/**
* 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.integration;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.linkedin.helix.NotificationContext;
import com.linkedin.helix.PropertyKey.Builder;
import com.linkedin.helix.TestHelper;
import com.linkedin.helix.ZNRecord;
import com.linkedin.helix.manager.zk.ZKHelixDataAccessor;
import com.linkedin.helix.manager.zk.ZkBaseDataAccessor;
import com.linkedin.helix.mock.controller.ClusterController;
import com.linkedin.helix.mock.storage.MockParticipant;
import com.linkedin.helix.mock.storage.MockParticipant.ErrTransition;
import com.linkedin.helix.model.LiveInstance;
import com.linkedin.helix.model.Message;
import com.linkedin.helix.tools.ClusterSetup;
import com.linkedin.helix.tools.ClusterStateVerifier;
public class TestResetPartitionState extends ZkIntegrationTestBase
{
int _errToOfflineInvoked = 0;
class ErrTransitionWithResetCnt extends ErrTransition
{
public ErrTransitionWithResetCnt(Map<String, Set<String>> errPartitions)
{
super(errPartitions);
}
@Override
public void doTransition(Message message, NotificationContext context)
{
// System.err.println("doReset() invoked");
super.doTransition(message, context);
String fromState = message.getFromState();
String toState = message.getToState();
if (fromState.equals("ERROR") && toState.equals("OFFLINE"))
{
_errToOfflineInvoked++;
}
}
}
@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 controller
ClusterController controller =
new ClusterController(clusterName, "controller_0", ZK_ADDR);
controller.syncStart();
Map<String, Set<String>> errPartitions = new HashMap<String, Set<String>>()
{
{
put("SLAVE-MASTER", TestHelper.setOf("TestDB0_4"));
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
try
{
String command =
"--zkSvr " + ZK_ADDR + " --resetPartition " + clusterName
+ " localhost_12918 TestDB0 TestDB0_nonExist";
ClusterSetup.processCommandLineArgs(command.split("\\s+"));
Assert.fail("Should throw exception on reset a non-exist partition");
}
catch (Exception e)
{
// OK
}
// reset one error partition
errPartitions.remove("SLAVE-MASTER");
participants[0].setTransition(new ErrTransitionWithResetCnt(errPartitions));
clearStatusUpdate(clusterName, "localhost_12918", "TestDB0", "TestDB0_4");
_errToOfflineInvoked = 0;
String command =
"--zkSvr " + ZK_ADDR + " --resetPartition " + clusterName
+ " localhost_12918 TestDB0 TestDB0_4";
ClusterSetup.processCommandLineArgs(command.split("\\s+"));
Thread.sleep(200); // wait reset to be done
try
{
ClusterSetup.processCommandLineArgs(command.split("\\s+"));
Assert.fail("Should throw exception on reset a partition not in ERROR state");
}
catch (Exception e)
{
// OK
}
errStateMap.get("TestDB0").remove("TestDB0_4");
result =
ClusterStateVerifier.verifyByZkCallback((new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR,
clusterName,
errStateMap)));
Assert.assertTrue(result, "Cluster verification fails");
Assert.assertEquals(_errToOfflineInvoked, 1);
// reset the other error partition
participants[0].setTransition(new ErrTransitionWithResetCnt(null));
clearStatusUpdate(clusterName, "localhost_12918", "TestDB0", "TestDB0_8");
command =
"--zkSvr " + ZK_ADDR + " --resetPartition " + clusterName
+ " localhost_12918 TestDB0 TestDB0_8";
ClusterSetup.processCommandLineArgs(command.split("\\s+"));
result =
ClusterStateVerifier.verifyByPolling(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR,
clusterName));
Assert.assertTrue(result, "Cluster verification fails");
Assert.assertEquals(_errToOfflineInvoked, 2, "Should reset 2 partitions");
// clean up
// wait for all zk callbacks done
Thread.sleep(1000);
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()
}