Package org.apache.hadoop.hbase.util

Examples of org.apache.hadoop.hbase.util.RetryCounter

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   * @throws InterruptedException
   * @throws KeeperException
   */
  public void delete(String path, int version)
  throws InterruptedException, KeeperException {
    RetryCounter retryCounter = retryCounterFactory.create();
    boolean isRetry = false; // False for first attempt, true for all retries.
    while (true) {
      try {
        zk.delete(path, version);
        return;
      } catch (KeeperException e) {
        switch (e.code()) {
          case NONODE:
            if (isRetry) {
              LOG.info("Node " + path + " already deleted. Assuming that a " +
                  "previous attempt succeeded.");
              return;
            }
            LOG.warn("Node " + path + " already deleted, and this is not a " +
                     "retry");
            throw e;

          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper delete failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
      isRetry = true;
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public Stat exists(String path, Watcher watcher)
  throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        return zk.exists(path, watcher);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper exists failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public Stat exists(String path, boolean watch)
  throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        return zk.exists(path, watch);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper exists failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public List<String> getChildren(String path, Watcher watcher)
    throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        return zk.getChildren(path, watcher);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper getChildren failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public List<String> getChildren(String path, boolean watch)
  throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        return zk.getChildren(path, watch);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper getChildren failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public byte[] getData(String path, Watcher watcher, Stat stat)
  throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        byte[] revData = zk.getData(path, watcher, stat);      
        return this.removeMetaData(revData);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper getData failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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   * @throws KeeperException
   * @throws InterruptedException
   */
  public byte[] getData(String path, boolean watch, Stat stat)
  throws KeeperException, InterruptedException {
    RetryCounter retryCounter = retryCounterFactory.create();
    while (true) {
      try {
        byte[] revData = zk.getData(path, watch, stat);
        return this.removeMetaData(revData);
      } catch (KeeperException e) {
        switch (e.code()) {
          case CONNECTIONLOSS:
          case OPERATIONTIMEOUT:
            LOG.warn("Possibly transient ZooKeeper exception: " + e);
            if (!retryCounter.shouldRetry()) {
              LOG.error("ZooKeeper getData failed after "
                + retryCounter.getMaxRetries() + " retries");
              throw e;
            }
            break;

          default:
            throw e;
        }
      }
      retryCounter.sleepUntilNextRetry();
      retryCounter.useRetry();
    }
  }
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    LOG.debug("FirstRow=" + Bytes.toString(firstrow));
    long pause = getConfiguration().getLong(HConstants.HBASE_CLIENT_PAUSE,
      HConstants.DEFAULT_HBASE_CLIENT_PAUSE);
    int numRetries = getConfiguration().getInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
      HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER);
    RetryCounter retrier = new RetryCounter(numRetries+1, (int)pause, TimeUnit.MICROSECONDS);
    while(retrier.shouldRetry()) {
      int index = getMiniHBaseCluster().getServerWith(firstrow);
      if (index != -1) {
        return getMiniHBaseCluster().getRegionServerThreads().get(index).getRegionServer();
      }
      // Came back -1.  Region may not be online yet.  Sleep a while.
      retrier.sleepUntilNextRetry();
    }
    return null;
  }
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  public void delete(String path, int version)
  throws InterruptedException, KeeperException {
    TraceScope traceScope = null;
    try {
      traceScope = Trace.startSpan("RecoverableZookeeper.delete");
      RetryCounter retryCounter = retryCounterFactory.create();
      boolean isRetry = false; // False for first attempt, true for all retries.
      while (true) {
        try {
          zk.delete(path, version);
          return;
        } catch (KeeperException e) {
          switch (e.code()) {
            case NONODE:
              if (isRetry) {
                LOG.info("Node " + path + " already deleted. Assuming a " +
                    "previous attempt succeeded.");
                return;
              }
              LOG.warn("Node " + path + " already deleted, retry=" + isRetry);
              throw e;

            case CONNECTIONLOSS:
            case SESSIONEXPIRED:
            case OPERATIONTIMEOUT:
              retryOrThrow(retryCounter, e, "delete");
              break;

            default:
              throw e;
          }
        }
        retryCounter.sleepUntilNextRetry();
        retryCounter.useRetry();
        isRetry = true;
      }
    } finally {
      if (traceScope != null) traceScope.close();
    }
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  public Stat exists(String path, Watcher watcher)
  throws KeeperException, InterruptedException {
    TraceScope traceScope = null;
    try {
      traceScope = Trace.startSpan("RecoverableZookeeper.exists");
      RetryCounter retryCounter = retryCounterFactory.create();
      while (true) {
        try {
          return zk.exists(path, watcher);
        } catch (KeeperException e) {
          switch (e.code()) {
            case CONNECTIONLOSS:
            case SESSIONEXPIRED:
            case OPERATIONTIMEOUT:
              retryOrThrow(retryCounter, e, "exists");
              break;

            default:
              throw e;
          }
        }
        retryCounter.sleepUntilNextRetry();
        retryCounter.useRetry();
      }
    } finally {
      if (traceScope != null) traceScope.close();
    }
  }
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Related Classes of org.apache.hadoop.hbase.util.RetryCounter

  • com.alibaba.wasp.zookeeper.RecoverableZooKeeper
  • org.apache.hadoop.hbase.HBaseClusterManager
  • org.apache.hadoop.hbase.HBaseTestingUtility
  • org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper
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