Java.io.IOException: Persistent connection dropped

Question

Hi all,
I am currently testing my midlet that uses a HTTP connection to link to a server using the emulator. However, I keep getting the following exception about a minute after the connection is established:
java.io.IOException: Persistent connection dropped after first chunk sent, cannot retry
at com.sun.midp.io.j2me.http.Protocol.sendRequest(+102)
at com.sun.midp.io.j2me.http.Protocol.sendRequest(+6)
at com.sun.midp.io.j2me.http.Protocol.closeOutputStream(+4 )
at com.sun.midp.io.BaseOutputStream.close(+14)
at java.io.DataOutputStream.close(+7)
at Conn.sendData(+25)
at Conn.doPost(+17)
at Conn.upload(+4)
at UploadThread.run(+7)
Here is the code for my sendData() method
public static void sendData( HttpConnection connection, String data ) throws IOException
     byte[ ] dataOut = data.getBytes();
     DataOutputStream os = connection.openDataOutputStream();
        try
          os.write( dataOut );
          os.flush();
     finally
          os.close();
}Any help or suggestions as to why I am getting this exception would be greatly appreciated.

Answer 1

Should i use a persistent connection and could you try to explain what the
exception actually means?I just thought that the connection may be dropped somehow (maybe a timeout) and it may be related to closing OutputStream you obtain from the connection.
Every time i send data i create a new thread that opens up a new connection
and sends the data and receives the response.
I does this as i am only sending and receiving very small amounts of data. I am thinking that there can be a better design for your application. Is it possible?
1. If you are using the same connection (i mean socket connection not output)
why do you close the OutputStream after sending each data. As far as i know flush does this already.
So why dont you close both the connection and the OutputStream when the job of your program ends.
2. If you are not using the same connection for each thread, (aagain) why dont you open and close both the connection and the OutputStream in your finally block of your thread?
Regards.