Program: 2124
Project: 2124
Buggy source:
@Override public void handleMessage(Message message){
  Object listener=getListener(message.arg2);
  boolean listenerRemove=true;
switch (message.what) {
case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED:
    mAsyncChannel.sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
  mConnected.countDown();
break;
case AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED:
break;
case AsyncChannel.CMD_CHANNEL_DISCONNECTED:
Log.e(TAG,"String_Node_Str");
break;
case DISCOVER_SERVICES_STARTED:
String s=((NsdServiceInfo)message.obj).getServiceType();
((DiscoveryListener)listener).onDiscoveryStarted(s);
listenerRemove=false;
break;
case DISCOVER_SERVICES_FAILED:
((DiscoveryListener)listener).onStartDiscoveryFailed(getNsdService(message.arg2).getServiceType(),message.arg1);
break;
case SERVICE_FOUND:
((DiscoveryListener)listener).onServiceFound((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case SERVICE_LOST:
((DiscoveryListener)listener).onServiceLost((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case STOP_DISCOVERY_FAILED:
((DiscoveryListener)listener).onStopDiscoveryFailed(getNsdService(message.arg2).getServiceType(),message.arg1);
break;
case STOP_DISCOVERY_SUCCEEDED:
((DiscoveryListener)listener).onDiscoveryStopped(getNsdService(message.arg2).getServiceType());
break;
case REGISTER_SERVICE_FAILED:
((RegistrationListener)listener).onRegistrationFailed(getNsdService(message.arg2),message.arg1);
break;
case REGISTER_SERVICE_SUCCEEDED:
((RegistrationListener)listener).onServiceRegistered((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case UNREGISTER_SERVICE_FAILED:
((RegistrationListener)listener).onUnregistrationFailed(getNsdService(message.arg2),message.arg1);
break;
case UNREGISTER_SERVICE_SUCCEEDED:
((RegistrationListener)listener).onServiceUnregistered(getNsdService(message.arg2));
break;
case RESOLVE_SERVICE_FAILED:
((ResolveListener)listener).onResolveFailed(getNsdService(message.arg2),message.arg1);
break;
case RESOLVE_SERVICE_SUCCEEDED:
((ResolveListener)listener).onServiceResolved((NsdServiceInfo)message.obj);
break;
default :
Log.d(TAG,"String_Node_Str" + message);
break;
}
if (listenerRemove) {
removeListener(message.arg2);
}
}

Fixed version (ground truth):
@Override public void handleMessage(Message message){
  Object listener=getListener(message.arg2);
  boolean listenerRemove=true;
switch (message.what) {
case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED:
    mAsyncChannel.sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
  break;
case AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED:
mConnected.countDown();
break;
case AsyncChannel.CMD_CHANNEL_DISCONNECTED:
Log.e(TAG,"String_Node_Str");
break;
case DISCOVER_SERVICES_STARTED:
String s=((NsdServiceInfo)message.obj).getServiceType();
((DiscoveryListener)listener).onDiscoveryStarted(s);
listenerRemove=false;
break;
case DISCOVER_SERVICES_FAILED:
((DiscoveryListener)listener).onStartDiscoveryFailed(getNsdService(message.arg2).getServiceType(),message.arg1);
break;
case SERVICE_FOUND:
((DiscoveryListener)listener).onServiceFound((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case SERVICE_LOST:
((DiscoveryListener)listener).onServiceLost((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case STOP_DISCOVERY_FAILED:
((DiscoveryListener)listener).onStopDiscoveryFailed(getNsdService(message.arg2).getServiceType(),message.arg1);
break;
case STOP_DISCOVERY_SUCCEEDED:
((DiscoveryListener)listener).onDiscoveryStopped(getNsdService(message.arg2).getServiceType());
break;
case REGISTER_SERVICE_FAILED:
((RegistrationListener)listener).onRegistrationFailed(getNsdService(message.arg2),message.arg1);
break;
case REGISTER_SERVICE_SUCCEEDED:
((RegistrationListener)listener).onServiceRegistered((NsdServiceInfo)message.obj);
listenerRemove=false;
break;
case UNREGISTER_SERVICE_FAILED:
((RegistrationListener)listener).onUnregistrationFailed(getNsdService(message.arg2),message.arg1);
break;
case UNREGISTER_SERVICE_SUCCEEDED:
((RegistrationListener)listener).onServiceUnregistered(getNsdService(message.arg2));
break;
case RESOLVE_SERVICE_FAILED:
((ResolveListener)listener).onResolveFailed(getNsdService(message.arg2),message.arg1);
break;
case RESOLVE_SERVICE_SUCCEEDED:
((ResolveListener)listener).onServiceResolved((NsdServiceInfo)message.obj);
break;
default :
Log.d(TAG,"String_Node_Str" + message);
break;
}
if (listenerRemove) {
removeListener(message.arg2);
}
}