// OK
}
config = tool.getInstanceConfig(clusterName, "host1_9999");
AssertJUnit.assertEquals(config.getId(), "host1_9999");
tool.dropInstance(clusterName, config);
try
{
tool.getInstanceConfig(clusterName, "host1_9999");
Assert.fail("should fail if get a non-existent instance");
} catch (HelixException e)