Package org.apache.hadoop.hdfs.tools

Examples of org.apache.hadoop.hdfs.tools.DFSAdmin$ClearQuotaCommand


    conf = new Configuration();
    conf.set("dfs.block.size", Integer.toString(BLOCK_SIZE));
    cluster = new MiniDFSCluster(conf, 3, true, null);
    cluster.waitActive();
    fs = cluster.getFileSystem();
    admin = new DFSAdmin(conf);
  }
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  public void finalizeCluster(Configuration conf) throws Exception {
    if (nameNode == null) {
      throw new IllegalStateException("Attempting to finalize "
                                      + "Namenode but it is not running");
    }
    ToolRunner.run(new DFSAdmin(conf), new String[] {"-finalizeUpgrade"});
  }
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      cluster = new MiniDFSCluster(conf, numDatanodes, false, null);
      cluster.waitActive();
      fs = (DistributedFileSystem)(cluster.getFileSystem());

      // Saving image without safe mode should fail
      DFSAdmin admin = new DFSAdmin(conf);
      String[] args = new String[]{"-saveNamespace"};
      try {
        admin.run(args);
      } catch(IOException eIO) {
        assertTrue(eIO.getLocalizedMessage().contains("Safe mode should be turned ON"));
      } catch(Exception e) {
        throw new IOException(e);
      }
      // create new file
      Path file = new Path("namespace.dat");
      writeFile(fs, file, replication);
      checkFile(fs, file, replication);
      // verify that the edits file is NOT empty
      Collection<File> editsDirs = cluster.getNameEditsDirs();
      for(File ed : editsDirs) {
        assertTrue(new File(ed, "current/edits").length() > Integer.SIZE/Byte.SIZE);
      }

      // Saving image in safe mode should succeed
      fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
      try {
        admin.run(args);
      } catch(Exception e) {
        throw new IOException(e);
      }
      // verify that the edits file is empty
      for(File ed : editsDirs) {
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    }
  }
   
  @Test
  public void testGroupMappingRefresh() throws Exception {
    DFSAdmin admin = new DFSAdmin(config);
    String [] args =  new String[]{"-refreshUserToGroupsMappings"};
    Groups groups = Groups.getUserToGroupsMappingService(config);
    String user = UserGroupInformation.getCurrentUser().getUserName();
    System.out.println("first attempt:");
    List<String> g1 = groups.getGroups(user);
    String [] str_groups = new String [g1.size()];
    g1.toArray(str_groups);
    System.out.println(Arrays.toString(str_groups));
   
    System.out.println("second attempt, should be same:");
    List<String> g2 = groups.getGroups(user);
    g2.toArray(str_groups);
    System.out.println(Arrays.toString(str_groups));
    for(int i=0; i<g2.size(); i++) {
      assertEquals("Should be same group ", g1.get(i), g2.get(i));
    }
    admin.run(args);
    System.out.println("third attempt(after refresh command), should be different:");
    List<String> g3 = groups.getGroups(user);
    g3.toArray(str_groups);
    System.out.println(Arrays.toString(str_groups));
    for(int i=0; i<g3.size(); i++) {
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    // so the server side will pick it up
    String rsrc = "testGroupMappingRefresh_rsrc.xml";
    addNewConfigResource(rsrc, userKeyGroups, "gr2", userKeyHosts, "127.0.0.1")

   
    DFSAdmin admin = new DFSAdmin(config);
    String [] args = new String[]{"-refreshSuperUserGroupsConfiguration"};
    //NameNode nn = cluster.getNameNode();
    //Configuration conf = new Configuration(config);
    //conf.set(userKeyGroups, "gr2"); // superuser can proxy for this group
    //admin.setConf(conf);
    admin.run(args);
   
    try {
      ProxyUsers.authorize(ugi2, "127.0.0.1", config);
      fail("second auth for " + ugi2.getShortUserName() + " should've failed ");
    } catch (AuthorizationException e) {
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    final MiniDFSCluster cluster = new MiniDFSCluster(conf, 2, true, null);
    final FileSystem fs = cluster.getFileSystem();
    assertTrue("Not a HDFS: "+fs.getUri(),
                fs instanceof DistributedFileSystem);
    final DistributedFileSystem dfs = (DistributedFileSystem)fs;
    DFSAdmin admin = new DFSAdmin(conf);
   
    try {
      final int fileLen = 1024;
      final short replication = 5;
      final long spaceQuota = fileLen * replication * 15 / 8;

      // 1: create a directory /test and set its quota to be 3
      final Path parent = new Path("/test");
      assertTrue(dfs.mkdirs(parent));
      String[] args = new String[]{"-setQuota", "3", parent.toString()};
      runCommand(admin, args, false);

