[HADOOP-15742] Log if ipc backoff is enabled in CallQueueManager

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.1.1
• Fix Version/s: 3.2.0
• Target Version/s: 3.2.0
• Hadoop Flags: Reviewed
• Assignee: Ryan Wu
• Reporter: Yiqun Lin
• Created: 11/Sep/18 08:04
• Updated: 18/Sep/18 03:14
• Resolved: 18/Sep/18 03:12

Description

Currently we don't log the info of ipc backoff. It will look good to print this as well so that makes users know if we enable this.

  public CallQueueManager(Class<? extends BlockingQueue<E>> backingClass,
                          Class<? extends RpcScheduler> schedulerClass,
      boolean clientBackOffEnabled, int maxQueueSize, String namespace,
      Configuration conf) {
    int priorityLevels = parseNumLevels(namespace, conf);
    this.scheduler = createScheduler(schedulerClass, priorityLevels,
        namespace, conf);
    BlockingQueue<E> bq = createCallQueueInstance(backingClass,
        priorityLevels, maxQueueSize, namespace, conf);
    this.clientBackOffEnabled = clientBackOffEnabled;
    this.putRef = new AtomicReference<BlockingQueue<E>>(bq);
    this.takeRef = new AtomicReference<BlockingQueue<E>>(bq);
    LOG.info("Using callQueue: " + backingClass + " queueCapacity: " +
        maxQueueSize + " scheduler: " + schedulerClass);
  }