CODEWITHSUNDEEP
androidsockets
user268397
user268397

Reputation: 1927

BindException Address Already in Use

I'm having issues with my serverThreadProc() method. It throws a BindException whenever I run it. Thinking there might be an issue in the first two lines of the try block. Not sure what I'm doing wrong though. 

private void serverThreadProc() {
    while (!this.stopRequested) {
        Socket sessionSocket = null;
        try {
            serverSocket = new ServerSocket(serverPort);
            sessionSocket = this.serverSocket.accept();
            InetAddress sourceAddress = sessionSocket.getInetAddress();
            Log.i(LOG_TAG, "Accepted new incoming connection ... "
                    + sourceAddress.toString());
            if (clientMap.containsKey(sourceAddress)) {
                ClientProcessor legacyProcessor = clientMap
                        .get(sourceAddress);
                legacyProcessor.shutdown();
            }
            ClientProcessor processor = new ClientProcessor(sessionSocket);
            processor.start();
            clientMap.put(sourceAddress, processor);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

public int start() {
    try {
        this.serverSocket = new ServerSocket(0);
        this.serverPort = this.serverSocket.getLocalPort();
        Log.i(LOG_TAG, "Server " + serverName + " started at "
                + this.serverSocket.getLocalSocketAddress());
    } catch (IOException ex) {
        Log.i(LOG_TAG, ex.toString());
    }

    this.serverThread.start();
    return this.serverPort;
}

public void stop() {
    try {
        stopRequested = true;
        if (this.serverSocket) {
            this.serverSocket.close();
        }
    } catch (IOException ex) {
        Log.i(LOG_TAG, ex.toString());
    }

    Log.i(LOG_TAG, "The server " + this.serverName + " has been stopped.");
}

Here is the stack trace produced by the code:

01-11 05:51:53.472: I/ConnectActivity(2151): IP Address:0
01-11 05:51:53.492: I/ServiceServer(2151): Server Whooznear started at /0.0.0.0:35434
01-11 05:51:53.522: I/ConnectActivity(2151): Started at 35434
01-11 05:51:53.542: W/System.err(2151): java.net.BindException: Address already in use
01-11 05:51:53.542: W/System.err(2151):     at org.apache.harmony.luni.platform.OSNetworkSystem.bind(Native Method)
01-11 05:51:53.542: W/System.err(2151):     at dalvik.system.BlockGuard$WrappedNetworkSystem.bind(BlockGuard.java:275)
01-11 05:51:53.571: W/System.err(2151):     at org.apache.harmony.luni.net.PlainSocketImpl.bind(PlainSocketImpl.java:165)
01-11 05:51:53.571: W/System.err(2151):     at java.net.ServerSocket.<init>(ServerSocket.java:123)
01-11 05:51:53.592: W/System.err(2151):     at java.net.ServerSocket.<init>(ServerSocket.java:74)
01-11 05:51:53.592: W/System.err(2151):     at com.whooznear.android.ServiceServer.serverThreadProc(ServiceServer.java:63)
01-11 05:51:53.592: W/System.err(2151):     at com.whooznear.android.ServiceServer.access$0(ServiceServer.java:58)
01-11 05:51:53.611: W/System.err(2151):     at com.whooznear.android.ServiceServer$1.run(ServiceServer.java:53)

Upvotes: 3

Views: 6917

Answers (2)

Odobenus Rosmarus
Odobenus Rosmarus

Reputation: 5998

You create ServerSocket in the procedure start(), then you create new ServerSocket on the same port in the procedure serverThreadProc(). You have to close old one before you create new server socket. Or use another port.

Upvotes: 1

sonu thomas
sonu thomas

Reputation: 2161

Why are u using while in the method serverThreadProc()

Make the program simple.I think your code is a bit messy.

You may refer to basic socket examples

This may help you to simplify ur code for the task

Upvotes: 0

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