Program: 43409
Project: 43409
Buggy source:
@Override public Response send() throws HttpException {
  try {
    String boundary="String_Node_Str";
    openConnection();
    setupRequestHeader();
    conn.setRequestProperty("String_Node_Str","String_Node_Str" + boundary);
    setupDoInputOutputFlag();
    Map<String,?> params=request.getParams();
    if (null != params && params.size() > 0) {
      DataOutputStream outs=new DataOutputStream(conn.getOutputStream());
      for (      Entry<String,?> entry : params.entrySet()) {
        outs.writeBytes("String_Node_Str" + boundary + SEPARATOR);
        String key=entry.getKey();
        File f=new File(entry.getKey());
        if (f.exists()) {
          outs.writeBytes("String_Node_Str" + key + "String_Node_Str"+ entry.getValue()+ "String_Node_Str");
          outs.writeBytes("String_Node_Str");
          InputStream is=new FileInputStream(f);
          byte[] buffer=new byte[is.available()];
          while (true) {
synchronized (buffer) {
              int amountRead=is.read(buffer);
              if (amountRead == -1) {
                break;
              }
              outs.write(buffer,0,amountRead);
              outs.writeBytes("String_Node_Str");
            }
          }
          Streams.safeClose(is);
        }
 else {
          outs.writeBytes("String_Node_Str" + key + "String_Node_Str");
          outs.writeBytes(entry.getValue() + "String_Node_Str");
        }
      }
      outs.writeBytes("String_Node_Str" + boundary + "String_Node_Str"+ SEPARATOR);
      Streams.safeFlush(outs);
      Streams.safeClose(outs);
    }
    return createResponse(getResponseHeader());
  }
 catch (  IOException e) {
    throw new HttpException(request.getUrl().toString(),e);
  }
}

Fixed version (ground truth):
@Override public Response send() throws HttpException {
  try {
    String boundary="String_Node_Str";
    openConnection();
    setupRequestHeader();
    conn.setRequestProperty("String_Node_Str","String_Node_Str" + boundary);
    setupDoInputOutputFlag();
    Map<String,Object> params=request.getParams();
    if (null != params && params.size() > 0) {
      DataOutputStream outs=new DataOutputStream(conn.getOutputStream());
      for (      Entry<String,?> entry : params.entrySet()) {
        outs.writeBytes("String_Node_Str" + boundary + SEPARATOR);
        String key=entry.getKey();
        File f=null;
        if (entry.getValue() instanceof File)         f=(File)entry.getValue();
 else         if (entry.getValue() instanceof String)         f=Files.findFile(entry.getValue().toString());
        if (f != null && f.exists()) {
          outs.writeBytes("String_Node_Str" + key + "String_Node_Str"+ entry.getValue()+ "String_Node_Str");
          outs.writeBytes("String_Node_Str");
          if (f.length() == 0)           continue;
          InputStream is=new FileInputStream(f);
          byte[] buffer=new byte[is.available()];
          while (true) {
            int amountRead=is.read(buffer);
            if (amountRead == -1) {
              break;
            }
            outs.write(buffer,0,amountRead);
            outs.writeBytes("String_Node_Str");
          }
          Streams.safeClose(is);
        }
 else {
          outs.writeBytes("String_Node_Str" + key + "String_Node_Str");
          outs.writeBytes(entry.getValue() + "String_Node_Str");
        }
      }
      outs.writeBytes("String_Node_Str" + boundary + "String_Node_Str"+ SEPARATOR);
      Streams.safeFlush(outs);
      Streams.safeClose(outs);
    }
    return createResponse(getResponseHeader());
  }
 catch (  IOException e) {
    throw new HttpException(request.getUrl().toString(),e);
  }
}