private void createCacheVM0() {
    ds = getSystem();
    cache = CacheFactory.create(ds);

    AttributesFactory factory = new AttributesFactory();
    factory.setScope(Scope.DISTRIBUTED_ACK);
    factory.setDataPolicy(DataPolicy.REPLICATE);
    factory.setEarlyAck(true);
    DistributedSystem.setThreadsSocketPolicy(false);
    RegionAttributes attr = factory.create();

    region = cache.createRegion("map", attr);
  }
TRAC #33359: AssertionError thrown while processing
cache.DistributedClearOperation$ClearRegionMessage
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ClearRegionMessageAssertionRegressionTest.java