@Subscribe
  @AllowConcurrentEvents
  public void handleClusterEnvConfigChangedEvent(ClusterConfigChangedEvent event) {
    if (StringUtils.equals(event.getConfigType(), ConfigHelper.CLUSTER_ENV)) {
      invalidateRecoveryTimestamp(event.getClusterName(), null);
    }
  }
Cluster-env configuration changed.
@param event
ambari-server/src/main/java/org/apache/ambari/server/agent/RecoveryConfigHelper.java