private void createCache(Properties props) throws Exception {
    DistributedSystem ds = getSystem(props);
    ds.disconnect();
    ds = getSystem(props);
    assertNotNull(ds);
    cache = CacheFactory.create(ds);
    assertNotNull(cache);
  }
Verify that EventId is prapogated to server in case of region clear. It also checks that peer
nodes also get the same EventID.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/EventIDVerificationDUnitTest.java