@AfterClass
  public static void afterClass() throws Exception {
    TEST_UTIL.shutdownMiniCluster();
    fs.delete(rootDir, true);
    logFs.delete(walRootDir, true);
  }
Basic test for the WALPlayer M/R tool
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestWALPlayer.java