@Test
  public void testClearMultiVM() {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);

    vm0.invoke(new CacheSerializableRunnable("put initial data") {
      @Override
      public void run2() throws CacheException {
        for (int i = 0; i < 10; i++) {
          region.put(i, Integer.toString(i));
        }
      }
    });

    vm0.invoke(new CacheSerializableRunnable("perform clear on region") {
      @Override
      public void run2() throws CacheException {
        region.clear();
      }
    });
  }
TRAC #33359: AssertionError thrown while processing
cache.DistributedClearOperation$ClearRegionMessage
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ClearRegionMessageAssertionRegressionTest.java