@Subscribe
  @AllowConcurrentEvents
  public void handleServiceComponentRecoveryChangedEvent(ServiceComponentRecoveryChangedEvent event) {
    invalidateRecoveryTimestamp(event.getClusterName(), null);
  }
Recovery enabled was turned on or off.
@param event
ambari-server/src/main/java/org/apache/ambari/server/agent/RecoveryConfigHelper.java