FULL PRODUCT VERSION :
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b75)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b75, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
I created a simple demo to reproduce this bug.
A client sends and receives continuously http POST messages to the new HttpServer. The client sends short
numbers via DataOutputStream and the server simply replies this number. When one of the two bytes of the short number
becomes to negative there are exceptions on client side (on the server side there are no errors, at all):

Send: 120
Received: 120
Send: 121
Received: 121
Send: 122
Received: 122
Send: 123
Received: 123
Send: 124
Received: 124
Send: 125
Received: 125
Send: 126
Received: 126
Send: 127
Received: 127
Send: 128
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)Send: 129

at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:575)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
Send: 130
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
Send: 131
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)

.
.
.
.
.
.
.
.
.
.
Send: 254
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
Send: 255
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
Send: 256
Received: 256
Send: 257
Received: 257
Send: 258
Received: 258
Send: 259
Received: 259
Send: 260
Received: 260
Send: 261
Received: 261
Send: 262
Received: 262
Send: 263
Received: 263
Send: 264
Received: 264
Send: 265
Received: 265
Send: 266
Received: 266
Send: 267
Received: 267
.
.
.
.
.
.
.
.
.
.
.
Send: 382
Received: 382
Send: 383
Received: 383
Send: 384
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:575)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)
Send: 385
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:688)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:686)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:558)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:974)
at httpserverTest.Client.main(Client.java:38)



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package httpserverTest;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class Client {

public static void main(String[] args) {

short counter = 120;

while(true) {
try {
if (counter > 30000) {
counter = 0;
}

HttpURLConnection connection = getHttpURLConnection(new URL("http://fintat/server/"), 10000);

OutputStream os = connection.getOutputStream();

DataOutputStream dos = new DataOutputStream(os);

System.out.println("Send: " + counter);

dos.writeShort(counter);

dos.close();

counter++;

InputStream is = connection.getInputStream();

DataInputStream dis = new DataInputStream(is);

short ret = dis.readShort();

System.out.println("Received: " + ret);

dis.close();

} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}



static HttpURLConnection getHttpURLConnection(URL url, int timeout) throws IOException {

HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();

httpURLConnection.setConnectTimeout(40000);
httpURLConnection.setReadTimeout(timeout);
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
httpURLConnection.setUseCaches(false);
httpURLConnection.setAllowUserInteraction(false);
httpURLConnection.setRequestMethod("POST");

// HttpURLConnection httpURLConnection = new MyHttpURLConnection(url);

return httpURLConnection;
}
}



package httpserverTest;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.concurrent.Executors;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class Server {

static class MyHandler implements HttpHandler {

public MyHandler() {

}

public void handle(HttpExchange arg0) throws IOException {
InputStream is = arg0.getRequestBody();
OutputStream os = arg0.getResponseBody();

DataInputStream dis = new DataInputStream(is);

short input = dis.readShort();

System.out.println(input);

DataOutputStream dos = new DataOutputStream(os);

arg0.sendResponseHeaders(200, 2);

dos.writeShort(input);

dos.close();
}

}

public static void main(String[] args) {
try {
final HttpServer server = HttpServer.create(new InetSocketAddress(80), 400);
server.createContext("/server/", new MyHandler());

server.setExecutor(null);//Executors.newFixedThreadPool(3));//(new MyExecutor(50));

server.start();

} catch (IOException e) {

e.printStackTrace();
}

}
}
---------- END SOURCE ----------