Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.DFSTestUtil

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  public void testRestartDFS() throws Exception {
    final Configuration conf = new HdfsConfiguration();
    MiniDFSCluster cluster = null;
    FSNamesystem fsn = null;
    int numNamenodeDirs;
    DFSTestUtil files = new DFSTestUtil("TestRestartDFS", 200, 3, 8*1024);

    final String dir = "/srcdat";
    final Path rootpath = new Path("/");
    final Path dirpath = new Path(dir);

    long rootmtime;
    FileStatus rootstatus;
    FileStatus dirstatus;

    try {
      cluster = new MiniDFSCluster.Builder(conf).format(true)
          .numDataNodes(NUM_DATANODES).build();
      String[] nameNodeDirs = conf.getStrings(
          DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY, new String[] {});
      numNamenodeDirs = nameNodeDirs.length;
      assertTrue("failed to get number of Namenode StorageDirs",
          numNamenodeDirs != 0);
      FileSystem fs = cluster.getFileSystem();
      files.createFiles(fs, dir);

      rootmtime = fs.getFileStatus(rootpath).getModificationTime();
      rootstatus = fs.getFileStatus(dirpath);
      dirstatus = fs.getFileStatus(dirpath);

      fs.setOwner(rootpath, rootstatus.getOwner() + "_XXX", null);
      fs.setOwner(dirpath, null, dirstatus.getGroup() + "_XXX");
    } finally {
      if (cluster != null) { cluster.shutdown(); }
    }
    try {
      // Force the NN to save its images on startup so long as
      // there are any uncheckpointed txns
      conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_TXNS_KEY, 1);

      // Here we restart the MiniDFScluster without formatting namenode
      cluster = new MiniDFSCluster.Builder(conf).format(false)
          .numDataNodes(NUM_DATANODES).build();
      fsn = cluster.getNamesystem();
      FileSystem fs = cluster.getFileSystem();
      assertTrue("Filesystem corrupted after restart.",
                 files.checkFiles(fs, dir));

      final FileStatus newrootstatus = fs.getFileStatus(rootpath);
      assertEquals(rootmtime, newrootstatus.getModificationTime());
      assertEquals(rootstatus.getOwner() + "_XXX", newrootstatus.getOwner());
      assertEquals(rootstatus.getGroup(), newrootstatus.getGroup());

      final FileStatus newdirstatus = fs.getFileStatus(dirpath);
      assertEquals(dirstatus.getOwner(), newdirstatus.getOwner());
      assertEquals(dirstatus.getGroup() + "_XXX", newdirstatus.getGroup());
      rootmtime = fs.getFileStatus(rootpath).getModificationTime();

      final String checkAfterRestart = checkImages(fsn, numNamenodeDirs);
     
      // Modify the system and then perform saveNamespace
      files.cleanup(fs, dir);
      files.createFiles(fs, dir);
      fsn.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
      cluster.getNameNodeRpc().saveNamespace();
      final String checkAfterModify = checkImages(fsn, numNamenodeDirs);
      assertFalse("Modified namespace should change fsimage contents. " +
          "was: " + checkAfterRestart + " now: " + checkAfterModify,
          checkAfterRestart.equals(checkAfterModify));
      fsn.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
      files.cleanup(fs, dir);
    } finally {
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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    cluster.waitActive();
    FileSystem fs = cluster.getFileSystem();
    try {
      // test finalized replicas
      final String TopDir = "/test";
      DFSTestUtil util = new DFSTestUtil("TestCrcCorruption", 2, 3, 8*1024);
      util.createFiles(fs, TopDir, (short)3);
      util.waitReplication(fs, TopDir, (short)3);
      util.checkFiles(fs, TopDir);
      cluster.restartDataNodes();
      cluster.waitActive();
      util.checkFiles(fs, TopDir);
    } finally {
      cluster.shutdown();
    }
  }
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  }

  /** do fsck */
  @Test
  public void testFsck() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 20, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      final long precision = 1L;
      conf.setLong(DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECISION_KEY, precision);
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      fs = cluster.getFileSystem();
      final String fileName = "/srcdat";
      util.createFiles(fs, fileName);
      util.waitReplication(fs, fileName, (short)3);
      final Path file = new Path(fileName);
      long aTime = fs.getFileStatus(file).getAccessTime();
      Thread.sleep(precision);
      setupAuditLogs();
      String outStr = runFsck(conf, 0, true, "/");
      verifyAuditLogs();
      assertEquals(aTime, fs.getFileStatus(file).getAccessTime());
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      System.out.println(outStr);
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      cluster.shutdown();
     
      // restart the cluster; bring up namenode but not the data nodes
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).format(false).build();
      outStr = runFsck(conf, 1, true, "/");
      // expect the result is corrupt
      assertTrue(outStr.contains(NamenodeFsck.CORRUPT_STATUS));
      System.out.println(outStr);
     
      // bring up data nodes & cleanup cluster
      cluster.startDataNodes(conf, 4, true, null, null);
      cluster.waitActive();
      cluster.waitClusterUp();
      fs = cluster.getFileSystem();
      util.cleanup(fs, "/srcdat");
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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    assertNull("Unexpected event in audit log", reader.readLine());
  }
 
