public void enableSevereAlertProcessing() {
    severeAlertEnabled = true;
  }
Enables severe alert processing in this reply processor, if it has also been enabled in the
distribution config. Severe alerts are issued if acks are not received within
ack-wait-threshold plus ack-severe-alert-threshold seconds.
geode-core/src/main/java/org/apache/geode/distributed/internal/ReplyProcessor21.java