      //try setting space quota with a 'binary prefix'
      runCommand(admin, false, "-setSpaceQuota", "2t", parent.toString());
      assertEquals(2L<<40, dfs.getContentSummary(parent).getSpaceQuota());
     
      // set diskspace quota to 10000
      runCommand(admin, false, "-setSpaceQuota",
                 Long.toString(spaceQuota), parent.toString());
     
      // 2: create directory /test/data0
      final Path childDir0 = new Path(parent, "data0");
      assertTrue(dfs.mkdirs(childDir0));

      // 3: create a file /test/datafile0
      final Path childFile0 = new Path(parent, "datafile0");
      DFSTestUtil.createFile(fs, childFile0, fileLen, replication, 0);
     
      // 4: count -q /test
      ContentSummary c = dfs.getContentSummary(parent);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 3);
      assertEquals(c.getQuota(), 3);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 5: count -q /test/data0
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 1);
      assertEquals(c.getQuota(), -1);
      // check disk space consumed
      c = dfs.getContentSummary(parent);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);

      // 6: create a directory /test/data1
      final Path childDir1 = new Path(parent, "data1");
      boolean hasException = false;
      try {
        assertFalse(dfs.mkdirs(childDir1));
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      OutputStream fout;
     
      // 7: create a file /test/datafile1
      final Path childFile1 = new Path(parent, "datafile1");
      hasException = false;
      try {
        fout = dfs.create(childFile1);
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      // 8: clear quota /test
      runCommand(admin, new String[]{"-clrQuota", parent.toString()}, false);
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 9: clear quota /test/data0
      runCommand(admin, new String[]{"-clrQuota", childDir0.toString()}, false);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getQuota(), -1);
     
      // 10: create a file /test/datafile1
      fout = dfs.create(childFile1, replication);
     
      // 10.s: but writing fileLen bytes should result in an quota exception
      hasException = false;
      try {
        fout.write(new byte[fileLen]);
        fout.close();
      } catch (DSQuotaExceededException e) {
        hasException = true;
        IOUtils.closeStream(fout);
      }
      assertTrue(hasException);
     
      //delete the file
      dfs.delete(childFile1, false);
     
      // 9.s: clear diskspace quota
      runCommand(admin, false, "-clrSpaceQuota", parent.toString());
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), -1);      
     
      // now creating childFile1 should succeed
      DFSTestUtil.createFile(dfs, childFile1, fileLen, replication, 0);
     
      // 11: set the quota of /test to be 1
      // HADOOP-5872 - we can set quota even if it is immediately violated
      args = new String[]{"-setQuota", "1", parent.toString()};
      runCommand(admin, args, false);
      runCommand(admin, false, "-setSpaceQuota"// for space quota
                 Integer.toString(fileLen), args[2]);
     
      // 12: set the quota of /test/data0 to be 1
      args = new String[]{"-setQuota", "1", childDir0.toString()};
      runCommand(admin, args, false);
     
      // 13: not able create a directory under data0
      hasException = false;
      try {
        assertFalse(dfs.mkdirs(new Path(childDir0, "in")));
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getDirectoryCount()+c.getFileCount(), 1);
      assertEquals(c.getQuota(), 1);
     
      // 14a: set quota on a non-existent directory
      Path nonExistentPath = new Path("/test1");
      assertFalse(dfs.exists(nonExistentPath));
      args = new String[]{"-setQuota", "1", nonExistentPath.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "1g", // for space quota
                 nonExistentPath.toString());
     
      // 14b: set quota on a file
      assertTrue(dfs.isFile(childFile0));
      args[1] = childFile0.toString();
      runCommand(admin, args, true);
      // same for space quota
      runCommand(admin, true, "-setSpaceQuota", "1t", args[1]);
     
      // 15a: clear quota on a file
      args[0] = "-clrQuota";
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 15b: clear quota on a non-existent directory
      args[1] = nonExistentPath.toString();
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 16a: set the quota of /test to be 0
      args = new String[]{"-setQuota", "0", parent.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "0", args[2]);
     
      // 16b: set the quota of /test to be -1
      args[1] = "-1";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16c: set the quota of /test to be Long.MAX_VALUE+1
      args[1] = String.valueOf(Long.MAX_VALUE+1L);
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16d: set the quota of /test to be a non integer
      args[1] = "33aa1.5";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16e: set space quota with a value larger than Long.MAX_VALUE
      runCommand(admin, true, "-setSpaceQuota",
                 (Long.MAX_VALUE/1024/1024 + 1024) + "m", args[2]);
     
