code: public void incrementRetryCount(String clientId)
  	{
  		Integer retryCount = this.retryCounts.get(clientId);
  		this.retryCounts.put(clientId, retryCount == null ? 1 : retryCount + 1);
  	}
docs: Increments the number of successive retry attempts made by a client.
  @param clientId id of the client retrying a failed operation