Package org.apache.hadoop.hdfs.qjournal

Examples of org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster

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  }
 
  @Test
  public void testRollbackWithJournalNodes() throws IOException,
      URISyntaxException {
    MiniQJMHACluster qjCluster = null;
    FileSystem fs = null;
    try {
      Builder builder = new MiniQJMHACluster.Builder(conf);
      builder.getDfsBuilder()
          .numDataNodes(0);
      qjCluster = builder.build();

      MiniDFSCluster cluster = qjCluster.getDfsCluster();
     
      // No upgrade is in progress at the moment.
      checkClusterPreviousDirExistence(cluster, false);
      assertCTimesEqual(cluster);
      checkJnPreviousDirExistence(qjCluster, false);
     
      // Transition NN0 to active and do some FS ops.
      cluster.transitionToActive(0);
      fs = HATestUtil.configureFailoverFs(cluster, conf);
      assertTrue(fs.mkdirs(new Path("/foo1")));
     
      // Do the upgrade. Shut down NN1 and then restart NN0 with the upgrade
      // flag.
      cluster.shutdownNameNode(1);
      cluster.getNameNodeInfos()[0].setStartOpt(StartupOption.UPGRADE);
      cluster.restartNameNode(0, false);
     
      checkNnPreviousDirExistence(cluster, 0, true);
      checkNnPreviousDirExistence(cluster, 1, false);
      checkJnPreviousDirExistence(qjCluster, true);
     
      // NN0 should come up in the active state when given the -upgrade option,
      // so no need to transition it to active.
      assertTrue(fs.mkdirs(new Path("/foo2")));
     
      // Now bootstrap the standby with the upgraded info.
      int rc = BootstrapStandby.run(
          new String[]{"-force"},
          cluster.getConfiguration(1));
      assertEquals(0, rc);
     
      cluster.restartNameNode(1);
     
      checkNnPreviousDirExistence(cluster, 0, true);
      checkNnPreviousDirExistence(cluster, 1, false);
      checkJnPreviousDirExistence(qjCluster, true);
      assertCTimesEqual(cluster);
     
      // Shut down the NNs, but deliberately leave the JNs up and running.
      Collection<URI> nn1NameDirs = cluster.getNameDirs(0);
      cluster.shutdown();

      conf.setStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY, Joiner.on(",").join(nn1NameDirs));
      NameNode.doRollback(conf, false);

      // The rollback operation should have rolled back the first NN's local
      // dirs, and the shared dir, but not the other NN's dirs. Those have to be
      // done by bootstrapping the standby.
      checkNnPreviousDirExistence(cluster, 0, false);
      checkJnPreviousDirExistence(qjCluster, false);
    } finally {
      if (fs != null) {
        fs.close();
      }
      if (qjCluster != null) {
        qjCluster.shutdown();
      }
    }
  }
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public class TestRollingUpgradeDowngrade {

  @Test(timeout = 300000)
  public void testDowngrade() throws Exception {
    final Configuration conf = new HdfsConfiguration();
    MiniQJMHACluster cluster = null;
    final Path foo = new Path("/foo");
    final Path bar = new Path("/bar");

    try {
      cluster = new MiniQJMHACluster.Builder(conf).build();
      MiniDFSCluster dfsCluster = cluster.getDfsCluster();
      dfsCluster.waitActive();

      // let NN1 tail editlog every 1s
      dfsCluster.getConfiguration(1).setInt(
          DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
      dfsCluster.restartNameNode(1);

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

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

      TestRollingUpgrade.queryForPreparation(dfs);
      dfs.close();

      dfsCluster.restartNameNode(0, true, "-rollingUpgrade", "downgrade");
      // Once downgraded, there should be no more fsimage for rollbacks.
      Assert.assertFalse(dfsCluster.getNamesystem(0).getFSImage()
          .hasRollbackFSImage());
      // shutdown NN1
      dfsCluster.shutdownNameNode(1);
      dfsCluster.transitionToActive(0);

      dfs = dfsCluster.getFileSystem(0);
      Assert.assertTrue(dfs.exists(foo));
      Assert.assertTrue(dfs.exists(bar));
    } finally {
      if (cluster != null) {
        cluster.shutdown();
      }
    }
  }
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  }

  @Test (timeout = 300000)
  public void testFinalize() throws Exception {
    final Configuration conf = new HdfsConfiguration();
    MiniQJMHACluster cluster = null;
    final Path foo = new Path("/foo");
    final Path bar = new Path("/bar");

    try {
      cluster = new MiniQJMHACluster.Builder(conf).build();
      MiniDFSCluster dfsCluster = cluster.getDfsCluster();
      dfsCluster.waitActive();

      // let NN1 tail editlog every 1s
      dfsCluster.getConfiguration(1).setInt(
          DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
      dfsCluster.restartNameNode(1);

      dfsCluster.transitionToActive(0);
      DistributedFileSystem dfs = dfsCluster.getFileSystem(0);
      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 {
      if (cluster != null) {
        cluster.shutdown();
      }
    }
  }
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  }

  @Test (timeout = 300000)
  public void testQuery() throws Exception {
    final Configuration conf = new Configuration();
    MiniQJMHACluster cluster = null;
    try {
      cluster = new MiniQJMHACluster.Builder(conf).build();
      MiniDFSCluster dfsCluster = cluster.getDfsCluster();
      dfsCluster.waitActive();

      dfsCluster.transitionToActive(0);
      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);

      // The NN should have a copy of the fsimage in case of rollbacks.
      Assert.assertTrue(dfsCluster.getNamesystem(0).getFSImage()
          .hasRollbackFSImage());
    } finally {
      if (cluster != null) {
        cluster.shutdown();
      }
    }
  }
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  public void testCheckpoint() throws IOException, InterruptedException {
    final Configuration conf = new Configuration();
    conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
    conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_PERIOD_KEY, 1);

    MiniQJMHACluster cluster = null;
    final Path foo = new Path("/foo");

    try {
      cluster = new MiniQJMHACluster.Builder(conf).build();
      MiniDFSCluster dfsCluster = cluster.getDfsCluster();
      dfsCluster.waitActive();

      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();
      Assert.assertTrue(txid > 0);

      int retries = 0;
      while (++retries < 5) {
        NNStorage storage = dfsCluster.getNamesystem(1).getFSImage()
            .getStorage();
        if (storage.getFsImageName(txid - 1) != null) {
          return;
        }
        Thread.sleep(1000);
      }
      Assert.fail("new checkpoint does not exist");

    } finally {
      if (cluster != null) {
        cluster.shutdown();
      }
    }
  }
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Related Classes of org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster

  • org.apache.hadoop.conf.Configuration
  • org.apache.hadoop.hdfs.MiniDFSNNTopology
  • org.apache.hadoop.hdfs.server.namenode.ha.TestDFSUpgradeWithHA
  • org.apache.hadoop.hdfs.TestRollingUpgrade
  • org.apache.hadoop.hdfs.TestRollingUpgradeDowngrade
  • org.apache.hadoop.hdfs.TestRollingUpgradeRollback
  • java.net.URI
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