@Override
    protected boolean initialChore() {
      if (numberOfFailures < failureThreshold) {
        numberOfFailures++;
        return false;
      } else {
        return true;
      }
    }
@param failThreshold Number of times the Chore fails when trying to execute initialChore
                     before succeeding.
hbase-common/src/test/java/org/apache/hadoop/hbase/TestChoreService.java