Filed By : SPB JCK team (###@###.###)
JDK : java full version "1.5.0-beta2-b45"
JCK : 1.5
Platform[s] : Solaris X86, Windows
switch/Mode :
JCK test owner : http://javaweb.eng/jct/sqe/JCK-tck/usr/owners.jto
Failing Test [s] : Following tests are affected during test run:
> api/java_net/URLConnection/descriptions.html#getDate
> api/java_net/URLConnection/descriptions.html#doOutput
> api/java_net/URL/descriptions.html#getContent
> api/java_net/URLConnection/descriptions.html#UseCaches
>

Problem description:
====================

Method of class sun.net.www.protocol.http.HttpURLConnection
public synchronized InputStream getInputStream()
periodically throws unexpected NullPointerException.

Minimized test:
===============
--- test1.java ---
import java.net.*;
import java.io.*;

public class test1 {
    public static void main (String args[]){
        for (int i = 0; i <20; i++) {
            System.out.print(i + ": ");
            test1 t = new test1();
        }
    }
    String http_url = "http://javaweb/jck/index.html";
    URLConnection conn;

    public test1() {
        URL url = null;
        UCConfig conf = null;
        Object is = null;
        InputStream is1 = null;
        int i, count = 0;

        try {
            conf = new UCConfig(http_url, false);
            is1 = conf.getInputStream();
        } catch(RuntimeException e) {
            System.out.println("Can not setup test:" + e);
        }

        try {
            url = new URL(http_url);
            conn = url.openConnection();
            Class[] classes = {};
            is = conn.getContent(classes);
        } catch(IOException e) {
            System.out.println("Unexpected exception:" + e);
        } finally {
            close(is); conf.close();
        }

        if (is == null)
            System.out.println("OKAY");
        else {
            System.out.println("method getContent(Class[]) works unexpectedly with an empty array. It returns an object of " + is.getClass() + " type");
        }
    }

    public void close(Object obj) {
        try {
           if (obj != null) {
               if (obj instanceof InputStream) {
                   ((InputStream) obj).close();
               } else if (obj instanceof Reader) {
                   ((Reader) obj).close();
               }
           }
        } catch (IOException ioe) {
            System.out.println("Cannot close:" + obj + " :" + ioe);
        }
    }
}
class UCConfig {
    URL url = null;

    Socket soc = null;
    Socket dsoc = null;
    BufferedReader rdr = null;
    BufferedWriter wrt = null;
    InputStream is = null;
    OutputStream os = null;
    PrintStream pos = null;

    public UCConfig(String surl, boolean closeStreams) {
        try {
            url = new URL(surl);
        } catch (Exception e) {
            throw new RuntimeException("Failed to setup - invalid URL:" + url);
        }
        parseHttpHeaders();
        if (closeStreams) close();
    }
    private void parseHttpHeaders() {
        SecurityManager sec = System.getSecurityManager();
        String host = null;
        String file = null;
        String req = null;
        String head_line = null;
        int port = 80;

        host = url.getHost();
        file = url.getFile().length() < 1 ? "/" : url.getFile();

        port = url.getPort()> 0 ? url.getPort() : 80;

        req = "GET " + ( file + " HTTP/1.0" );

        if (host == null) {
            throw new RuntimeException("Failed to setup - invalid host");
        }

        try {
            soc = new Socket(host, port);
            is = soc.getInputStream();
            os = soc.getOutputStream();
        } catch (Exception e) {
            throw new RuntimeException("Can not connect to host:" + host + ":" + e);
        }

        if (is == null) {
            throw new RuntimeException("Can not get InputStream");
        }

        if (os == null) {
            throw new RuntimeException("Can not get OutputStream");
        }

        try {
            String encoding = "US-ASCII";
            rdr = new BufferedReader( new InputStreamReader(is, encoding) );
            wrt = new BufferedWriter( new OutputStreamWriter(os, encoding) );
        } catch (java.io.UnsupportedEncodingException e2) {
            // should never arise
            throw new RuntimeException("Unknown ascii encoding : " + e2);
        }

        try {
            wrt.write(req, 0, req.length());
            wrt.write("\r\n");
            wrt.write("\r\n");
            wrt.flush();
        } catch (Exception e) {
            throw new RuntimeException("Can not write request");
        }

        /*
         * Read in head lines....
         */
        try {
             rdr.readLine();
        } catch (Exception e) {
             throw new RuntimeException("Can not read from server..." + e);
        }
    }
    public InputStream getInputStream() {
        return is;
    }
    public void close() {
        try {
            if ( is != null )
                is.close();
            if ( os != null )
                os.close();
            if ( soc != null )
                soc.close();
            if ( dsoc != null )
                dsoc.close();
        } catch (IOException e) {
            // ignore
        }
    }
}
--- end ---

Minimized test output:
======================
% uname -a
SunOS jctjck16 5.9 Generic_112234-05 i86pc i386 i86pc
% /java/re/jdk/1.5.0/promoted/beta2/b45/binaries/solaris-i586/bin/java test1
0: OKAY
1: OKAY
2: OKAY
3: OKAY
4: OKAY
5: OKAY
6: OKAY
7: OKAY
8: OKAY
9: Exception in thread "main" java.lang.NullPointerException
        at sun.net.www.http.HttpClient.getProxyPortUsed(HttpClient.java:867)
        at sun.net.www.protocol.http.HttpURLConnection.writeRequests(HttpURLConnection.java:356)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:820)
        at java.net.URLConnection.getContent(URLConnection.java:708)
        at test1.<init>(test1.java:32)
        at test1.main(test1.java:8)

Additional comments:
======================
This bug have been introduced in JDK 1.5.0-beta2-b42 promotion.

Specific Machine Info:
=====================
Windows_NT JCTJCK23 5 02 586
SunOS jctjck16 5.9 Generic_112234-05 i86pc i386 i86pc


-------------------
###@###.### 2004-05-07

Same problem reported by a CAP member:

J2SE Version (please include all output from java -version flag):
  java version "1.5.0-beta2"
  Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b44)
  Java HotSpot(TM) Client VM (build 1.5.0-beta2-b44, mixed mode, sharing)

Does this problem occur on J2SE 1.3.x or 1.4.x? Yes / No (pick one)
  No, it occur on 1.5.

Operating System Configuration Information (be specific):
  Microsoft Windows 2000 Server
  Version 5.0.2195 Service Pack 4 Build 2195

Hardware Configuration Information (be specific):
  Pentium 4, x86 Family 15 Model 1 Stepping 2 GenuineIntel ~1694 MHz
  1GB Memory

Bug Description:
  We get the following exception with v 1.5.0 beta 2 build 44:
 
  java.lang.NullPointerException
        at sun.net.www.http.HttpClient.getProxyPortUsed(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.writeRequests(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 
  after we have called the method:
 
   URLConnection urlConnection;
   urlConnection = url.openConnection();
   urlConnection.setUseCaches(true);
   urlConnection.setDoInput(true);
   urlConnection.connect();
   InputStream in = urlConnection.getInputStream();

Steps to Reproduce (be specific):

   URLConnection urlConnection;
   urlConnection = url.openConnection();
   urlConnection.setUseCaches(true);
   urlConnection.setDoInput(true);
   urlConnection.connect();
   InputStream in = urlConnection.getInputStream();
###@###.### 2004-09-27