static UUID configureConnectionImpl(Configuration conf) {
      conf.setClass(ConnectionUtils.HBASE_CLIENT_CONNECTION_IMPL,
        ConfigurationCaptorConnection.class, Connection.class);

      final UUID uuid = UUID.randomUUID();
      conf.set(UUID_KEY, uuid.toString());
      return uuid;
    }
This test is to test the scenario happened in HBASE-6901. All files are bulk loaded and
excluded from minor compaction. Without the fix of HBASE-6901, an
ArrayIndexOutOfBoundsException will be thrown.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java