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PromoteLiteMemberTest.java
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PromoteLiteMemberTest.java
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/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.internal.cluster.impl;
import com.hazelcast.cluster.ClusterState;
import com.hazelcast.config.Config;
import com.hazelcast.core.Cluster;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.core.Member;
import com.hazelcast.core.MemberLeftException;
import com.hazelcast.internal.cluster.impl.operations.PromoteLiteMemberOp;
import com.hazelcast.internal.partition.InternalPartition;
import com.hazelcast.nio.Address;
import com.hazelcast.spi.InternalCompletableFuture;
import com.hazelcast.spi.impl.operationservice.impl.Invocation;
import com.hazelcast.spi.impl.operationservice.impl.InvocationRegistry;
import com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl;
import com.hazelcast.test.AssertTask;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.TestHazelcastInstanceFactory;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import com.hazelcast.test.annotation.SerializationSamplesExcluded;
import com.hazelcast.util.UuidUtil;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import static com.hazelcast.internal.cluster.impl.AdvancedClusterStateTest.changeClusterStateEventually;
import static com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook.EXPLICIT_SUSPICION;
import static com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook.F_ID;
import static com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook.HEARTBEAT;
import static com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook.MEMBER_INFO_UPDATE;
import static com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook.PROMOTE_LITE_MEMBER;
import static com.hazelcast.test.PacketFiltersUtil.dropOperationsBetween;
import static com.hazelcast.test.PacketFiltersUtil.dropOperationsFrom;
import static com.hazelcast.test.PacketFiltersUtil.rejectOperationsBetween;
import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
import static org.hamcrest.Matchers.greaterThan;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class, SerializationSamplesExcluded.class})
public class PromoteLiteMemberTest extends HazelcastTestSupport {
@Rule
public ExpectedException exception = ExpectedException.none();
@Test
public void liteMaster_promoted() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config().setLiteMember(true));
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
hz1.getCluster().promoteLocalLiteMember();
assertFalse(getMember(hz1).isLiteMember());
assertAllNormalMembers(hz1.getCluster());
assertAllNormalMembersEventually(hz2.getCluster());
assertAllNormalMembersEventually(hz3.getCluster());
}
@Test
public void liteMember_promoted() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config().setLiteMember(true));
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
hz2.getCluster().promoteLocalLiteMember();
assertFalse(getMember(hz2).isLiteMember());
assertAllNormalMembers(hz1.getCluster());
assertAllNormalMembersEventually(hz2.getCluster());
assertAllNormalMembersEventually(hz3.getCluster());
}
@Test
public void normalMember_promotion_shouldFail_onLocal() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
exception.expect(IllegalStateException.class);
hz1.getCluster().promoteLocalLiteMember();
}
@Test
public void normalMember_promotion_shouldFail_onNonMaster() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
PromoteLiteMemberOp op = new PromoteLiteMemberOp();
op.setCallerUuid(getMember(hz2).getUuid());
InternalCompletableFuture<MembersView> future =
getOperationService(hz2).invokeOnTarget(ClusterServiceImpl.SERVICE_NAME, op, getAddress(hz3));
exception.expect(IllegalStateException.class);
future.join();
}
@Test
public void normalMember_promotion_shouldBeNoop_onMaster() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
PromoteLiteMemberOp op = new PromoteLiteMemberOp();
op.setCallerUuid(getMember(hz2).getUuid());
InternalCompletableFuture<MembersView> future =
getOperationService(hz2).invokeOnTarget(ClusterServiceImpl.SERVICE_NAME, op, getAddress(hz1));
future.join();
}
@Test
public void notExistingMember_promotion_shouldFail() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
PromoteLiteMemberOp op = new PromoteLiteMemberOp();
op.setCallerUuid(UuidUtil.newUnsecureUuidString());
InternalCompletableFuture<MembersView> future =
getOperationService(hz2).invokeOnTarget(ClusterServiceImpl.SERVICE_NAME, op, getAddress(hz1));
exception.expect(IllegalStateException.class);
future.join();
}
@Test
public void standaloneLiteMember_promoted() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz = factory.newHazelcastInstance(new Config().setLiteMember(true));
hz.getCluster().promoteLocalLiteMember();
assertFalse(getMember(hz).isLiteMember());
assertAllNormalMembers(hz.getCluster());
warmUpPartitions(hz);
assertPartitionsAssigned(hz);
}
@Test
