--- a/jdk/src/share/classes/sun/net/httpserver/ExchangeImpl.java	Thu Oct 15 11:55:19 2009 +0100
+++ b/jdk/src/share/classes/sun/net/httpserver/ExchangeImpl.java	Thu Oct 15 14:02:34 2009 +0100
@@ -31,6 +31,7 @@
 import java.net.*;
 import javax.net.ssl.*;
 import java.util.*;
+import java.util.logging.Logger;
 import java.text.*;
 import sun.net.www.MessageHeader;
 import com.sun.net.httpserver.*;
@@ -204,6 +205,21 @@
         tmpout.write (bytes(statusLine, 0), 0, statusLine.length());
         boolean noContentToSend = false; // assume there is content
         rspHdrs.set ("Date", df.format (new Date()));
+
+        /* check for response type that is not allowed to send a body */
+
+        if ((rCode>=100 && rCode <200) /* informational */
+            ||(rCode == 204)           /* no content */
+            ||(rCode == 304))          /* not modified */
+        {
+            if (contentLen != -1) {
+                Logger logger = server.getLogger();
+                String msg = "sendResponseHeaders: rCode = "+ rCode
+                    + ": forcing contentLen = -1";
+                logger.warning (msg);
+            }
+            contentLen = -1;
+        }
         if (contentLen == 0) {
             if (http10) {
                 o.setWrappedStream (new UndefLengthOutputStream (this, ros));

--- a/jdk/src/share/classes/sun/net/www/protocol/http/HttpURLConnection.java	Thu Oct 15 11:55:19 2009 +0100
+++ b/jdk/src/share/classes/sun/net/www/protocol/http/HttpURLConnection.java	Thu Oct 15 14:02:34 2009 +0100
@@ -1180,6 +1180,10 @@
                 inputStream = http.getInputStream();
 
                 respCode = getResponseCode();
+                if (respCode == -1) {
+                    disconnectInternal();
+                    throw new IOException ("Invalid Http response");
+                }
                 if (respCode == HTTP_PROXY_AUTH) {
                     if (streaming()) {
                         disconnectInternal();

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/com/sun/net/httpserver/bugs/B6886436.java	Thu Oct 15 14:02:34 2009 +0100
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6886436
+ * @summary
+ */
+
+import com.sun.net.httpserver.*;
+
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.logging.*;
+import java.io.*;
+import java.net.*;
+
+public class B6886436 {
+
+    public static void main (String[] args) throws Exception {
+        Logger logger = Logger.getLogger ("com.sun.net.httpserver");
+        ConsoleHandler c = new ConsoleHandler();
+        c.setLevel (Level.WARNING);
+        logger.addHandler (c);
+        logger.setLevel (Level.WARNING);
+        Handler handler = new Handler();
+        InetSocketAddress addr = new InetSocketAddress (0);
+        HttpServer server = HttpServer.create (addr, 0);
+        HttpContext ctx = server.createContext ("/test", handler);
+        ExecutorService executor = Executors.newCachedThreadPool();
+        server.setExecutor (executor);
+        server.start ();
+
+        URL url = new URL ("http://localhost:"+server.getAddress().getPort()+"/test/foo.html");
+        HttpURLConnection urlc = (HttpURLConnection)url.openConnection ();
+        try {
+            InputStream is = urlc.getInputStream();
+            while (is.read()!= -1) ;
+            is.close ();
+            urlc = (HttpURLConnection)url.openConnection ();
+            urlc.setReadTimeout (3000);
+            is = urlc.getInputStream();
+            while (is.read()!= -1);
+            is.close ();
+
+        } catch (IOException e) {
+            server.stop(2);
+            executor.shutdown();
+            throw new RuntimeException ("Test failed");
+        }
+        server.stop(2);
+        executor.shutdown();
+        System.out.println ("OK");
+    }
+
+    public static boolean error = false;
+
+    static class Handler implements HttpHandler {
+        int invocation = 1;
+        public void handle (HttpExchange t)
+            throws IOException
+        {
+            InputStream is = t.getRequestBody();
+            Headers map = t.getRequestHeaders();
+            Headers rmap = t.getResponseHeaders();
+            while (is.read () != -1) ;
+            is.close();
+            // send a 204 response with an empty chunked body
+            t.sendResponseHeaders (204, 0);
+            t.close();
+        }
+    }
+}