ServerSocket DataInput/OutputStream not working on s60 emulator

[LittleBigWam]

Hi

I am developing a client server app for probably a Nokia s60 device using serversocket connections. My code works on SE W950i emulator, it works on netbeans' default Sun emulator and it works on s40 emulator. But it does not work on s60 3rd ed fp1 emulator. Is there some known issue with serversocket or datastreams on the s60 emulator ?

thanks in advance.


E.G. Code

Server side...

server = new ServerSocket( 5000, MAX_CONNECTIONS );
...
client = server.accept();
...
input = new DataInputStream( client.getInputStream() );
output = new DataOutputStream( client.getOutputStream() );

// Hangs here
String s = input.readUTF();

client side...
sConn = (SocketConnection) Connector.open("socket://localhost:5000");

input = sConn.openDataInputStream();
output = sConn.openDataOutputStream();
....
// passes this without error
output.writeUTF("LoadRegDB");

The connection is accepted on the server but the datastream is not being read/passed between client and server for some reason.

any ideas ?

[LittleBigWam]

Further info... I downloaded/installed and tried the S60 2nd FP3 emulator/SDK and received the following error:

Connection failed
java.io.IOException: SymbianOS error = -34 : System:\nSystem error.
- com.symbian.util.NativeError.checkIO(), bci=17
- com.symbian.gcf.ConnectionEndPoint.checkError(), bci=19
- com.symbian.gcf.ConnectionEndPoint.open(), bci=133
- com.symbian.midp.io.protocol.socket.Protocol.openConnection(), bci=127
- com.symbian.gcf.ProtocolBase.openConnection(), bci=159
- com.symbian.gcf.GCFConnector.open(), bci=197
- javax.microedition.io.Connector.open(), bci=4
- javax.microedition.io.Connector.open(), bci=3
- javax.microedition.io.Connector.open(), bci=2
- ParkMobile.ParkMobileMidlet.initialize(), bci=13
- ParkMobile.ParkMobileMidlet.startApp(), bci=15
- javax.microedition.midlet.MIDletInvoker.invokeStartApp(), bci=1
- com.symbian.midp.runtime.MIDletScheduler.startMIDlet(), bci=26
- com.symbian.midp.runtime.MIDletScheduler.run(), bci=14

[bhanuchandar.k]

Hi ,
I think you have to configure your internet connection in your S60 Emulator. In the emulator are you able to browse any sites through your S60 inbuilt browser. check that first.

[LittleBigWam]

My s60 emulator is able to connect to the internet.
Also the serversocket is connecting both locally and remotely to a server but then the datainputstream and dataoutputstream is not working, it is sending the data but the server side is not receiving it. On all other emulators I have including s40 it is working.

I wonder if anyone else can help or has seen this. I guess I can try other stream types or an http connection and we may get an actual phone to test with - on the other hand may we switch Vendors at this rate ! This is valid Java code so should work out of the box. All seems a little bit flaky to be honest !

thanks

[LittleBigWam]

In case anyone else checks this thread.

This is now working - the key element being the need to flush
output stream after writing to it from the s60 side.