/**
   * TC11: Racing rename
   *
   * @throws IOException an exception might be thrown
   */
  public void testTC11() throws Exception {
    final Path p = new Path("/TC11/foo");
    System.out.println("p=" + p);

    // a. Create file and write one block of data. Close file.
    final int len1 = (int) BLOCK_SIZE;
    {
      FSDataOutputStream out = fs.create(p, false, buffersize, REPLICATION, BLOCK_SIZE);
      AppendTestUtil.write(out, 0, len1);
      out.close();
    }

    // b. Reopen file in "append" mode. Append half block of data.
    FSDataOutputStream out = fs.append(p);
    final int len2 = (int) BLOCK_SIZE / 2;
    AppendTestUtil.write(out, len1, len2);
    out.hflush();

    // c. Rename file to file.new.
    final Path pnew = new Path(p + ".new");
    assertTrue(fs.rename(p, pnew));

    // d. Close file handle that was opened in (b).
    try {
      out.close();
      fail("close() should throw an exception");
    } catch (Exception e) {
      AppendTestUtil.LOG.info("GOOD!", e);
    }

    // wait for the lease recovery
    cluster.setLeasePeriod(1000, 1000);
    AppendTestUtil.sleep(5000);

    // check block sizes
    final long len = fs.getFileStatus(pnew).getLen();
    final LocatedBlocks locatedblocks =
        fs.dfs.getNamenode().getBlockLocations(pnew.toString(), 0L, len);
    final int numblock = locatedblocks.locatedBlockCount();
    for (int i = 0; i < numblock; i++) {
      final LocatedBlock lb = locatedblocks.get(i);
      final Block blk = lb.getBlock();
      final long size = lb.getBlockSize();
      if (i < numblock - 1) {
        assertEquals(BLOCK_SIZE, size);
      }
      for (DatanodeInfo datanodeinfo : lb.getLocations()) {
        final DataNode dn = cluster.getDataNode(datanodeinfo.getIpcPort());
        final Block metainfo = dn.data.getStoredBlock(blk.getBlockId());
        assertEquals(size, metainfo.getNumBytes());
      }
    }
  }
  /**
   * TC7: Corrupted replicas are present.
   *
   * @throws IOException an exception might be thrown
   */
  public void testTC7() throws Exception {
    final short repl = 2;
    final Path p = new Path("/TC7/foo");
    System.out.println("p=" + p);

    // a. Create file with replication factor of 2. Write half block of data. Close file.
    final int len1 = (int) (BLOCK_SIZE / 2);
    {
      FSDataOutputStream out = fs.create(p, false, buffersize, repl, BLOCK_SIZE);
      AppendTestUtil.write(out, 0, len1);
      out.close();
    }
    DFSTestUtil.waitReplication(fs, p, repl);

    // b. Log into one datanode that has one replica of this block.
    //   Find the block file on this datanode and truncate it to zero size.
    final LocatedBlocks locatedblocks =
        fs.dfs.getNamenode().getBlockLocations(p.toString(), 0L, len1);
    assertEquals(1, locatedblocks.locatedBlockCount());
    final LocatedBlock lb = locatedblocks.get(0);
    final Block blk = lb.getBlock();
    assertEquals(len1, lb.getBlockSize());

    DatanodeInfo[] datanodeinfos = lb.getLocations();
    assertEquals(repl, datanodeinfos.length);
    final DataNode dn = cluster.getDataNode(datanodeinfos[0].getIpcPort());
    final FSDataset data = (FSDataset) dn.getFSDataset();
    final RandomAccessFile raf = new RandomAccessFile(data.getBlockFile(blk), "rw");
    AppendTestUtil.LOG.info("dn=" + dn + ", blk=" + blk + " (length=" + blk.getNumBytes() + ")");
    assertEquals(len1, raf.length());
    raf.setLength(0);
    raf.close();

    // c. Open file in "append mode".  Append a new block worth of data. Close file.
    final int len2 = (int) BLOCK_SIZE;
    {
      FSDataOutputStream out = fs.append(p);
      AppendTestUtil.write(out, len1, len2);
      out.close();
    }

