Databases
StackOverflow2013
Postsdbo
POserversocket.accept() method blocks even after connection is established
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POserversocket.accept() method blocks even after connection is established
    primarykey
    data
    text
    <p>server </p> <pre><code> public class Server { class ServerHelper implements Runnable { InputStream is; private InputStreamReader isr; private BufferedReader br; public ServerHelper(InputStream is) { this.is = is; isr = new InputStreamReader(is); br = new BufferedReader(isr); } private void display() throws IOException { String s = ""; System.out.print("client says : "); while ( ( s = br.readLine() ) != null ) { System.out.print(s + " "); } } @Override public void run() { try { display( ); } catch (IOException ex) { Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex); } } void start( ) throws Exception{ ServerSocket ss = new ServerSocket(5555); while (true) { System.out.println("waiting for conn.."); Socket accept = ss.accept();//code hangs over here and doesn't proceed ahead if( accept == null ) System.out.println("got null..."); System.out.println("got the client req..."); ServerHelper sh = new ServerHelper(accept.getInputStream()); Thread t = new Thread(sh); t.start(); } } public static void main(String[] args) { try { // TODO code application logic here new Server().start(); } catch (Exception ex) { Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex); } } </code></pre> <p>client </p> <pre><code>public class Client { void start( ) throws Exception{ System.out.println("enter window size "); Scanner sc = new Scanner(System.in); int wsize = sc.nextInt(); Socket s = new Socket("127.0.0.1", 5555); System.out.println("is connected .." + s.isConnected()); OutputStream outputStream = s.getOutputStream(); PrintWriter pw = new PrintWriter(outputStream); String c = "y"; int j = 0; do{ String se = ""; for (int i = 0; i &lt; wsize; i++) { j++; se = se + String.valueOf(j); } pw.println(se); pw.flush(); System.out.println("do u wanna send more....?(y|n)"); c = sc.next(); }while( c.equalsIgnoreCase("y") ); } public static void main(String[] args) { try { // TODO code application logic here new Client().start(); } catch (Exception ex) { Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); } } </code></pre> <p>}</p> <pre><code>Socket accept = ss.accept(); </code></pre> <p>here my code hangs up i know it is blocking io, but at the client side i did verify that whether client is connected or not but it is showing connected...whats the matter with accept() ? I code in similar manner for all my TCP applications but this is weird ..can any one help</p> <p>I have also added the ServerHelper code for those who want take a look at that class please..</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USzukes
    1. USzukes
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POserversocket.accept() method blocks even after connection is established
      1. USGianmarco
      1. VTFavorite
    1. COThat thread has no place else to block and no work to do, so you would expect it to be blocked in `accept` 99.99% of the time.
      singulars
      1. POserversocket.accept() method blocks even after connection is established
      1. USDavid Schwartz
    2. COThere are a number of bad practices in your code.... you are not properly closing the `outputStream` in your Client code... you should send the entire client Socket to the `ServerHelper`, not just the InputStream, etc. Not that this answers your issue though ....
      singulars
      1. POserversocket.accept() method blocks even after connection is established
      1. USrolfl
    3. COYou should check to see what interface(s) your ServerSocket is bound to, do a `System.out.println(ss.getInetAddress().toString())` before the 'accept' so that you can confirm it is listening on 127.0.0.1 ....
      singulars
      1. POserversocket.accept() method blocks even after connection is established
      1. USrolfl
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload