@Test
public void testZKReconnect() throws Exception {
final AtomicReference<ZkServer> zkServerRef = new AtomicReference<ZkServer>();
final int zkPort = TestHelper.getRandomPort();
final String zkAddr = String.format("localhost:%d", zkPort);
ZkServer zkServer = TestHelper.startZkServer(zkAddr);
zkServerRef.set(zkServer);
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String clusterName = className + "_" + methodName;
// Setup cluster
LOG.info("Setup clusters");
ClusterSetup clusterSetup = new ClusterSetup(zkAddr);
clusterSetup.addCluster(clusterName, true);
// Registers and starts controller
LOG.info("Starts controller");
HelixManager controller =
HelixManagerFactory.getZKHelixManager(clusterName, null, InstanceType.CONTROLLER, zkAddr);
controller.connect();
// Registers and starts participant
LOG.info("Starts participant");
String hostname = "localhost";
String instanceId = String.format("%s_%d", hostname, 1);
clusterSetup.addInstanceToCluster(clusterName, instanceId);
HelixManager participant =
HelixManagerFactory.getZKHelixManager(
clusterName, instanceId, InstanceType.PARTICIPANT, zkAddr);
participant.connect();
LOG.info("Register state machine");
final CountDownLatch latch = new CountDownLatch(1);
participant
.getStateMachineEngine()
.registerStateModelFactory(
"OnlineOffline",
new StateModelFactory<StateModel>() {
@Override
public StateModel createNewStateModel(String stateUnitKey) {
return new SimpleStateModel(latch);
}
},
"test");
String resourceName = "test-resource";
LOG.info("Ideal state assignment");
HelixAdmin helixAdmin = participant.getClusterManagmentTool();
helixAdmin.addResource(
clusterName,
resourceName,
1,
"OnlineOffline",
IdealState.RebalanceMode.CUSTOMIZED.toString());
IdealState idealState = helixAdmin.getResourceIdealState(clusterName, resourceName);
idealState.setReplicas("1");
idealState.setStateModelFactoryName("test");
idealState.setPartitionState(resourceName + "_0", instanceId, "ONLINE");
LOG.info("Shutdown ZK server");
TestHelper.stopZkServer(zkServerRef.get());
Executors.newSingleThreadScheduledExecutor()
.schedule(
new Runnable() {
@Override
public void run() {
try {
LOG.info("Restart ZK server");
// zkServer.set(TestUtils.startZookeeper(zkDir, zkPort));
zkServerRef.set(TestHelper.startZkServer(zkAddr, null, false));
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
}
},
2L,
TimeUnit.SECONDS);
// future.get();
LOG.info("Before update ideal state");
helixAdmin.setResourceIdealState(clusterName, resourceName, idealState);
LOG.info("After update ideal state");
LOG.info("Wait for OFFLINE->ONLINE state transition");
try {
Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
// wait until stable state
boolean result =
ClusterStateVerifier.verifyByZkCallback(
new BestPossAndExtViewZkVerifier(zkAddr, clusterName));
Assert.assertTrue(result);
} finally {
participant.disconnect();
zkServerRef.get().shutdown();
}
}
