@Override
    public void run() {
      try {
        action.perform();
      } catch (Exception ex) {
        LOG.warn(
          "Exception occurred during performing action: " + StringUtils.stringifyException(ex));
      }
    }
Chaos Monkey policy that will run two different actions at the same time. A random action from
each array of actions will be chosen and then run in parallel.
hbase-it/src/test/java/org/apache/hadoop/hbase/chaos/policies/TwoConcurrentActionPolicy.java