    // d. Reopen file and read two blocks worth of data.
    AppendTestUtil.check(fs, p, len1 + len2);
  }
예제 #3
0
 /** Create a file with one block and corrupt some/all of the block replicas. */
 private void createAFileWithCorruptedBlockReplicas(
     Path filePath, short repl, int corruptBlockCount)
     throws IOException, AccessControlException, FileNotFoundException, UnresolvedLinkException,
         InterruptedException, TimeoutException {
   DFSTestUtil.createFile(dfs, filePath, BLOCK_SIZE, repl, 0);
   DFSTestUtil.waitReplication(dfs, filePath, repl);
   // Locate the file blocks by asking name node
   final LocatedBlocks locatedblocks =
       dfs.dfs.getNamenode().getBlockLocations(filePath.toString(), 0L, BLOCK_SIZE);
   Assert.assertEquals(repl, locatedblocks.get(0).getLocations().length);
   // The file only has one block
   LocatedBlock lblock = locatedblocks.get(0);
   DatanodeInfo[] datanodeinfos = lblock.getLocations();
   ExtendedBlock block = lblock.getBlock();
   // corrupt some /all of the block replicas
   for (int i = 0; i < corruptBlockCount; i++) {
     DatanodeInfo dninfo = datanodeinfos[i];
     final DataNode dn = cluster.getDataNode(dninfo.getIpcPort());
     corruptBlock(block, dn);
     LOG.debug("Corrupted block " + block.getBlockName() + " on data node " + dninfo);
   }
 }
  /**
   * The following test first creates a file with a few blocks. It randomly truncates the replica of
   * the last block stored in each datanode. Finally, it triggers block synchronization to
   * synchronize all stored block.
   */
  public void testBlockSynchronization() throws Exception {
    final int ORG_FILE_SIZE = 3000;
    Configuration conf = new HdfsConfiguration();
    conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
    MiniDFSCluster cluster = null;

    try {
      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(5).build();
      cluster.waitActive();

      // create a file
      DistributedFileSystem dfs = (DistributedFileSystem) cluster.getFileSystem();
      String filestr = "/foo";
      Path filepath = new Path(filestr);
      DFSTestUtil.createFile(dfs, filepath, ORG_FILE_SIZE, REPLICATION_NUM, 0L);
      assertTrue(dfs.exists(filepath));
      DFSTestUtil.waitReplication(dfs, filepath, REPLICATION_NUM);

      // get block info for the last block
      LocatedBlock locatedblock =
          TestInterDatanodeProtocol.getLastLocatedBlock(dfs.dfs.getNamenode(), filestr);
      DatanodeInfo[] datanodeinfos = locatedblock.getLocations();
      assertEquals(REPLICATION_NUM, datanodeinfos.length);

      // connect to data nodes
      DataNode[] datanodes = new DataNode[REPLICATION_NUM];
      for (int i = 0; i < REPLICATION_NUM; i++) {
        datanodes[i] = cluster.getDataNode(datanodeinfos[i].getIpcPort());
        assertTrue(datanodes[i] != null);
      }

      // verify Block Info
      ExtendedBlock lastblock = locatedblock.getBlock();
      DataNode.LOG.info("newblocks=" + lastblock);
      for (int i = 0; i < REPLICATION_NUM; i++) {
        checkMetaInfo(lastblock, datanodes[i]);
      }

      DataNode.LOG.info("dfs.dfs.clientName=" + dfs.dfs.clientName);
      cluster.getNameNodeRpc().append(filestr, dfs.dfs.clientName);

      // expire lease to trigger block recovery.
      waitLeaseRecovery(cluster);

      Block[] updatedmetainfo = new Block[REPLICATION_NUM];
      long oldSize = lastblock.getNumBytes();
      lastblock =
          TestInterDatanodeProtocol.getLastLocatedBlock(dfs.dfs.getNamenode(), filestr).getBlock();
      long currentGS = lastblock.getGenerationStamp();
      for (int i = 0; i < REPLICATION_NUM; i++) {
        updatedmetainfo[i] =
            DataNodeTestUtils.getFSDataset(datanodes[i])
                .getStoredBlock(lastblock.getBlockPoolId(), lastblock.getBlockId());
        assertEquals(lastblock.getBlockId(), updatedmetainfo[i].getBlockId());
        assertEquals(oldSize, updatedmetainfo[i].getNumBytes());
        assertEquals(currentGS, updatedmetainfo[i].getGenerationStamp());
      }