      // 17:  setQuota by a non-administrator
      final String username = "userxx";
      UserGroupInformation ugi =
        UserGroupInformation.createUserForTesting(username,
                                                  new String[]{"groupyy"});
     
      final String[] args2 = args.clone(); // need final ref for doAs block
      ugi.doAs(new PrivilegedExceptionAction<Object>() {
        @Override
        public Object run() throws Exception {
          assertEquals("Not running as new user", username,
              UserGroupInformation.getCurrentUser().getShortUserName());
          DFSAdmin userAdmin = new DFSAdmin(conf);
         
          args2[1] = "100";
          runCommand(userAdmin, args2, true);
          runCommand(userAdmin, true, "-setSpaceQuota", "1g", args2[2]);
         
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   * @throws Exception
   */
  @Test (timeout = 30000)
  public void testInvalidShell() throws Exception {
    Configuration conf = new Configuration(); // default FS (non-DFS)
    DFSAdmin admin = new DFSAdmin();
    admin.setConf(conf);
    int res = admin.run(new String[] {"-refreshNodes"});
    assertEquals("expected to fail -1", res , -1);
  }
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    final MiniDFSCluster cluster = new MiniDFSCluster(conf, 2, true, null);
    final FileSystem fs = cluster.getFileSystem();
    assertTrue("Not a HDFS: "+fs.getUri(),
                fs instanceof DistributedFileSystem);
    final DistributedFileSystem dfs = (DistributedFileSystem)fs;
    DFSAdmin admin = new DFSAdmin(conf);
   
    try {
      final int fileLen = 1024;
      final short replication = 5;
      final long spaceQuota = fileLen * replication * 15 / 8;

      // 1: create a directory /test and set its quota to be 3
      final Path parent = new Path("/test");
      assertTrue(dfs.mkdirs(parent));
      String[] args = new String[]{"-setQuota", "3", parent.toString()};
      runCommand(admin, args, false);

      //try setting space quota with a 'binary prefix'
      runCommand(admin, false, "-setSpaceQuota", "2t", parent.toString());
      assertEquals(2L<<40, dfs.getContentSummary(parent).getSpaceQuota());
     
      // set diskspace quota to 10000
      runCommand(admin, false, "-setSpaceQuota",
                 Long.toString(spaceQuota), parent.toString());
     
      // 2: create directory /test/data0
      final Path childDir0 = new Path(parent, "data0");
      assertTrue(dfs.mkdirs(childDir0));

      // 3: create a file /test/datafile0
      final Path childFile0 = new Path(parent, "datafile0");
      DFSTestUtil.createFile(fs, childFile0, fileLen, replication, 0);
     
      // 4: count -q /test
      ContentSummary c = dfs.getContentSummary(parent);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 3);
      assertEquals(c.getQuota(), 3);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 5: count -q /test/data0
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 1);
      assertEquals(c.getQuota(), -1);
      // check disk space consumed
      c = dfs.getContentSummary(parent);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);

      // 6: create a directory /test/data1
      final Path childDir1 = new Path(parent, "data1");
      boolean hasException = false;
      try {
        assertFalse(dfs.mkdirs(childDir1));
      } catch (QuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      OutputStream fout;
     
      // 7: create a file /test/datafile1
      final Path childFile1 = new Path(parent, "datafile1");
      hasException = false;
      try {
        fout = dfs.create(childFile1);
      } catch (QuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      // 8: clear quota /test
      runCommand(admin, new String[]{"-clrQuota", parent.toString()}, false);
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 9: clear quota /test/data0
      runCommand(admin, new String[]{"-clrQuota", childDir0.toString()}, false);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getQuota(), -1);
     
      // 10: create a file /test/datafile1
      fout = dfs.create(childFile1, replication);
     
      // 10.s: but writing fileLen bytes should result in an quota exception
      hasException = false;
      try {
        fout.write(new byte[fileLen]);
        fout.close();
      } catch (QuotaExceededException e) {
        hasException = true;
        IOUtils.closeStream(fout);
      }
      assertTrue(hasException);
     
      //delete the file
      dfs.delete(childFile1, false);
     
      // 9.s: clear diskspace quota
      runCommand(admin, false, "-clrSpaceQuota", parent.toString());
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), -1);      
     
      // now creating childFile1 should succeed
      DFSTestUtil.createFile(dfs, childFile1, fileLen, replication, 0);
     
      // 11: set the quota of /test to be 1
      args = new String[]{"-setQuota", "1", parent.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota"// for space quota
                 Integer.toString(fileLen), args[2]);
     