  @Test
  public void testFsckNonExistent() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 20, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      fs = cluster.getFileSystem();
      util.createFiles(fs, "/srcdat");
      util.waitReplication(fs, "/srcdat", (short)3);
      String outStr = runFsck(conf, 0, true, "/non-existent");
      assertEquals(-1, outStr.indexOf(NamenodeFsck.HEALTHY_STATUS));
      System.out.println(outStr);
      util.cleanup(fs, "/srcdat");
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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  }

  /** Test fsck with permission set on inodes */
  @Test
  public void testFsckPermission() throws Exception {
    final DFSTestUtil util = new DFSTestUtil(getClass().getSimpleName(), 20, 3, 8*1024);
    final Configuration conf = new HdfsConfiguration();
    conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);

    MiniDFSCluster cluster = null;
    try {
      // Create a cluster with the current user, write some files
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      final MiniDFSCluster c2 = cluster;
      final String dir = "/dfsck";
      final Path dirpath = new Path(dir);
      final FileSystem fs = c2.getFileSystem();

      util.createFiles(fs, dir);
      util.waitReplication(fs, dir, (short) 3);
      fs.setPermission(dirpath, new FsPermission((short) 0700));

      // run DFSck as another user, should fail with permission issue
      UserGroupInformation fakeUGI = UserGroupInformation.createUserForTesting(
          "ProbablyNotARealUserName", new String[] { "ShangriLa" });
      fakeUGI.doAs(new PrivilegedExceptionAction<Object>() {
        @Override
        public Object run() throws Exception {
          System.out.println(runFsck(conf, -1, true, dir));
          return null;
        }
      });
     
      // set permission and try DFSck again as the fake user, should succeed
      fs.setPermission(dirpath, new FsPermission((short) 0777));
      fakeUGI.doAs(new PrivilegedExceptionAction<Object>() {
        @Override
        public Object run() throws Exception {
          final String outStr = runFsck(conf, 0, true, dir);
          System.out.println(outStr);
          assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
          return null;
        }
      });

      util.cleanup(fs, dir);
    } finally {
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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    }
  }

  @Test
  public void testFsckMoveAndDelete() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 5, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      conf.setInt(DFSConfigKeys.DFS_DATANODE_DIRECTORYSCAN_INTERVAL_KEY, 1);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      String topDir = "/srcdat";
      fs = cluster.getFileSystem();
      cluster.waitActive();
      util.createFiles(fs, topDir);
      util.waitReplication(fs, topDir, (short)3);
      String outStr = runFsck(conf, 0, true, "/");
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
     
      // Corrupt a block by deleting it
      String[] fileNames = util.getFileNames(topDir);
      DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost",
                                          cluster.getNameNodePort()), conf);
      ExtendedBlock block = dfsClient.getNamenode().getBlockLocations(
          fileNames[0], 0, Long.MAX_VALUE).get(0).getBlock();
      for (int i=0; i<4; i++) {
        File blockFile = MiniDFSCluster.getBlockFile(i, block);
        if(blockFile != null && blockFile.exists()) {
          assertTrue(blockFile.delete());
        }
      }

      // We excpect the filesystem to be corrupted
      outStr = runFsck(conf, 1, false, "/");
      while (!outStr.contains(NamenodeFsck.CORRUPT_STATUS)) {
        try {
          Thread.sleep(100);
        } catch (InterruptedException ignore) {
        }
        outStr = runFsck(conf, 1, false, "/");
      }
     
      // Fix the filesystem by moving corrupted files to lost+found
      outStr = runFsck(conf, 1, true, "/", "-move");
      assertTrue(outStr.contains(NamenodeFsck.CORRUPT_STATUS));
     
      // Check to make sure we have healthy filesystem
      outStr = runFsck(conf, 0, true, "/");
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      util.cleanup(fs, topDir);
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      cluster.shutdown();
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
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    }
  }
 
  @Test
  public void testFsckOpenFiles() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 4, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      String topDir = "/srcdat";
      String randomString = "HADOOP  ";
      fs = cluster.getFileSystem();
      cluster.waitActive();
      util.createFiles(fs, topDir);
      util.waitReplication(fs, topDir, (short)3);
      String outStr = runFsck(conf, 0, true, "/");
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      // Open a file for writing and do not close for now
      Path openFile = new Path(topDir + "/openFile");
      FSDataOutputStream out = fs.create(openFile);
      int writeCount = 0;
      while (writeCount != 100) {
        out.write(randomString.getBytes());
        writeCount++;                 
      }
      // We expect the filesystem to be HEALTHY and show one open file
      outStr = runFsck(conf, 0, true, topDir);
      System.out.println(outStr);
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      assertFalse(outStr.contains("OPENFORWRITE"));
      // Use -openforwrite option to list open files
      outStr = runFsck(conf, 0, true, topDir, "-openforwrite");
      System.out.println(outStr);
      assertTrue(outStr.contains("OPENFORWRITE"));
      assertTrue(outStr.contains("openFile"));
      // Close the file
      out.close();
      // Now, fsck should show HEALTHY fs and should not show any open files
      outStr = runFsck(conf, 0, true, topDir);
      System.out.println(outStr);
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      assertFalse(outStr.contains("OPENFORWRITE"));
      util.cleanup(fs, topDir);
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      cluster.shutdown();
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
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    MiniDFSCluster cluster = null;
    try {
      cluster = new MiniDFSCluster.Builder(conf).build();
      cluster.waitActive();
      fs = cluster.getFileSystem();
      DFSTestUtil util = new DFSTestUtil("testGetCorruptFiles", 3, 1, 1024);
      util.createFiles(fs, "/corruptData", (short) 1);
      util.waitReplication(fs, "/corruptData", (short) 1);