public void promotedMasterLiteMember_shouldHave_partitionsAssigned() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config().setLiteMember(true));
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
warmUpPartitions(hz1, hz2, hz3);
assertNoPartitionsAssigned(hz1);
hz1.getCluster().promoteLocalLiteMember();
assertPartitionsAssignedEventually(hz1);
}
@Test
public void promotedLiteMember_shouldHave_partitionsAssigned() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config().setLiteMember(true));
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
warmUpPartitions(hz1, hz2, hz3);
assertNoPartitionsAssigned(hz2);
hz2.getCluster().promoteLocalLiteMember();
assertPartitionsAssignedEventually(hz2);
}
@Test
public void promotion_shouldFail_whenClusterStatePassive() {
promotion_shouldFail_whenClusterState_NotAllowMigration(ClusterState.PASSIVE);
}
@Test
public void promotion_shouldFail_whenClusterStateFrozen() {
promotion_shouldFail_whenClusterState_NotAllowMigration(ClusterState.FROZEN);
}
@Test
public void promotion_shouldFail_whenClusterStateNoMigration() {
promotion_shouldFail_whenClusterState_NotAllowMigration(ClusterState.NO_MIGRATION);
}
private void promotion_shouldFail_whenClusterState_NotAllowMigration(ClusterState state) {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config().setLiteMember(true));
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config());
warmUpPartitions(hz1, hz2, hz3);
changeClusterStateEventually(hz2, state);
exception.expect(IllegalStateException.class);
hz2.getCluster().promoteLocalLiteMember();
}
@Test
public void promotion_shouldFail_whenMastershipClaimInProgress_duringPromotion() throws Exception {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config().setLiteMember(true));
// artificially set mastership claim flag
ClusterServiceImpl clusterService = getNode(hz1).getClusterService();
clusterService.getClusterJoinManager().setMastershipClaimInProgress();
Cluster cluster = hz2.getCluster();
exception.expect(IllegalStateException.class);
cluster.promoteLocalLiteMember();
}
@Test
public void promotion_shouldFail_whenMasterLeaves_duringPromotion() throws Exception {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
HazelcastInstance hz3 = factory.newHazelcastInstance(new Config().setLiteMember(true));
assertClusterSizeEventually(3, hz2);
dropOperationsBetween(hz3, hz1, F_ID, singletonList(PROMOTE_LITE_MEMBER));
final Cluster cluster = hz3.getCluster();
Future<Exception> future = spawn(new Callable<Exception>() {
@Override
public Exception call() throws Exception {
try {
cluster.promoteLocalLiteMember();
} catch (Exception e) {
return e;
}
return null;
}
});
assertPromotionInvocationStarted(hz3);
hz1.getLifecycleService().terminate();
assertClusterSizeEventually(2, hz2, hz3);
Exception exception = future.get();
// MemberLeftException is wrapped by HazelcastException
assertInstanceOf(MemberLeftException.class, exception.getCause());
}
@Test
public void promotion_shouldFail_whenMasterIsSuspected_duringPromotion() throws Exception {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance hz1 = factory.newHazelcastInstance(new Config());
final HazelcastInstance hz2 = factory.newHazelcastInstance(new Config());
final HazelcastInstance hz3 = factory.newHazelcastInstance(new Config().setLiteMember(true));
assertClusterSizeEventually(3, hz2);
rejectOperationsBetween(hz3, hz1, F_ID, asList(PROMOTE_LITE_MEMBER, EXPLICIT_SUSPICION));
dropOperationsFrom(hz2, F_ID, asList(MEMBER_INFO_UPDATE, EXPLICIT_SUSPICION));
dropOperationsFrom(hz1, F_ID, singletonList(HEARTBEAT));
final Cluster cluster = hz3.getCluster();
Future future = spawn(new Runnable() {
@Override
public void run() {
cluster.promoteLocalLiteMember();
}
});
assertPromotionInvocationStarted(hz3);
suspectMember(getNode(hz3), getNode(hz1));
suspectMember(getNode(hz2), getNode(hz1));
assertMasterAddressEventually(getAddress(hz2), hz3);
dropOperationsBetween(hz3, hz1, F_ID, singletonList(EXPLICIT_SUSPICION));
try {
future.get();
fail("Promotion should fail!");
} catch (ExecutionException e) {
assertInstanceOf(IllegalStateException.class, e.getCause());
}
}
@Test
public void masterMemberAttributes_arePreserved_afterPromotion() throws Exception {
memberAttributes_arePreserved_afterPromotion(true);
}
@Test
public void normalMemberAttributes_arePreserved_afterPromotion() throws Exception {
memberAttributes_arePreserved_afterPromotion(false);
}
private void memberAttributes_arePreserved_afterPromotion(boolean isMaster) throws Exception {
final String attribute1 = "attr1";
final String attribute2 = "attr2";
final String attributeValue = "value";
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
HazelcastInstance[] instances = new HazelcastInstance[2];
instances[0] = factory.newHazelcastInstance(new Config().setLiteMember(isMaster));
instances[1] = factory.newHazelcastInstance(new Config().setLiteMember(!isMaster));
HazelcastInstance hz = instances[isMaster ? 0 : 1];
// Get local member and SET attribute BEFORE promotion
Member localMember = hz.getCluster().getLocalMember();
