@Override
  public final void preTearDownCacheTestCase() {
    disconnectAllFromDS();
    HARegionQueue.setMessageSyncInterval(HARegionQueue.DEFAULT_MESSAGE_SYNC_INTERVAL);
    TestRegion = null;
  }
concurrency-control tests for client/server
geode-core/src/distributedTest/java/org/apache/geode/cache30/ClientServerCCEDUnitTest.java