Examples of org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo

org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo
Rolling upgrade information

    }
  }


  static void queryForPreparation(DistributedFileSystem dfs) throws IOException,
      InterruptedException {
    RollingUpgradeInfo info;
    int retries = 0;
    while (++retries < 10) {
      info = dfs.rollingUpgrade(RollingUpgradeAction.QUERY);
      if (info.createdRollbackImages()) {
        break;
      }
      Thread.sleep(1000);
    }

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    setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
    setRollingUpgradeInfo(true, startTime);
  }


  void setRollingUpgradeInfo(boolean createdRollbackImages, long startTime) {
    rollingUpgradeInfo = new RollingUpgradeInfo(blockPoolId,
        createdRollbackImages, startTime, 0L);
  }

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  @Override  // NameNodeMXBean
  public RollingUpgradeInfo.Bean getRollingUpgradeStatus() {
    readLock();
    try {
      RollingUpgradeInfo upgradeInfo = getRollingUpgradeInfo();
      if (upgradeInfo != null) {
        return new RollingUpgradeInfo.Bean(upgradeInfo);
      }
      return null;
    } finally {

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  RollingUpgradeInfo finalizeRollingUpgrade() throws IOException {
    checkSuperuserPrivilege();
    checkOperation(OperationCategory.WRITE);
    writeLock();
    final RollingUpgradeInfo returnInfo;
    try {
      checkOperation(OperationCategory.WRITE);
      checkNameNodeSafeMode("Failed to finalize rolling upgrade");


      returnInfo = finalizeRollingUpgradeInternal(now());
      getEditLog().logFinalizeRollingUpgrade(returnInfo.getFinalizeTime());
      getFSImage().saveNamespace(this);
      getFSImage().renameCheckpoint(NameNodeFile.IMAGE_ROLLBACK,
          NameNodeFile.IMAGE);
    } finally {
      writeUnlock();

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          "Failed to finalize rolling upgrade since there is no rolling upgrade in progress.");
    }


    final long startTime = rollingUpgradeInfo.getStartTime();
    rollingUpgradeInfo = null;
    return new RollingUpgradeInfo(blockPoolId, false, startTime, finalizeTime);
  }

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            +"\" to " + RollingUpgradeAction.class.getSimpleName());
      }


      System.out.println(action + " rolling upgrade ...");


      final RollingUpgradeInfo info = dfs.rollingUpgrade(action);
      switch(action){
      case QUERY:
        break;
      case PREPARE:
        Preconditions.checkState(info.isStarted());
        break;
      case FINALIZE:
        Preconditions.checkState(info.isFinalized());
        break;
      }
      printMessage(info, System.out);
      return 0;
    }

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