@Parameterized.Parameters
  public static List<Object[]> data() {
    //@formatter:off
    return Arrays.asList(new Object[][]{
        {"DC1", DataNodeConfigSourceType.INSTANCE_CONFIG, false},
        {"DC1", DataNodeConfigSourceType.PROPERTY_STORE, false},
        {"DC1, DC0", DataNodeConfigSourceType.INSTANCE_CONFIG, false},
        {"DC1, DC0", DataNodeConfigSourceType.PROPERTY_STORE, false},
        {"all", DataNodeConfigSourceType.INSTANCE_CONFIG, false},
        {"all", DataNodeConfigSourceType.PROPERTY_STORE, false},
        {"DC1", DataNodeConfigSourceType.INSTANCE_CONFIG, true},
        {"DC1", DataNodeConfigSourceType.PROPERTY_STORE, true}
    });
    //@formatter:on
  }
Shutdown all Zk servers before exit.
ambry-tools/src/integration-test/java/com/github/ambry/clustermap/HelixBootstrapUpgradeToolTest.java