Package org.apache.hadoop.hdfs.protocol

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

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      dfsCluster.transitionToActive(0);
      DistributedFileSystem dfs = dfsCluster.getFileSystem(0);

      // start rolling upgrade
      RollingUpgradeInfo info = dfs
          .rollingUpgrade(RollingUpgradeAction.PREPARE);
      Assert.assertTrue(info.isStarted());

      queryForPreparation(dfs);

      dfs.mkdirs(foo);
      long txid = dfs.rollEdits();
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    }
  }

  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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      final Path foo = new Path("/foo");
      final Path bar = new Path("/bar");
      final Path baz = new Path("/baz");

      final RollingUpgradeInfo info1;
      {
        final DistributedFileSystem dfs = cluster.getFileSystem();
        dfs.mkdirs(foo);
 
        //start rolling upgrade
        dfs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
        info1 = dfs.rollingUpgrade(RollingUpgradeAction.PREPARE);
        dfs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
        LOG.info("START\n" + info1);

        //query rolling upgrade
        Assert.assertEquals(info1, dfs.rollingUpgrade(RollingUpgradeAction.QUERY));
 
        dfs.mkdirs(bar);
        cluster.shutdown();
      }

      // cluster2 takes over QJM
      final Configuration conf2 = setConf(new Configuration(), nn2Dir, mjc);
      cluster2 = new MiniDFSCluster.Builder(conf2)
        .numDataNodes(0)
        .format(false)
        .manageNameDfsDirs(false)
        .build();
      final DistributedFileSystem dfs2 = cluster2.getFileSystem();
     
      // Check that cluster2 sees the edits made on cluster1
      Assert.assertTrue(dfs2.exists(foo));
      Assert.assertTrue(dfs2.exists(bar));
      Assert.assertFalse(dfs2.exists(baz));

      //query rolling upgrade in cluster2
      Assert.assertEquals(info1, dfs2.rollingUpgrade(RollingUpgradeAction.QUERY));

      dfs2.mkdirs(baz);

      LOG.info("RESTART cluster 2");
      cluster2.restartNameNode();
      Assert.assertEquals(info1, dfs2.rollingUpgrade(RollingUpgradeAction.QUERY));
      Assert.assertTrue(dfs2.exists(foo));
      Assert.assertTrue(dfs2.exists(bar));
      Assert.assertTrue(dfs2.exists(baz));

      //restart cluster with -upgrade should fail.
      try {
        cluster2.restartNameNode("-upgrade");
      } catch(IOException e) {
        LOG.info("The exception is expected.", e);
      }

      LOG.info("RESTART cluster 2 again");
      cluster2.restartNameNode();
      Assert.assertEquals(info1, dfs2.rollingUpgrade(RollingUpgradeAction.QUERY));
      Assert.assertTrue(dfs2.exists(foo));
      Assert.assertTrue(dfs2.exists(bar));
      Assert.assertTrue(dfs2.exists(baz));

      //finalize rolling upgrade
      final RollingUpgradeInfo finalize = dfs2.rollingUpgrade(RollingUpgradeAction.FINALIZE);
      LOG.info("FINALIZE: " + finalize);
      Assert.assertEquals(info1.getStartTime(), finalize.getStartTime());

      LOG.info("RESTART cluster 2 with regular startup option");
      cluster2.getNameNodeInfos()[0].setStartOpt(StartupOption.REGULAR);
      cluster2.restartNameNode();
      Assert.assertTrue(dfs2.exists(foo));
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      dfs.mkdirs(foo);

      FSImage fsimage = dfsCluster.getNamesystem(0).getFSImage();

      // start rolling upgrade
      RollingUpgradeInfo info = dfs
          .rollingUpgrade(RollingUpgradeAction.PREPARE);
      Assert.assertTrue(info.isStarted());
      dfs.mkdirs(bar);

      queryForPreparation(dfs);

      // The NN should have a copy of the fsimage in case of rollbacks.
      Assert.assertTrue(fsimage.hasRollbackFSImage());

      info = dfs.rollingUpgrade(RollingUpgradeAction.FINALIZE);
      Assert.assertTrue(info.isFinalized());
      Assert.assertTrue(dfs.exists(foo));

      // Once finalized, there should be no more fsimage for rollbacks.
      Assert.assertFalse(fsimage.hasRollbackFSImage());
    } finally {
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      DistributedFileSystem dfs = dfsCluster.getFileSystem(0);

      dfsCluster.shutdownNameNode(1);

      // start rolling upgrade
      RollingUpgradeInfo info = dfs
          .rollingUpgrade(RollingUpgradeAction.PREPARE);
      Assert.assertTrue(info.isStarted());

      info = dfs.rollingUpgrade(RollingUpgradeAction.QUERY);
      Assert.assertFalse(info.createdRollbackImages());

      dfsCluster.restartNameNode(1);

      queryForPreparation(dfs);
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      dfsCluster.transitionToActive(0);
      DistributedFileSystem dfs = dfsCluster.getFileSystem(0);

      // start rolling upgrade
      RollingUpgradeInfo info = dfs
          .rollingUpgrade(RollingUpgradeAction.PREPARE);
      Assert.assertTrue(info.isStarted());

      queryForPreparation(dfs);

      dfs.mkdirs(foo);
      long txid = dfs.rollEdits();
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    }
  }

  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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        .build();
  }

  public static RollingUpgradeInfo convert(RollingUpgradeInfoProto proto) {
    RollingUpgradeStatusProto status = proto.getStatus();
    return new RollingUpgradeInfo(status.getBlockPoolId(),
        proto.getCreatedRollbackImages(),
        proto.getStartTime(), proto.getFinalizeTime());
  }
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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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