      // String outStr = runFsck(conf, 0, true, "/corruptData", "-list-corruptfileblocks");
      String outStr = runFsck(conf, 0, false, "/corruptData", "-list-corruptfileblocks");
      System.out.println("1. good fsck out: " + outStr);
      assertTrue(outStr.contains("has 0 CORRUPT files"));
      // delete the blocks
      final String bpid = cluster.getNamesystem().getBlockPoolId();
      for (int i=0; i<4; i++) {
        for (int j=0; j<=1; j++) {
          File storageDir = cluster.getInstanceStorageDir(i, j);
          File data_dir = MiniDFSCluster.getFinalizedDir(storageDir, bpid);
          File[] blocks = data_dir.listFiles();
          if (blocks == null)
            continue;
 
          for (int idx = 0; idx < blocks.length; idx++) {
            if (!blocks[idx].getName().startsWith("blk_")) {
              continue;
            }
            assertTrue("Cannot remove file.", blocks[idx].delete());
          }
        }
      }

      // wait for the namenode to see the corruption
      final NamenodeProtocols namenode = cluster.getNameNodeRpc();
      CorruptFileBlocks corruptFileBlocks = namenode
          .listCorruptFileBlocks("/corruptData", null);
      int numCorrupt = corruptFileBlocks.getFiles().length;
      while (numCorrupt == 0) {
        Thread.sleep(1000);
        corruptFileBlocks = namenode
            .listCorruptFileBlocks("/corruptData", null);
        numCorrupt = corruptFileBlocks.getFiles().length;
      }
      outStr = runFsck(conf, -1, true, "/corruptData", "-list-corruptfileblocks");
      System.out.println("2. bad fsck out: " + outStr);
      assertTrue(outStr.contains("has 3 CORRUPT files"));

      // Do a listing on a dir which doesn't have any corrupt blocks and validate
      util.createFiles(fs, "/goodData");
      outStr = runFsck(conf, 0, true, "/goodData", "-list-corruptfileblocks");
      System.out.println("3. good fsck out: " + outStr);
      assertTrue(outStr.contains("has 0 CORRUPT files"));
      util.cleanup(fs,"/corruptData");
      util.cleanup(fs, "/goodData");
    } finally {
      if (cluster != null) {cluster.shutdown();}
    }
  }
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    return bStream.toString();
  }

  /** do fsck */
  public void testFsck() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 20, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      final long precision = 1L;
      conf.setLong(DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECISION_KEY, precision);
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      fs = cluster.getFileSystem();
      final String fileName = "/srcdat";
      util.createFiles(fs, fileName);
      util.waitReplication(fs, fileName, (short)3);
      final Path file = new Path(fileName);
      long aTime = fs.getFileStatus(file).getAccessTime();
      Thread.sleep(precision);
      setupAuditLogs();
      String outStr = runFsck(conf, 0, true, "/");
      verifyAuditLogs();
      assertEquals(aTime, fs.getFileStatus(file).getAccessTime());
      assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
      System.out.println(outStr);
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      cluster.shutdown();
     
      // restart the cluster; bring up namenode but not the data nodes
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).format(false).build();
      outStr = runFsck(conf, 1, true, "/");
      // expect the result is corrupt
      assertTrue(outStr.contains(NamenodeFsck.CORRUPT_STATUS));
      System.out.println(outStr);
     
      // bring up data nodes & cleanup cluster
      cluster.startDataNodes(conf, 4, true, null, null);
      cluster.waitActive();
      cluster.waitClusterUp();
      fs = cluster.getFileSystem();
      util.cleanup(fs, "/srcdat");
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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        fsckPattern.matcher(line).matches());
    assertNull("Unexpected event in audit log", reader.readLine());
  }
 
  public void testFsckNonExistent() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 20, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new HdfsConfiguration();
      conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
      fs = cluster.getFileSystem();
      util.createFiles(fs, "/srcdat");
      util.waitReplication(fs, "/srcdat", (short)3);
      String outStr = runFsck(conf, 0, true, "/non-existent");
      assertEquals(-1, outStr.indexOf(NamenodeFsck.HEALTHY_STATUS));
      System.out.println(outStr);
      util.cleanup(fs, "/srcdat");
    } finally {
      if (fs != null) {try{fs.close();} catch(Exception e){}}
      if (cluster != null) { cluster.shutdown(); }
    }
  }
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