@Before
  public void setUp() {
    if (cache == null) {
      Properties dsProps = new Properties();
      dsProps.setProperty(MCAST_PORT, "0");

      // Connect to a DS and create a Cache.
      sys = DistributedSystem.connect(dsProps);
      cache = CacheFactory.create(sys);
    }
  }
Supports running test in two standalone VMs for debugging purposes. Start one VM with the
argument "far" to only host data. Start the second VM with no arg or "near" to run the test in.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/PRConcurrentMapOpsJUnitTest.java