Discarding transport error while using nodejs + socketio

Discarding transport error while using nodejs + socketio

I am building an android chat application. I am using nodejs at server end
and trying to implement android client for socketIO. First the client
echoes "hello" to the server and the server echoes it back to the client.
This works fine. Now there is a Button, which when pressed echoes the text
in the EditText to the server. Server is supposed to echo the text back to
the client. However, as soon as text is echoed to the server, I get
Discarding transport error at server end and nothing is echoed back.
Client is unable to echo anything further. What is wrong with the codes ?
Server
var http = require('http'),fs = require('fs');
var app = http.createServer(function (req, res) {
res.end();
}).listen(8000,
'127.0.0.1');
var io = require('socket.io').listen(app);
io.sockets.on('connection', function(socket) {
socket.on('echo', function(data) {
socket.emit('echoback', data);
});
});
Client
package com.jack.pri;
import java.net.MalformedURLException;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import io.socket.*;
public class MainActivity extends Activity {
private SocketIO socket;
private TextView tview;
private Button btn;
private EditText tt;
private String k;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tview=(TextView) findViewById(R.id.tv);
tt = (EditText) findViewById(R.id.et);
btn = (Button) findViewById(R.id.button1);
//socket = null;
try {
socket = new SocketIO("http://10.0.2.2:8000");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
socket.connect(new IOCallback() {
@Override
public void on(String event, IOAcknowledge ack, Object... args) {
if ("echoback".equals(event) && args.length > 0) {
tview.setText(""+args[0]);
Log.e("received",""+args[0]);
}
}
@Override
public void onMessage(JSONObject json, IOAcknowledge ack) {}
@Override
public void onMessage(String data, IOAcknowledge ack) {}
@Override
public void onError(SocketIOException socketIOException) {
socketIOException.printStackTrace();}
@Override
public void onDisconnect() {}
@Override
public void onConnect() {}
});
///
socket.emit("echo", "hello");
btn.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
k=tt.getText().toString();
socket.emit("echo", k);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
Errorlog at server end
debug - client authorized
info - handshake authorized kaHbMG-lFmuFtvkFGY2W
debug - setting request GET /socket.io/1/websocket/kaHbMG-lFmuFtvkFGY2W
debug - set heartbeat interval for client kaHbMG-lFmuFtvkFGY2W
debug - client authorized for
debug - websocket writing 1::
debug - websocket writing 5:::{"name":"echoback","args":["hello"]}
debug - emitting heartbeat for client kaHbMG-lFmuFtvkFGY2W
debug - websocket writing 2::
debug - set heartbeat timeout for client kaHbMG-lFmuFtvkFGY2W
debug - got heartbeat packet
debug - cleared heartbeat timeout for client kaHbMG-lFmuFtvkFGY2W
debug - set heartbeat interval for client kaHbMG-lFmuFtvkFGY2W
debug - websocket writing 5:::{"name":"echoback","args":["this is textbox
input text"]}
info - transport end (undefined)
debug - set close timeout for client kaHbMG-lFmuFtvkFGY2W
debug - cleared close timeout for client kaHbMG-lFmuFtvkFGY2W
debug - cleared heartbeat interval for client kaHbMG-lFmuFtvkFGY2W
debug - discarding transport