/**
* Copyright (C) 2012 LinkedIn Inc <opensource@linkedin.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.linkedin.helix.manager.zk;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.linkedin.helix.TestHelper;
import com.linkedin.helix.TestHelper.StartCMResult;
import com.linkedin.helix.ZkHelixTestManager;
import com.linkedin.helix.integration.ZkStandAloneCMTestBaseWithPropertyServerCheck;
import com.linkedin.helix.tools.ClusterStateVerifier;
public class TestLiveInstanceBounce extends ZkStandAloneCMTestBaseWithPropertyServerCheck
{
@Test
public void testInstanceBounce() throws Exception
{
String controllerName = CONTROLLER_PREFIX + "_0";
StartCMResult controllerResult = _startCMResultMap.get(controllerName);
ZkHelixTestManager controller = (ZkHelixTestManager) controllerResult._manager;
int handlerSize = controller.getHandlers().size();
for (int i = 0; i < 2; i++)
{
String instanceName = PARTICIPANT_PREFIX + "_" + (START_PORT + i);
// kill 2 participants
_startCMResultMap.get(instanceName)._manager.disconnect();
_startCMResultMap.get(instanceName)._thread.interrupt();
try
{
Thread.sleep(1000);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
// restart the participant
StartCMResult result = TestHelper.startDummyProcess(ZK_ADDR, CLUSTER_NAME, instanceName);
_startCMResultMap.put(instanceName, result);
Thread.sleep(100);
}
Thread.sleep(2000);
boolean result = ClusterStateVerifier.verifyByPolling(
new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR, CLUSTER_NAME), 50 * 1000);
Assert.assertTrue(result);
// When a new live instance is created, we still add current state listener to it
// and we will remove current-state listener on expired session, so the number of callback handlers is unchanged
Assert.assertEquals( controller.getHandlers().size(), handlerSize, "Number of handlers should remain unchanged in case of participant rebounce");
}
}