private BatchBlockingQueue<ResponseInfo> getResponseQueue(int processorId) {
    return responseMap.computeIfAbsent(processorId, p -> new BatchBlockingQueue<>(WAKEUP_MARKER));
  }
@return the response list corresponding to a processor id.
@param processorId the processor id to match.
ambry-network/src/main/java/com/github/ambry/network/LocalRequestResponseChannel.java