Getting "failed to start accepting connection" while deploying my app into bluemix

Hi Am facing "failed to start accepting connection" error while pushing or deploying my app to bluemix. Can any help me in that.... my code snippet as given below:

var express     = require('express');
app         = express();
var ibmbluemix  = require('ibmbluemix') 
var ibmdb = require('ibm_db');
var http = require('http');
var url = require('url');
var logger = ibmbluemix.getLogger();
var PORT = (process.env.VCAP_APP_PORT || 8000);
var HOST = (process.env.VCAP_APP_HOST || 'localhost');
var queryData = null;
var serviceName = 'SQLDB';

if (process.env.VCAP_SERVICES) {
   var env = JSON.parse(process.env.VCAP_SERVICES);
db2 = env['sqldb'][0].credentials;
 }
 else{
      console.error("INFORMATION FOR DB CONNECTION NOT FOUND");
     }

var dbConnection = "DRIVER={DB2};DATABASE=" + db2.db + ";UID=" +  db2.username + ";PWD=" + db2.password + ";HOSTNAME=" + db2.hostname +  ";port=" + db2.port;
console.log("Connection String: " + dbConnection);

http.createServer(function(request, response) {
     console.log('Creating the http server');
     ibmdb.open(dbConnection, function(err, conn) {
        if (err ) {
         response.send("error occurred " + err.message);
        }
        else {
            console.log('before select');
            conn.query("SELECT FULL_NAME,  PASSWORD,  SHORT_ID FROM USER02130.USER_DETAILS", function(err,  rows, moreResultSets) 
{
  console.log('Connection result error '+err);
            console.log('no of records is '+rows.length);
            response.writeHead(200, { 'Content-Type': 'application/json'});
            response.write(JSON.stringify(rows));
            response.end();

    } );
}
}).listen(PORT, HOST);

Can anyone help me in this, Thanks in advance