      // 12: set the quota of /test/data0 to be 1
      args = new String[]{"-setQuota", "1", childDir0.toString()};
      runCommand(admin, args, false);
     
      // 13: not able create a directory under data0
      hasException = false;
      try {
        assertFalse(dfs.mkdirs(new Path(childDir0, "in")));
      } catch (QuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getDirectoryCount()+c.getFileCount(), 1);
      assertEquals(c.getQuota(), 1);
     
      // 14a: set quota on a non-existent directory
      Path nonExistentPath = new Path("/test1");
      assertFalse(dfs.exists(nonExistentPath));
      args = new String[]{"-setQuota", "1", nonExistentPath.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "1g", // for space quota
                 nonExistentPath.toString());
     
      // 14b: set quota on a file
      assertTrue(dfs.isFile(childFile0));
      args[1] = childFile0.toString();
      runCommand(admin, args, true);
      // same for space quota
      runCommand(admin, true, "-setSpaceQuota", "1t", args[1]);
     
      // 15a: clear quota on a file
      args[0] = "-clrQuota";
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 15b: clear quota on a non-existent directory
      args[1] = nonExistentPath.toString();
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 16a: set the quota of /test to be 0
      args = new String[]{"-setQuota", "0", parent.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "0", args[2]);
     
      // 16b: set the quota of /test to be -1
      args[1] = "-1";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16c: set the quota of /test to be Long.MAX_VALUE+1
      args[1] = String.valueOf(Long.MAX_VALUE+1L);
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16d: set the quota of /test to be a non integer
      args[1] = "33aa1.5";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16e: set space quota with a value larger than Long.MAX_VALUE
      runCommand(admin, true, "-setSpaceQuota",
                 (Long.MAX_VALUE/1024/1024 + 1024) + "m", args[2]);
     
      // 17:  setQuota by a non-administrator
      UnixUserGroupInformation.saveToConf(conf,
          UnixUserGroupInformation.UGI_PROPERTY_NAME,
          new UnixUserGroupInformation(new String[]{"userxx\n", "groupyy\n"}));
      DFSAdmin userAdmin = new DFSAdmin(conf);
      args[1] = "100";
      runCommand(userAdmin, args, true);
      runCommand(userAdmin, true, "-setSpaceQuota", "1g", args[2]);
     
      // 18: clrQuota by a non-administrator
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  public void finalizeCluster(Configuration conf) throws Exception {
    if (nameNode == null) {
      throw new IllegalStateException("Attempting to finalize "
                                      + "Namenode but it is not running");
    }
    ToolRunner.run(new DFSAdmin(conf), new String[] {"-finalizeUpgrade"});
  }
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    final MiniDFSCluster cluster = new MiniDFSCluster(conf, 2, true, null);
    final FileSystem fs = cluster.getFileSystem();
    assertTrue("Not a HDFS: "+fs.getUri(),
                fs instanceof DistributedFileSystem);
    final DistributedFileSystem dfs = (DistributedFileSystem)fs;
    DFSAdmin admin = new DFSAdmin(conf);
   
    try {
      final int fileLen = 1024;
      final short replication = 5;
      final long spaceQuota = fileLen * replication * 15 / 8;

      // 1: create a directory /test and set its quota to be 3
      final Path parent = new Path("/test");
      assertTrue(dfs.mkdirs(parent));
      String[] args = new String[]{"-setQuota", "3", parent.toString()};
      runCommand(admin, args, false);

      //try setting space quota with a 'binary prefix'
      runCommand(admin, false, "-setSpaceQuota", "2t", parent.toString());
      assertEquals(2L<<40, dfs.getContentSummary(parent).getSpaceQuota());
     
      // set diskspace quota to 10000
      runCommand(admin, false, "-setSpaceQuota",
                 Long.toString(spaceQuota), parent.toString());
     
      // 2: create directory /test/data0
      final Path childDir0 = new Path(parent, "data0");
      assertTrue(dfs.mkdirs(childDir0));

      // 3: create a file /test/datafile0
      final Path childFile0 = new Path(parent, "datafile0");
      DFSTestUtil.createFile(fs, childFile0, fileLen, replication, 0);
     
      // 4: count -q /test
      ContentSummary c = dfs.getContentSummary(parent);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 3);
      assertEquals(c.getQuota(), 3);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 5: count -q /test/data0
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getFileCount()+c.getDirectoryCount(), 1);
      assertEquals(c.getQuota(), -1);
      // check disk space consumed
      c = dfs.getContentSummary(parent);
      assertEquals(c.getSpaceConsumed(), fileLen*replication);

