Java SocketException Broken pipe

Question

I am doing a client to server Log-in communication.

I met a java.net.SocketException: broke Pipe at Server end. And I have narrowed the problem to one single line at the client end. If I move a position for this line, the code works. plese see the following code.

Client End:

    Socket socket = new Socket(Const.destIp, 12101);
    ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
    out.writeObject(this.message);              
    out.close();//Line that cause problem   
    ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
    ServerToClientLogin msg = (ServerToClientLogin) in.readObject();
    //out.close();//move it to here, problem solved
    in.close();
    socket.close();

Server end:

   while (true) {
     socket = _serverSocket.accept();
     in = new ObjectInputStream(socket.getInputStream());
     msg = (ClientToServerLogin) in.readObject();

     ServerToClientLogin msgToSend = null;
     out = new ObjectOutputStream(socket.getOutputStream());
     msgToSend = handleLoginRequest(msg);
     if(msgToSend != null) out.writeObject(msgToSend);

     try { in.close(); } catch (IOException e) {e.printStackTrace();}
     try { out.close();} catch (IOException e) {e.printStackTrace(); }
     try { socket.close();} catch (IOException e) {e.printStackTrace();}

}

Since readObject and writeObject are blocking call, I have no idea why close it earlier would case such problem.

acdcjunior · Accepted Answer · 2013-05-05 05:51:48Z

1

out.close();: Closes this (out) output stream and releases any system resources associated with this stream.

See the API here.

edited May 5, 2013 at 5:51

acdcjunior

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answered May 5, 2013 at 4:09

PbxMan

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4 Comments

SDEZero Over a year ago

out is of type ObjectOutputStream, calling out.close() would close its socket?

PbxMan Over a year ago

Closes this output stream and releases any system resources associated with this stream, that's in the API

acdcjunior Over a year ago

@PbxMan add what you said to the answer, it'll make it clearer.

user207421 Over a year ago

@PbxMan For clarity, yes it closes the socket, also its input stream. Closing any one of those three closes the other two.

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