading the object, I get the following excetpion on server.   2001-09-05 02:16:07 - Ctx( /context ): Exception in: R( /context + /servletname + null) - java.lang.IllegalArgumentException         at javax.servlet.http.HttpUtils.parseQueryString(HttpUtils.java:151)         at javax.servlet.http.HttpUtils.parsePostData(HttpUtils.java:254)         at org.apache.tomcat.util.RequestUtil.readFormData(RequestUtil.java:101)         at org.apache.tomcat.core.RequestImpl.handleParameters(RequestImpl.java:691)         at org.apache.tomcat.core.RequestImpl.getParameterValues(RequestImpl.java:259)         at org.apache.tomcat.core.RequestImpl.getParameter(RequestImpl.java:250)         at org.apache.tomcat.facade.HttpServletRequestFacade.getParameter(HttpServletRequestFacade.java:222)         at ControllerServlet.service(ControllerServlet.java:61)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)         at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)         at org.apache.tomcat.core.Handler.service(Handler.java:286)         at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)         at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)         at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)         at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210)         at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)         at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)         at java.lang.Thread.run(Thread.java:484)      Can someone tell me why this happens when i use getParameter and not when i use getQueryString? Thanks in advance, -Sourabh