      // verify that lease recovery does not occur when namenode is in safemode
      System.out.println("Testing that lease recovery cannot happen during safemode.");
      filestr = "/foo.safemode";
      filepath = new Path(filestr);
      dfs.create(filepath, (short) 1);
      cluster.getNameNodeRpc().setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_ENTER);
      assertTrue(dfs.dfs.exists(filestr));
      DFSTestUtil.waitReplication(dfs, filepath, (short) 1);
      waitLeaseRecovery(cluster);
      // verify that we still cannot recover the lease
      LeaseManager lm = NameNodeAdapter.getLeaseManager(cluster.getNamesystem());
      assertTrue("Found " + lm.countLease() + " lease, expected 1", lm.countLease() == 1);
      cluster.getNameNodeRpc().setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_LEAVE);
    } finally {
      if (cluster != null) {
        cluster.shutdown();
      }
    }
  }
  /**
   * Create a file, write something, fsync but not close. Then change lease period and wait for
   * lease recovery. Finally, read the block directly from each Datanode and verify the content.
   */
  public void testLeaseExpireHardLimit() throws Exception {
    System.out.println("testLeaseExpireHardLimit start");
    final long leasePeriod = 1000;
    final int DATANODE_NUM = 3;

    Configuration conf = new Configuration();
    conf.setInt("heartbeat.recheck.interval", 1000);
    conf.setInt("dfs.heartbeat.interval", 1);

    // create cluster
    MiniDFSCluster cluster = new MiniDFSCluster(conf, DATANODE_NUM, true, null);
    DistributedFileSystem dfs = null;
    try {
      cluster.waitActive();
      dfs = (DistributedFileSystem) cluster.getFileSystem();

      // create a new file.
      final String f = DIR + "foo";
      final Path fpath = new Path(f);
      FSDataOutputStream out = TestFileCreation.createFile(dfs, fpath, DATANODE_NUM);
      out.write("something".getBytes());
      out.sync();
      int actualRepl =
          ((DFSClient.DFSOutputStream) (out.getWrappedStream())).getNumCurrentReplicas();
      assertTrue(
          f + " should be replicated to " + DATANODE_NUM + " datanodes.",
          actualRepl == DATANODE_NUM);

      // set the soft and hard limit to be 1 second so that the
      // namenode triggers lease recovery
      cluster.setLeasePeriod(leasePeriod, leasePeriod);
      // wait for the lease to expire
      try {
        Thread.sleep(5 * leasePeriod);
      } catch (InterruptedException e) {
      }

      LocatedBlocks locations = dfs.dfs.namenode.getBlockLocations(f, 0, Long.MAX_VALUE);
      assertEquals(1, locations.locatedBlockCount());
      LocatedBlock locatedblock = locations.getLocatedBlocks().get(0);
      int successcount = 0;
      for (DatanodeInfo datanodeinfo : locatedblock.getLocations()) {
        DataNode datanode = cluster.getDataNode(datanodeinfo.ipcPort);
        FSDataset dataset = (FSDataset) datanode.data;
        Block b = dataset.getStoredBlock(locatedblock.getBlock().getBlockId());
        File blockfile = dataset.findBlockFile(b.getBlockId());
        System.out.println("blockfile=" + blockfile);
        if (blockfile != null) {
          BufferedReader in = new BufferedReader(new FileReader(blockfile));
          assertEquals("something", in.readLine());
          in.close();
          successcount++;
        }
      }
      System.out.println("successcount=" + successcount);
      assertTrue(successcount > 0);
    } finally {
      IOUtils.closeStream(dfs);
      cluster.shutdown();
    }

    System.out.println("testLeaseExpireHardLimit successful");
  }
예제 #6
0
 /** Get a DataNode that serves our testBlock. */
 public DataNode getDataNode(LocatedBlock testBlock) {
   DatanodeInfo[] nodes = testBlock.getLocations();
   int ipcport = nodes[0].ipcPort;
   return cluster.getDataNode(ipcport);
 }