Program: 15578
Project: 15578
Buggy source:
@Override public void updateTriples(String graphURL,String newTriplePatterns,String oldTriplePatterns,String clientId,String token){
  HttpURLConnection conn=null;
  ObjectOutputStream dos=null;
  int responseCode=0;
  try {
    URL url=new URL(ObjectServletURL);
    conn=(HttpURLConnection)url.openConnection();
    conn.setDoInput(true);
    conn.setDoOutput(true);
    conn.setUseCaches(false);
    conn.setRequestMethod("String_Node_Str");
    conn.setRequestProperty("String_Node_Str",graphURL);
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    HashMap<String,String> patterns=new HashMap<String,String>();
    patterns.put("String_Node_Str",oldTriplePatterns);
    patterns.put("String_Node_Str",newTriplePatterns);
    dos=new ObjectOutputStream(conn.getOutputStream());
    dos.writeObject(patterns);
    dos.flush();
    dos.close();
    responseCode=conn.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
      BufferedReader reader=new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String response=reader.readLine();
      System.out.println("String_Node_Str" + response);
    }
 else {
      System.out.println("String_Node_Str" + responseCode);
    }
  }
 catch (  Exception ex) {
    ex.printStackTrace();
    System.out.println("String_Node_Str");
  }
}

Fixed version (ground truth):
@Override public void updateTriples(String graphURL,String newTriplePatterns,String oldTriplePatterns,String clientId,String token){
  HttpURLConnection conn=null;
  ObjectOutputStream dos=null;
  int responseCode=0;
  try {
    URL url=new URL(ObjectServletURL);
    conn=(HttpURLConnection)url.openConnection();
    conn.setDoInput(true);
    conn.setDoOutput(true);
    conn.setUseCaches(false);
    conn.setRequestMethod("String_Node_Str");
    conn.setRequestProperty("String_Node_Str",graphURL);
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str","String_Node_Str");
    conn.setRequestProperty("String_Node_Str",clientId);
    conn.setRequestProperty("String_Node_Str",token);
    HashMap<String,String> patterns=new HashMap<String,String>();
    patterns.put("String_Node_Str",oldTriplePatterns);
    patterns.put("String_Node_Str",newTriplePatterns);
    dos=new ObjectOutputStream(conn.getOutputStream());
    dos.writeObject(patterns);
    dos.flush();
    dos.close();
    responseCode=conn.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
      BufferedReader reader=new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String response=reader.readLine();
      System.out.println("String_Node_Str" + response);
    }
 else {
      System.out.println("String_Node_Str" + responseCode);
    }
  }
 catch (  Exception ex) {
    ex.printStackTrace();
    System.out.println("String_Node_Str");
  }
}