Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.DFSTestUtil

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      if (cluster != null) { cluster.shutdown(); }
    }
  }

  public void testFsckNonExistent() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 20, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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("HEALTHY"));
      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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      if (cluster != null) { cluster.shutdown(); }
    }
  }

  public void testFsckMove() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 5, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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("HEALTHY"));
     
      // Corrupt a block by deleting it
      String[] fileNames = util.getFileNames(topDir);
      DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost",
                                          cluster.getNameNodePort()), conf);
      String block = dfsClient.namenode.
                      getBlockLocations(fileNames[0], 0, Long.MAX_VALUE).
                      get(0).getBlock().getBlockName();
      File baseDir = new File(System.getProperty("test.build.data",
                                                 "build/test/data"),"dfs/data");
      for (int i=0; i<8; i++) {
        File blockFile = new File(baseDir, "data" +(i+1)+ "/current/" + block);
        if(blockFile.exists()) {
          assertTrue(blockFile.delete());
        }
      }

      // We excpect the filesystem to be corrupted
      outStr = runFsck(conf, 1, false, "/");
      while (!outStr.contains("CORRUPT")) {
        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("CORRUPT"));
     
      // Check to make sure we have healthy filesystem
      outStr = runFsck(conf, 0, true, "/");
      assertTrue(outStr.contains("HEALTHY"));
      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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      if (cluster != null) { cluster.shutdown(); }
    }
  }
 
  public void testFsckOpenFiles() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 4, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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("HEALTHY"));
      // 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("HEALTHY"));
      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("HEALTHY"));
      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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    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 Configuration();
      final long precision = 1L;
      conf.setLong("dfs.access.time.precision", precision);
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      fs = cluster.getFileSystem();
      final String fileName = "/srcdat";
      util.createFiles(fs, fileName);
      util.waitReplication(fs, fileName, (short)3);
      FileStatus[] stats = fs.listStatus(new Path(fileName));
      assertFalse(0==stats.length);
      final Path file = stats[0].getPath();
      long aTime = fs.getFileStatus(file).getAccessTime();
      Thread.sleep(2*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(conf, 0, false, null);
      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 Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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 */
  public void testFsckPermission() throws Exception {
    final DFSTestUtil util = new DFSTestUtil(getClass().getSimpleName(), 20, 3, 8*1024);
    final Configuration conf = new Configuration();
    conf.setLong("dfs.blockreport.intervalMsec", 10000L);

    MiniDFSCluster cluster = null;
    try {
      // Create a cluster with the current user, write some files
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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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    }
  }

  public void testFsckMoveAndDelete() throws Exception {
    final int NUM_MOVE_TRIES = 3;
    DFSTestUtil util = new DFSTestUtil("TestFsck", 5, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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);
      String corruptFileName = fileNames[0];
      String block = dfsClient.namenode.
                      getBlockLocations(fileNames[0], 0, Long.MAX_VALUE).
                      get(0).getBlock().getBlockName();
      File baseDir = new File(System.getProperty("test.build.data",
                                                 "build/test/data"),"dfs/data");
      for (int i=0; i<8; i++) {
        File blockFile = new File(baseDir, "data" +(i+1)+ "/current/" + block);
        if(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, "/");
      }
     
      // After a fsck -move, the corrupted file should still exist.
      for (int retry = 0; retry < NUM_MOVE_TRIES; retry++) {
        outStr = runFsck(conf, 1, true, "/", "-move" );
        assertTrue(outStr.contains(NamenodeFsck.CORRUPT_STATUS));
        String[] newFileNames = util.getFileNames(topDir);
        boolean found = false;
        for (String f : newFileNames) {
          if (f.equals(corruptFileName)) {
            found = true;
            break;
          }
        }
        assertTrue(found);
      }

      // Fix the filesystem by deleting corrupted files
      outStr = runFsck(conf, 1, true, "/", "-delete");
      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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      if (cluster != null) { cluster.shutdown(); }
    }
  }
 
  public void testFsckOpenFiles() throws Exception {
    DFSTestUtil util = new DFSTestUtil("TestFsck", 4, 3, 8*1024);
    MiniDFSCluster cluster = null;
    FileSystem fs = null;
    try {
      Configuration conf = new Configuration();
      conf.setLong("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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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    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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    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("dfs.blockreport.intervalMsec", 10000L);
      cluster = new MiniDFSCluster(conf, 4, true, null);
      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);
      String outStr = runFsck(conf, 0, true, "/");
      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(conf, 0, false, null);
      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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