@Override
  public void memberCrashed(MembershipEvent event) {}
Invoked when a member has unexpectedly left the distributed system. Also invoked when a client
has unexpectedly disconnected from this process or when this process has unexpectedly
disconnected from a <code>CacheServer</code>.
geode-core/src/main/java/org/apache/geode/management/membership/UniversalMembershipListenerAdapter.java