Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.MiniDFSCluster.restartNameNode()

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      assertFalse(checkFile1(in1));
      // verify fetchBlockByteRange() fails (cached tokens become invalid)
      assertFalse(checkFile2(in3));

      // restart the namenode to allow DFSClient to re-fetch tokens
      cluster.restartNameNode();
      // verify blockSeekTo() works again (by transparently re-fetching
      // tokens from namenode)
      in1.seek(0);
      assertTrue(checkFile1(in1));
      in2.seekToNewSource(0);
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      LOG.info("Namenode has bad files. " + badFiles.size());
      assertTrue("Namenode has " + badFiles.size() + " bad files. Expecting 1.",
          badFiles.size() == 1);
      // restart namenode
      cluster.restartNameNode(0);
      fs = cluster.getFileSystem();

      // wait until replication queues have been initialized
      while (!cluster.getNameNode().namesystem.isPopulatingReplQueues()) {
        try {
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      LOG.info("Namenode has bad files. " + badFiles.size());
      assertTrue("Namenode has " + badFiles.size() + " bad files. Expecting 1.",
          badFiles.size() == 1);
      // restart namenode
      cluster.restartNameNode(0);
      fs = cluster.getFileSystem();

      try {
        Thread.sleep(1000);
      } catch (InterruptedException ignore) {
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          TEST_FILE_PATH, 6000, (short)1, 1L);
     
      cluster.getConfiguration(0).setInt(
          DFSConfigKeys.DFS_NAMENODE_SAFEMODE_EXTENSION_KEY, 60000);

      cluster.restartNameNode(0);
      NameNode nn = cluster.getNameNode(0);
     
      banner("Started in state 1.");
      assertTrue(nn.isStandbyState());
      assertTrue(nn.isInSafeMode());
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      cluster.getNameNode(0).getRpcServer().mkdirs("/test",
          FsPermission.createImmutable((short)0755), true);

      // Restarting the standby should not finalize any edits files
      // in the shared directory when it starts up!
      cluster.restartNameNode(1);
     
      assertEditFiles(cluster.getNameDirs(0),
          NNStorage.getInProgressEditsFileName(1));
      assertEditFiles(
          Collections.singletonList(cluster.getSharedEditsDir(0, 1)),
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      cluster.getNameNode(0).getRpcServer().mkdirs("/test2",
          FsPermission.createImmutable((short)0755), true);

      // If we restart NN0, it'll come back as standby, and we can
      // transition NN1 to active and make sure it reads edits correctly at this point.
      cluster.restartNameNode(0);
      cluster.transitionToActive(1);

      // NN1 should have both the edits that came before its restart, and the edits that
      // came after its restart.
      assertNotNull(NameNodeAdapter.getFileInfo(cluster.getNameNode(1), "/test", true));
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      assertTrue(fs.delete(new Path("/test1"), true));
      inodeCount -= 2; // test1 and file2 is deleted
      assertEquals(inodeCount, fsn.dir.getInodeMapSize());

      // Make sure editlog is loaded correctly
      cluster.restartNameNode();
      cluster.waitActive();
      fsn = cluster.getNamesystem();
      assertEquals(expectedLastInodeId, fsn.getLastInodeId());
      assertEquals(inodeCount, fsn.dir.getInodeMapSize());
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      fsn.leaveSafeMode();

      outStream.close();

      // The lastInodeId in fsimage should remain the same after reboot
      cluster.restartNameNode();
      cluster.waitActive();
      fsn = cluster.getNamesystem();
      assertEquals(expectedLastInodeId, fsn.getLastInodeId());
      assertEquals(inodeCount, fsn.dir.getInodeMapSize());
    } finally {
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    try {
      cluster = new MiniDFSCluster.Builder(config)
      .numDataNodes(numDatanodes).setupHostsFile(true).build();
      cluster.waitActive();
 
      cluster.restartNameNode();
      NamenodeProtocols nn = cluster.getNameNodeRpc();
      assertNotNull(nn);
      assertTrue(cluster.isDataNodeUp());
     
      DatanodeInfo[] info = nn.getDatanodeReport(DatanodeReportType.LIVE);
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      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);
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