@Before
  public void setup() {
    vm0 = VM.getVM(0);
    vm1 = VM.getVM(1);
    vm2 = VM.getVM(2);
    vm3 = VM.getVM(3);
  }
The port on which the cache server was started in this VM
geode-core/src/distributedTest/java/org/apache/geode/cache/ConnectionPoolDUnitTest.java