コード例 #1
0
  /** Test that that writes to an incomplete block are available to a reader */
  public void testUnfinishedBlockRead() throws IOException {
    // create a new file in the root, write data, do no close
    Path file1 = new Path("/unfinished-block");
    FSDataOutputStream stm = TestFileCreation.createFile(fileSystem, file1, 1);

    // write partial block and sync
    int partialBlockSize = blockSize / 2;
    writeFileAndSync(stm, partialBlockSize);

    // Make sure a client can read it before it is closed
    checkCanRead(fileSystem, file1, partialBlockSize);

    stm.close();
  }
コード例 #2
0
  /**
   * test case: if the BlockSender decides there is only one packet to send, the previous
   * computation of the pktSize based on transferToAllowed would result in too small a buffer to do
   * the buffer-copy needed for partial chunks.
   */
  public void testUnfinishedBlockPacketBufferOverrun() throws IOException {
    // check that / exists
    Path path = new Path("/");
    System.out.println("Path : \"" + path.toString() + "\"");

    // create a new file in the root, write data, do no close
    Path file1 = new Path("/unfinished-block");
    final FSDataOutputStream stm = TestFileCreation.createFile(fileSystem, file1, 1);

    // write partial block and sync
    final int bytesPerChecksum = conf.getInt("io.bytes.per.checksum", 512);
    final int partialBlockSize = bytesPerChecksum - 1;

    writeFileAndSync(stm, partialBlockSize);

    // Make sure a client can read it before it is closed
    checkCanRead(fileSystem, file1, partialBlockSize);

    stm.close();
  }