package org.apache.helix.integration;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import java.util.Date;
import java.util.Map;
import org.apache.helix.HelixAdmin;
import org.apache.helix.TestHelper;
import org.apache.helix.manager.zk.MockParticipant;
import org.apache.helix.manager.zk.MockController;
import org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
import org.apache.helix.model.IdealState.RebalanceMode;
import org.apache.helix.model.builder.HelixConfigScopeBuilder;
import org.apache.helix.testutil.HelixTestUtil;
import org.apache.helix.testutil.ZkTestBase;
import org.apache.helix.tools.ClusterStateVerifier;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.google.common.collect.Maps;
public class TestInvalidResourceRebalance extends ZkTestBase {
/**
* Ensure that the Helix controller doesn't attempt to rebalance resources with invalid ideal
* states
*/
@Test
public void testResourceRebalanceSkipped() throws Exception {
final int NUM_PARTICIPANTS = 2;
final int NUM_PARTITIONS = 4;
final int NUM_REPLICAS = 2;
final String RESOURCE_NAME = "TestDB0";
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String clusterName = className + "_" + methodName;
System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
// Set up cluster
TestHelper.setupCluster(clusterName, _zkaddr, 12918, // participant port
"localhost", // participant name prefix
"TestDB", // resource name prefix
1, // resources
NUM_PARTITIONS, // partitions per resource
NUM_PARTICIPANTS, // number of nodes
NUM_REPLICAS, // replicas
"MasterSlave", RebalanceMode.SEMI_AUTO, // use SEMI_AUTO mode
true); // do rebalance
// start controller
MockController controller =
new MockController(_zkaddr, clusterName, "controller");
controller.syncStart();
// add the ideal state spec (prevents non-CUSTOMIZED MasterSlave ideal states)
HelixAdmin helixAdmin = controller.getClusterManagmentTool();
Map<String, String> properties = Maps.newHashMap();
properties.put("IdealStateRule!sampleRuleName",
"IDEAL_STATE_MODE=CUSTOMIZED,STATE_MODEL_DEF_REF=MasterSlave");
helixAdmin.setConfig(
new HelixConfigScopeBuilder(ConfigScopeProperty.CLUSTER).forCluster(clusterName).build(),
properties);
// start participants
MockParticipant[] participants = new MockParticipant[NUM_PARTICIPANTS];
for (int i = 0; i < NUM_PARTICIPANTS; i++) {
final String instanceName = "localhost_" + (12918 + i);
participants[i] = new MockParticipant(_zkaddr, clusterName, instanceName);
participants[i].syncStart();
}
Thread.sleep(1000);
boolean result =
ClusterStateVerifier.verifyByZkCallback(new HelixTestUtil.EmptyZkVerifier(clusterName,
RESOURCE_NAME, _zkclient));
Assert.assertTrue(result, "External view and current state must be empty");
// cleanup
for (int i = 0; i < NUM_PARTICIPANTS; i++) {
participants[i].syncStop();
}
controller.syncStop();
}
}