Make cntr increase in MessageDumper thread-safe
Make cntr increase in MessageDumper thread-safe

hsnlab/escape,5GExchange/escape,5GExchange/escape,hsnlab/escape,5GExchange/escape,hsnlab/escape,5GExchange/escape,hsnlab/escape,hsnlab/escape,5GExchange/escape,hsnlab/escape,5GExchange/escape