Program: 172679
Project: 172679
Buggy source:
/** 
 * (non-Javadoc)
 * @see io.vertx.core.AbstractVerticle#start()
 */
@Override public void start() throws Exception {
  Log.l("String_Node_Str" + ApplicationInfo.VERSION);
  secureManager=SecureManager.getInstance();
  server=vertx.createHttpServer();
  server.requestHandler(request -> {
    Log.l("String_Node_Str" + request.host());
    Buffer totalBuffer=Buffer.buffer();
    if (request.method() == HttpMethod.POST) {
      Log.l("String_Node_Str" + request.host());
      Log.l("String_Node_Str" + request.getHeader("String_Node_Str"));
      request.handler(buffer -> {
        totalBuffer.appendBuffer(buffer);
      }
);
      request.endHandler(v -> {
        Log.l("String_Node_Str" + totalBuffer);
        int command=Integer.parseInt(request.getHeader("String_Node_Str"));
        requestObject=new EasyJsonObject(totalBuffer.toString());
        response=request.response();
        response.putHeader("String_Node_Str","String_Node_Str");
        try {
          responseObject=ActionRegister.executeAction(new Sender(),command,requestObject);
          if (responseObject.containsKey("String_Node_Str")) {
            if (responseObject.getInt("String_Node_Str") == 200 || responseObject.getInt("String_Node_Str") == 1) {
              response.setStatusCode(200);
              Log.l("String_Node_Str");
            }
 else             if (responseObject.getInt("String_Node_Str") == 404 || responseObject.getInt("String_Node_Str") == 0) {
              response.setStatusCode(501);
              Log.l("String_Node_Str");
            }
 else             if (responseObject.getInt("String_Node_Str") == 500) {
              response.setStatusCode(500);
              Log.l("String_Node_Str");
            }
            responseObject.remove("String_Node_Str");
          }
 else {
            response.setStatusCode(200);
            Log.l("String_Node_Str");
          }
          Log.l("String_Node_Str" + responseObject.toString());
        }
 catch (        SQLException e) {
          response.setStatusCode(404);
          e.printStackTrace();
          Log.l("String_Node_Str");
        }
        response.end(responseObject.toString());
        response.close();
      }
);
    }
 else {
      response=request.response();
      response.putHeader("String_Node_Str","String_Node_Str");
      response.setStatusCode(405);
      response.end();
      response.close();
    }
  }
).listen(10419);
}

Fixed version (ground truth):
/** 
 * (non-Javadoc)
 * @see io.vertx.core.AbstractVerticle#start()
 */
@Override public void start() throws Exception {
  Log.l("String_Node_Str" + ApplicationInfo.VERSION);
  secureManager=SecureManager.getInstance();
  server=vertx.createHttpServer();
  server.requestHandler(request -> {
    Log.l("String_Node_Str" + request.host());
    Buffer totalBuffer=Buffer.buffer();
    if (request.method() == HttpMethod.POST) {
      Log.l("String_Node_Str" + request.host());
      Log.l("String_Node_Str" + request.getHeader("String_Node_Str"));
      request.handler(buffer -> {
        totalBuffer.appendBuffer(buffer);
      }
);
      request.endHandler(v -> {
        Log.l("String_Node_Str" + totalBuffer);
        int command=Integer.parseInt(request.getHeader("String_Node_Str"));
        requestObject=new EasyJsonObject(totalBuffer.toString());
        response=request.response();
        response.putHeader("String_Node_Str","String_Node_Str");
        try {
          Actionable.responseObject.clear();
          responseObject=ActionRegister.executeAction(new Sender(),command,requestObject);
          if (responseObject.containsKey("String_Node_Str")) {
            if (responseObject.getInt("String_Node_Str") == 200 || responseObject.getInt("String_Node_Str") == 1) {
              response.setStatusCode(200);
              Log.l("String_Node_Str");
            }
 else             if (responseObject.getInt("String_Node_Str") == 404 || responseObject.getInt("String_Node_Str") == 0) {
              response.setStatusCode(501);
              Log.l("String_Node_Str");
            }
 else             if (responseObject.getInt("String_Node_Str") == 500) {
              response.setStatusCode(500);
              Log.l("String_Node_Str");
            }
            responseObject.remove("String_Node_Str");
          }
 else {
            response.setStatusCode(200);
            Log.l("String_Node_Str");
          }
          Log.l("String_Node_Str" + responseObject.toString());
        }
 catch (        SQLException e) {
          response.setStatusCode(404);
          e.printStackTrace();
          Log.l("String_Node_Str");
        }
        response.end(responseObject.toString());
        response.close();
      }
);
    }
 else {
      response=request.response();
      response.putHeader("String_Node_Str","String_Node_Str");
      response.setStatusCode(405);
      response.end();
      response.close();
    }
  }
).listen(10419);
}