package org.apache.helix.tools;
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* 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
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import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.helix.NotificationContext;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.TestHelper;
import org.apache.helix.ZNRecord;
import org.apache.helix.manager.zk.ZKHelixDataAccessor;
import org.apache.helix.manager.zk.ZkBaseDataAccessor;
import org.apache.helix.mock.controller.ClusterController;
import org.apache.helix.mock.participant.MockParticipant;
import org.apache.helix.mock.participant.MockParticipant.ErrTransition;
import org.apache.helix.model.LiveInstance;
import org.apache.helix.model.Message;
import org.apache.helix.webapp.resources.JsonParameters;
import org.apache.log4j.Logger;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestResetPartitionState extends AdminTestBase {
private final static Logger LOG = Logger
.getLogger(TestResetPartitionState.class);
String getClusterUrl(String cluster) {
return "http://localhost:" + ADMIN_PORT + "/clusters" + "/" + cluster;
}
String getInstanceUrl(String cluster, String instance) {
return "http://localhost:" + ADMIN_PORT + "/clusters/" + cluster
+ "/instances/" + instance;
}
String getResourceUrl(String cluster, String resourceGroup) {
return "http://localhost:" + ADMIN_PORT + "/clusters/" + cluster
+ "/resourceGroups/" + resourceGroup;
}
AtomicInteger _errToOfflineInvoked = new AtomicInteger(0);
class ErrTransitionWithResetCnt extends ErrTransition {
public ErrTransitionWithResetCnt(Map<String, Set<String>> errPartitions) {
super(errPartitions);
}
@Override
public void doTransition(Message message, NotificationContext context) {
super.doTransition(message, context);
String fromState = message.getFromState();
String toState = message.getToState();
if (fromState.equals("ERROR") && toState.equals("OFFLINE")) {
// System.err.println("doReset() invoked");
_errToOfflineInvoked.incrementAndGet();
}
}
}
@Test()
public void testResetPartitionState() throws Exception {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String clusterName = className + "_" + methodName;
final int n = 5;
System.out.println("START " + clusterName + " at "
+ new Date(System.currentTimeMillis()));
TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
"localhost", // participant name prefix
"TestDB", // resource name prefix
1, // resources
10, // partitions per resource
n, // number of nodes
3, // replicas
"MasterSlave", true); // do rebalance
// start admin thread
// AdminThread adminThread = new AdminThread(ZK_ADDR, _port);
// adminThread.start();
// start controller
ClusterController controller = new ClusterController(clusterName,
"controller_0", ZK_ADDR);
controller.syncStart();
Map<String, Set<String>> errPartitions = new HashMap<String, Set<String>>();
errPartitions.put("SLAVE-MASTER", TestHelper.setOf("TestDB0_4"));
errPartitions.put("OFFLINE-SLAVE", TestHelper.setOf("TestDB0_8"));
// start mock participants
MockParticipant[] participants = new MockParticipant[n];
for (int i = 0; i < n; i++) {
String instanceName = "localhost_" + (12918 + i);
if (i == 0) {
participants[i] = new MockParticipant(clusterName,
instanceName, ZK_ADDR, new ErrTransition(errPartitions));
} else {
participants[i] = new MockParticipant(clusterName,
instanceName, ZK_ADDR);
}
participants[i].syncStart();
}
// verify cluster
Map<String, Map<String, String>> errStateMap = new HashMap<String, Map<String, String>>();
errStateMap.put("TestDB0", new HashMap<String, String>());
errStateMap.get("TestDB0").put("TestDB0_4", "localhost_12918");
errStateMap.get("TestDB0").put("TestDB0_8", "localhost_12918");
boolean result = ClusterStateVerifier
.verifyByZkCallback((new ClusterStateVerifier.BestPossAndExtViewZkVerifier(
ZK_ADDR, clusterName, errStateMap)));
Assert.assertTrue(result, "Cluster verification fails");
// reset a non-exist partition, should throw exception
String hostName = "localhost_12918";
String instanceUrl = getInstanceUrl(clusterName, hostName);
Map<String, String> paramMap = new HashMap<String, String>();
paramMap.put(JsonParameters.MANAGEMENT_COMMAND,
ClusterSetup.resetPartition);
paramMap.put(JsonParameters.PARTITION, "TestDB0_nonExist");
paramMap.put(JsonParameters.RESOURCE, "TestDB0");
LOG.info("IGNORABLE exception: test reset non-exist partition");
TestHelixAdminScenariosRest.assertSuccessPostOperation(instanceUrl,
paramMap, true);
// reset 2 error partitions
errPartitions.clear();
participants[0].setTransition(new ErrTransitionWithResetCnt(
errPartitions));
clearStatusUpdate(clusterName, "localhost_12918", "TestDB0",
"TestDB0_4");
_errToOfflineInvoked.set(0);
paramMap.put(JsonParameters.PARTITION, "TestDB0_4 TestDB0_8");
TestHelixAdminScenariosRest.assertSuccessPostOperation(instanceUrl,
paramMap, false);
for (int i = 0; i < 10; i++) {
Thread.sleep(400); // wait reset to be done
LOG.info("IGNORABLE exception: test reset non-error partition");
TestHelixAdminScenariosRest.assertSuccessPostOperation(instanceUrl,
paramMap, true);
result = ClusterStateVerifier
.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(
ZK_ADDR, clusterName));
if (result == true) {
break;
}
}
Assert.assertTrue(result);
Assert.assertEquals(_errToOfflineInvoked.get(), 2,
"reset() should be invoked 2 times");
// clean up
// wait for all zk callbacks done
Thread.sleep(1000);
// adminThread.stop();
controller.syncStop();
for (int i = 0; i < 5; i++) {
participants[i].syncStop();
}
System.out.println("END " + clusterName + " at "
+ new Date(System.currentTimeMillis()));
}
private void clearStatusUpdate(String clusterName, String instance,
String resource, String partition) {
// clear status update for error partition so verify() will not fail on
// old
// errors
ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName,
new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
Builder keyBuilder = accessor.keyBuilder();
LiveInstance liveInstance = accessor.getProperty(keyBuilder
.liveInstance(instance));
accessor.removeProperty(keyBuilder.stateTransitionStatus(instance,
liveInstance.getSessionId(), resource, partition));
}
// TODO: throw exception in reset()
}