@Test
  public void acceptorCloseInformsOtherServersIfCacheIsNotClosed() throws Exception {
    acceptor1 = spy(createAcceptor());

    acceptor1.close();

    verify(acceptor1).notifyCacheMembersOfClose();
  }
If a CacheServer is stopped but the cache is still open we need to inform other members
of the cluster that the server component no longer exists. Partitioned Region bucket
advisors need to know about this event.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/tier/sockets/AcceptorImplIntegrationTest.java