I'm developing a bluetooth messaging application which sends text messages between devices.
My problem is when I connect more than 2 devices. After sending some data between them (let us say 3 devices) I get this exception:

javax.bluetooth.BluetoothStateException: too mach concurent requests
at com.sun.kvem.jsr082.bluetooth.ServiceSearcher.start(ServiceSearcher.java:67)
at com.sun.kvem.jsr082.bluetooth.DiscoveryAgentImpl.searchServices(DiscoveryAgentImpl.java:226)
at javax.bluetooth.DiscoveryAgent.searchServices(DiscoveryAgent.java:259)
at BSearch.deviceDiscovered(BSearch.java:78)
at com.sun.kvem.jsr082.impl.bluetooth.BTDeviceDiscoverer.run(+268)

I get it at device inquiry... this means when the application tries to detect other devices.
This is the function that starts the inquiry:

public void startSearching() throws BluetoothStateException{
     System.out.println("before inquiry");
      LocalDevice localD = LocalDevice.getLocalDevice();
      DiscoveryAgent discoveryA = localD.getDiscoveryAgent();
      }catch(BluetoothStateException bse){         
      isSearching = true;
      System.out.println("dupa inquiry -- waiting");

This is the function that restarts the inquiry after 4 seconds:

public void serviceSearchCompleted(int transID, int respCode) {////////////////////////////////////////
        if(!isSearching && pendingSearches==0)

         try { Thread.sleep(4000); }
         catch (InterruptedException ie) {}

         if (isRunning == true)
                  try {
                      System.out.println("CONTINUAM CU CAUTAREA");
                       } catch (BluetoothStateException ex) {

The class implemets a DiscoveryListener and when I call 'startSearching()' the thread is stoped then started again.

My application searches for devices every 4 seconds (in a separate thread) and after that updates a List with the names of available devices in the area.

Please someone help on this exception... at least give me a good hint because I couldn't find the solution anywhere. Thanks.

Switch of all devices and switch on again.

No I cannot because that means I interrupt all users and when they join again.... the same thing, that exception. Users must stay connected. I use a refresh function for connection which works nice and I didn't got any exception but it's not detecting devices continously, it's only when I click refresh button.

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