@Parameters(name = "{index}: wal={0}")
  public static List<Object[]> params() {
    return Arrays.asList(new Object[] { FSHLogProvider.class },
      new Object[] { AsyncFSWALProvider.class });
  }
This testcase is used to ensure that the compaction marker will fail a compaction if the RS is
already dead. It can not eliminate FNFE when scanning but it does reduce the possibility a lot.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionInDeadRegionServer.java