@Override
  public void memberSuspect(DistributionManager distributionManager, InternalDistributedMember id,
      InternalDistributedMember whoSuspected, String reason) {
    if (isSevereAlertProcessingEnabled()) {
      // if we're waiting for the member that initiated suspicion, we don't
      // want to be hasty about kicking it out of the distributed system
      synchronized (members) {
        int cells = members.length;
        for (InternalDistributedMember e : members) {
          if (e != null && e.equals(whoSuspected)) {
            severeAlertTimerReset = true;
          }
        }
      } // synchronized
    }
  }
Handle a {@link DSFIDNotFoundException} indicating a message type is not implemented on another
server (for example due to different product version). Default implementation logs the
exception as severe and moves on.

Rationale for default handling: New operations can have caused changes to other newer versioned
GFE JVMs that cannot be reverted. So ignoring exceptions is a conservative way considering such
scenarios. It will be upto individual messages to handle differently by overriding the above
method.
geode-core/src/main/java/org/apache/geode/distributed/internal/ReplyProcessor21.java