Пример #1
0
  /** Test to check that a DN goes down when all its volumes have failed. */
  @Test
  public void testShutdown() throws Exception {
    if (System.getProperty("os.name").startsWith("Windows")) {
      /**
       * This test depends on OS not allowing file creations on a directory that does not have write
       * permissions for the user. Apparently it is not the case on Windows (at least under Cygwin),
       * and possibly AIX. This is disabled on Windows.
       */
      return;
    }
    // Bring up two more datanodes
    cluster.startDataNodes(conf, 2, true, null, null);
    cluster.waitActive();
    final int dnIndex = 0;
    String bpid = cluster.getNamesystem().getBlockPoolId();
    File storageDir = cluster.getInstanceStorageDir(dnIndex, 0);
    File dir1 = MiniDFSCluster.getRbwDir(storageDir, bpid);
    storageDir = cluster.getInstanceStorageDir(dnIndex, 1);
    File dir2 = MiniDFSCluster.getRbwDir(storageDir, bpid);
    try {
      // make the data directory of the first datanode to be readonly
      assertTrue("Couldn't chmod local vol", dir1.setReadOnly());
      assertTrue("Couldn't chmod local vol", dir2.setReadOnly());

      // create files and make sure that first datanode will be down
      DataNode dn = cluster.getDataNodes().get(dnIndex);
      for (int i = 0; dn.isDatanodeUp(); i++) {
        Path fileName = new Path("/test.txt" + i);
        DFSTestUtil.createFile(fs, fileName, 1024, (short) 2, 1L);
        DFSTestUtil.waitReplication(fs, fileName, (short) 2);
        fs.delete(fileName, true);
      }
    } finally {
      // restore its old permission
      FileUtil.setWritable(dir1, true);
      FileUtil.setWritable(dir2, true);
    }
  }
Пример #2
0
  /**
   * Test that when there is a failure replicating a block the temporary and meta files are cleaned
   * up and subsequent replication succeeds.
   */
  @Test
  public void testReplicationError() throws Exception {
    // create a file of replication factor of 1
    final Path fileName = new Path("/test.txt");
    final int fileLen = 1;
    DFSTestUtil.createFile(fs, fileName, 1, (short) 1, 1L);
    DFSTestUtil.waitReplication(fs, fileName, (short) 1);

    // get the block belonged to the created file
    LocatedBlocks blocks =
        NameNodeAdapter.getBlockLocations(
            cluster.getNameNode(), fileName.toString(), 0, (long) fileLen);
    assertEquals("Should only find 1 block", blocks.locatedBlockCount(), 1);
    LocatedBlock block = blocks.get(0);

    // bring up a second datanode
    cluster.startDataNodes(conf, 1, true, null, null);
    cluster.waitActive();
    final int sndNode = 1;
    DataNode datanode = cluster.getDataNodes().get(sndNode);

    // replicate the block to the second datanode
    InetSocketAddress target = datanode.getXferAddress();
    Socket s = new Socket(target.getAddress(), target.getPort());
    // write the header.
    DataOutputStream out = new DataOutputStream(s.getOutputStream());

    DataChecksum checksum = DataChecksum.newDataChecksum(DataChecksum.Type.CRC32, 512);
    new Sender(out)
        .writeBlock(
            block.getBlock(),
            StorageType.DEFAULT,
            BlockTokenSecretManager.DUMMY_TOKEN,
            "",
            new DatanodeInfo[0],
            new StorageType[0],
            null,
            BlockConstructionStage.PIPELINE_SETUP_CREATE,
            1,
            0L,
            0L,
            0L,
            checksum,
            CachingStrategy.newDefaultStrategy(),
            false);
    out.flush();

    // close the connection before sending the content of the block
    out.close();

    // the temporary block & meta files should be deleted
    String bpid = cluster.getNamesystem().getBlockPoolId();
    File storageDir = cluster.getInstanceStorageDir(sndNode, 0);
    File dir1 = MiniDFSCluster.getRbwDir(storageDir, bpid);
    storageDir = cluster.getInstanceStorageDir(sndNode, 1);
    File dir2 = MiniDFSCluster.getRbwDir(storageDir, bpid);
    while (dir1.listFiles().length != 0 || dir2.listFiles().length != 0) {
      Thread.sleep(100);
    }

    // then increase the file's replication factor
    fs.setReplication(fileName, (short) 2);
    // replication should succeed
    DFSTestUtil.waitReplication(fs, fileName, (short) 1);

    // clean up the file
    fs.delete(fileName, false);
  }