IllegalMonitorStateException when closing streams

Question

Hi all,
The following code throws an illegalMonitorStateException. Anyone know what I need to do?
The documentatin says about an illegalMonitorStateException:
Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.
Do I need to notifyAll before closing?
     public void closeConnection () {
          try {
               ins.close();    // InputStream
               dins.close();   // DataInputStream
               outs.close();   // OutputStream
               douts.close();  // DataOutputStream
               connection.close();
          catch (IOException ioException) {
               displayMessage("IO Error", "Unable to close " +
                         "the connection (IOException: " +
                         ioException.getMessage() + ")");
          finally {
               isGameCompleted = true;
               notifyAll ();
               bpMIDlet.destroyApp(true);
     }Thanks in advance.
Maik

Answer 1

What you need is:
synchronized(this) {
      isGameCompleted = true;
      notifyAll ();
}You should always surrond either a set and notify or a test and wait with synchronization on the object you are notifying/waiting on.