Builder keyBuilder = accessor.keyBuilder();
String instanceName = "localhost_12918";
HelixProperty value = accessor.getProperty(keyBuilder.instanceConfig(instanceName));
value._record.setSimpleField("" + System.currentTimeMillis(), "newValue");
listener._instanceConfigChanged = false;
accessor.setProperty(keyBuilder.instanceConfig(instanceName), value);
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._instanceConfigChanged,
"Should get instanceConfig callback invoked since we change instanceConfig");
value = accessor.getProperty(keyBuilder.clusterConfig());