Q: how to refresh ble advertiser and ble scanner in android? my app is advertising and scanning using ble in android.it needs to do it in a loop of maybe 1 hour every day (probably less),but now ,for the testing I'm trying to make it work even more.
after some time I realized that it can't run eternally without having bugs.
I'm getting error numbers 2 and 4 (one for advertise and one for scan). 
before I can see the errors in the log ,there is always a line like:

01-26 19:59:09.509 D/BluetoothLeScanner: onClientRegistered() - status=133 clientIf=21

the number near clientIf is getting bigger all the time ,till the error,so my guess is that the scanner/advertiser is collecting data about the scanned/advertised devices. I saw some options for solutions,like waiting some time between the actions or making mBluetoothGatt.close();
the waiting didnt help,and my app is not using the gatt (I'm not making any pairing inside the app),so I thought maybe i'll initialize BluetoothLeScanner/BluetoothLeAdvertiser again, but it didn't prevent the number near clientIf to raise and of course the error occured again.
does anyone have any Idea how can I "zero" the number near clientIf ,or of course other way to prevent the errors from happening ? thanks !
the most relative question I read was this:
Android stops finding BLE devices: onClientRegistered() - status=133 clientIf=0
edit: here I will add the code of the ble.
this is the scan code:
public class StDataCentralBle {
    private static final String TAG = ScannerFragment.class.getSimpleName();
    private static final long SCAN_PERIOD = 15000;
    private BluetoothAdapter mBluetoothAdapter;
    public BluetoothLeScanner mBluetoothLeScanner;
    private ScanCallback mScanCallback;
    private Vector<String> ScanResultArray;//intended to replace the adapter
    private Context context;

private Handler mHandler;
//todo open this:
public StDataCentralBle(Context context){
    this.context=context;


public void setBluetoothAdapter(BluetoothAdapter btAdapter) {
    this.mBluetoothAdapter = btAdapter;
    mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
}
public void startScanning() {
    if (mScanCallback == null && mBluetoothAdapter!=null && mBluetoothAdapter.isEnabled()) {
        Log.d(TAG, "Starting Scanning");

        // Will stop the scanning after a set time.
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Log.v("ble_process","BT state is: "+mBluetoothAdapter.getScanMode());
                stopScanning();
            }
        }, SCAN_PERIOD);

        // Kick off a new scan.
        mScanCallback = new SampleScanCallback();
        mBluetoothLeScanner.startScan(buildScanFilters(), buildScanSettings(), mScanCallback);

        Toast.makeText(context, "started scan", Toast.LENGTH_SHORT).show();
    } else {
        Log.v("ble_process","didnt start scan");

    }
}

/**
 * Stop scanning for BLE Advertisements.
 */
public void stopScanning() {
    // Stop the scan, wipe the callback.
    if(mBluetoothLeScanner!=null && mBluetoothAdapter.isEnabled() && mBluetoothAdapter.getState()==21) {
        mBluetoothLeScanner.stopScan(mScanCallback);
        Log.v("ble_process", "stopping scanning");
    }
    mScanCallback = null;
    if(mBluetoothAdapter!=null)
        mBluetoothLeScanner=mBluetoothAdapter.getBluetoothLeScanner();
    Toast.makeText(context, "stoped scan", Toast.LENGTH_SHORT).show();
}
/**
 * Return a List of {@link ScanFilter} objects to filter by Service UUID.
 */
private List<ScanFilter> buildScanFilters() {
    List<ScanFilter> scanFilters = new ArrayList<>();

    ScanFilter.Builder builder = new ScanFilter.Builder();
    // Comment out the below line to see all BLE devices around you
    builder.setServiceUuid(Constants.Service_UUID);
    scanFilters.add(builder.build());

    return scanFilters;
}

/**
 * Return a {@link ScanSettings} object set to use low power (to preserve battery life).
 */
private ScanSettings buildScanSettings() {
    ScanSettings.Builder builder = new ScanSettings.Builder();
    builder.setScanMode(ScanSettings.SCAN_MODE_LOW_POWER);
    return builder.build();
}

/**
 * Custom ScanCallback object - adds to adapter on success, displays error on failure.
 */
private class SampleScanCallback extends ScanCallback {
    @Override
    public void onBatchScanResults(List<ScanResult> results) {
        super.onBatchScanResults(results);

        for (ScanResult result : results) {

        }

    }

    @Override
    public void onScanResult(int callbackType, ScanResult result) {
        super.onScanResult(callbackType, result);
        Log.v("onscanResult","onscanRes");
        Toast.makeText(context.getApplicationContext(), "scan resulted ! ", Toast.LENGTH_SHORT).show();
        //get the data from advertise:
        byte[] Service_Data_bytes=result.getScanRecord().getServiceData(Constants.Service_UUID);
        if(Service_Data_bytes!=null) {
            String Service_Data = new String(Service_Data_bytes);
            Log.v("scanRes:", Service_Data);

            createNewcross(result);
        }
    }
    public void createNewcross(ScanResult scanResult){
        Log.v("createNewcross ", "new cross " );
        byte[] Service_Data_bytes=scanResult.getScanRecord().getServiceData(Constants.Service_UUID);//gilad
        String Service_Data = new String(Service_Data_bytes);


        String other_user=Service_Data ;

    }

    @Override
    public void onScanFailed(int errorCode) {
        super.onScanFailed(errorCode);
        Log.v("ble_process","scan_failed_error_code: "+errorCode);
        Toast.makeText(context.getApplicationContext(), "scan failed! ", Toast.LENGTH_SHORT).show();

        }


    }

}
}

this is the code that operate the scanning:
public void start_central_ble(Context context){//scaning service
    Log.v("ble_process","start_central_ble");
    if (mBluetoothAdapter.isEnabled())
        central.setBluetoothAdapter(mBluetoothAdapter);
    central.startScanning();
}

the timer that operates it:
private class StartCentralTask extends TimerTask {
    Context ServiceContext;

    private StartCentralTask(Context context) {
        ServiceContext = context;
    }

    @Override
    public void run() {
        // run on another thread
        mHandler.post(new Runnable() {
            @Override
            public void run() {

                start_central_ble(ServiceContext);

            }
        });
    }
}

