@After
  public void tearDown() {
    for (VM vm : toArray(getController(), vm0, vm1)) {
      vm.invoke(() -> cacheRule.closeAndNullCache());
    }

    disconnectAllFromDS();
  }
The test case in this class requires that conserve-sockets=true in order for the connections to
be shared.
geode-core/src/distributedTest/java/org/apache/geode/internal/tcp/CloseConnectionTest.java