@Override
    public void endpointCrashed(Endpoint endpoint) {
      if (cancelCriterion.isCancelInProgress()) {
        return;
      }
      InternalClientMembership.notifyServerCrashed(endpoint.getLocation());
    }
Used by Endpoint only, when the reference count for this endpoint reaches 0
geode-core/src/main/java/org/apache/geode/cache/client/internal/EndpointManagerImpl.java