      // 6: create a directory /test/data1
      final Path childDir1 = new Path(parent, "data1");
      boolean hasException = false;
      try {
        assertFalse(dfs.mkdirs(childDir1));
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      OutputStream fout;
     
      // 7: create a file /test/datafile1
      final Path childFile1 = new Path(parent, "datafile1");
      hasException = false;
      try {
        fout = dfs.create(childFile1);
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
     
      // 8: clear quota /test
      runCommand(admin, new String[]{"-clrQuota", parent.toString()}, false);
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), spaceQuota);
     
      // 9: clear quota /test/data0
      runCommand(admin, new String[]{"-clrQuota", childDir0.toString()}, false);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getQuota(), -1);
     
      // 10: create a file /test/datafile1
      fout = dfs.create(childFile1, replication);
     
      // 10.s: but writing fileLen bytes should result in an quota exception
      hasException = false;
      try {
        fout.write(new byte[fileLen]);
        fout.close();
      } catch (DSQuotaExceededException e) {
        hasException = true;
        IOUtils.closeStream(fout);
      }
      assertTrue(hasException);
     
      //delete the file
      dfs.delete(childFile1, false);
     
      // 9.s: clear diskspace quota
      runCommand(admin, false, "-clrSpaceQuota", parent.toString());
      c = dfs.getContentSummary(parent);
      assertEquals(c.getQuota(), -1);
      assertEquals(c.getSpaceQuota(), -1);      
     
      // now creating childFile1 should succeed
      DFSTestUtil.createFile(dfs, childFile1, fileLen, replication, 0);
     
      // 11: set the quota of /test to be 1
      // HADOOP-5872 - we can set quota even if it is immediately violated
      args = new String[]{"-setQuota", "1", parent.toString()};
      runCommand(admin, args, false);
      runCommand(admin, false, "-setSpaceQuota"// for space quota
                 Integer.toString(fileLen), args[2]);
     
      // 12: set the quota of /test/data0 to be 1
      args = new String[]{"-setQuota", "1", childDir0.toString()};
      runCommand(admin, args, false);
     
      // 13: not able create a directory under data0
      hasException = false;
      try {
        assertFalse(dfs.mkdirs(new Path(childDir0, "in")));
      } catch (NSQuotaExceededException e) {
        hasException = true;
      }
      assertTrue(hasException);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getDirectoryCount()+c.getFileCount(), 1);
      assertEquals(c.getQuota(), 1);
     
      // 14a: set quota on a non-existent directory
      Path nonExistentPath = new Path("/test1");
      assertFalse(dfs.exists(nonExistentPath));
      args = new String[]{"-setQuota", "1", nonExistentPath.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "1g", // for space quota
                 nonExistentPath.toString());
     
      // 14b: set quota on a file
      assertTrue(dfs.isFile(childFile0));
      args[1] = childFile0.toString();
      runCommand(admin, args, true);
      // same for space quota
      runCommand(admin, true, "-setSpaceQuota", "1t", args[1]);
     
      // 15a: clear quota on a file
      args[0] = "-clrQuota";
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 15b: clear quota on a non-existent directory
      args[1] = nonExistentPath.toString();
      runCommand(admin, args, true);
      runCommand(admin, true, "-clrSpaceQuota", args[1]);
     
      // 16a: set the quota of /test to be 0
      args = new String[]{"-setQuota", "0", parent.toString()};
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", "0", args[2]);
     
      // 16b: set the quota of /test to be -1
      args[1] = "-1";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16c: set the quota of /test to be Long.MAX_VALUE+1
      args[1] = String.valueOf(Long.MAX_VALUE+1L);
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16d: set the quota of /test to be a non integer
      args[1] = "33aa1.5";
      runCommand(admin, args, true);
      runCommand(admin, true, "-setSpaceQuota", args[1], args[2]);
     
      // 16e: set space quota with a value larger than Long.MAX_VALUE
      runCommand(admin, true, "-setSpaceQuota",
                 (Long.MAX_VALUE/1024/1024 + 1024) + "m", args[2]);
     
      // 17:  setQuota by a non-administrator
      UnixUserGroupInformation.saveToConf(conf,
          UnixUserGroupInformation.UGI_PROPERTY_NAME,
          new UnixUserGroupInformation(new String[]{"userxx\n", "groupyy\n"}));
      DFSAdmin userAdmin = new DFSAdmin(conf);
      args[1] = "100";
      runCommand(userAdmin, args, true);
      runCommand(userAdmin, true, "-setSpaceQuota", "1g", args[2]);
     
      // 18: clrQuota by a non-administrator
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