localMember.setStringAttribute(attribute1, attributeValue);
assertEquals(attributeValue, localMember.getStringAttribute(attribute1));
// Promote local Lite member
hz.getCluster().promoteLocalLiteMember();
// Get local member and SET attribute AFTER promotion
localMember = hz.getCluster().getLocalMember();
localMember.setStringAttribute(attribute2, attributeValue);
// Check attributes from localMember
assertEquals(attributeValue, localMember.getStringAttribute(attribute1));
assertEquals(attributeValue, localMember.getStringAttribute(attribute2));
// Check attributes from member list
for (Member member : hz.getCluster().getMembers()) {
if (member.localMember()) {
assertEquals(attributeValue, member.getStringAttribute(attribute1));
assertEquals(attributeValue, member.getStringAttribute(attribute2));
break;
}
}
}
@Test
public void test_lite_member_promotion_causes_no_data_loss_on_three_members() throws InterruptedException {
final int entryCount = 1000;
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
Config config = new Config().setLiteMember(true);
// start first hazelcast instance as a lite member
final HazelcastInstance firstHazelcastInstance = factory.newHazelcastInstance(config);
// start second and third hazelcast instances as a lite member
final HazelcastInstance secondHazelcastInstance = factory.newHazelcastInstance(config);
final HazelcastInstance thirdHazelcastInstance = factory.newHazelcastInstance(config);
// promote all instances to data members
firstHazelcastInstance.getCluster().promoteLocalLiteMember();
secondHazelcastInstance.getCluster().promoteLocalLiteMember();
thirdHazelcastInstance.getCluster().promoteLocalLiteMember();
// check if cluster is in a good shape
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertTrue(firstHazelcastInstance.getPartitionService().isClusterSafe());
}
});
// insert some dummy data into the testing map
final String mapName = randomMapName();
IMap<String, String> testMap = firstHazelcastInstance.getMap(mapName);
for (int i = 0; i < entryCount; ++i) {
testMap.put("key" + i, "value" + i);
}
// check all data is correctly inserted
assertEquals(entryCount, testMap.size());
// kill second instance
secondHazelcastInstance.getLifecycleService().terminate();
// backup count for the map is set to 1
// even with 1 node down, no data loss is expected
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertEquals(entryCount, firstHazelcastInstance.getMap(mapName).size());
}
});
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertEquals(entryCount, thirdHazelcastInstance.getMap(mapName).size());
}
});
}
@Test
public void test_lite_member_promotion_causes_no_data_loss_on_two_members() throws InterruptedException {
final int entryCount = 1000;
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory();
Config config = new Config().setLiteMember(true);
// start first hazelcast instance as a lite member
final HazelcastInstance firstHazelcastInstance = factory.newHazelcastInstance(config);
// start second hazelcast instance as a lite member
final HazelcastInstance secondHazelcastInstance = factory.newHazelcastInstance(config);
// promote all instances to data members
firstHazelcastInstance.getCluster().promoteLocalLiteMember();
secondHazelcastInstance.getCluster().promoteLocalLiteMember();
// check if cluster is in a good shape
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
firstHazelcastInstance.getPartitionService().isClusterSafe();
}
});
// insert some dummy data into the testing map
final String mapName = randomMapName();
IMap<String, String> testMap = firstHazelcastInstance.getMap(mapName);
for (int i = 0; i < entryCount; ++i) {
testMap.put("key" + i, "value" + i);
}
// check all data is correctly inserted
assertEquals(entryCount, testMap.size());
// kill second instance
secondHazelcastInstance.getLifecycleService().terminate();
// backup count for the map is set to 1
// even with 1 node down, no data loss is expected
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertEquals(entryCount, firstHazelcastInstance.getMap(mapName).size());
}
});
}
private void assertPromotionInvocationStarted(HazelcastInstance instance) {
final OperationServiceImpl operationService =
(OperationServiceImpl) getNode(instance).getNodeEngine().getOperationService();
final InvocationRegistry invocationRegistry = operationService.getInvocationRegistry();
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
for (Map.Entry<Long, Invocation> entry : invocationRegistry.entrySet()) {
if (entry.getValue().op instanceof PromoteLiteMemberOp) {
return;
}
}
fail("Cannot find PromoteLiteMemberOp invocation!");
}
});
}
private static void assertPartitionsAssignedEventually(final HazelcastInstance instance) {
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertPartitionsAssigned(instance);
}
});
}
private static void assertPartitionsAssigned(HazelcastInstance instance) {
Address address = getAddress(instance);
InternalPartition[] partitions = getPartitionService(instance).getInternalPartitions();
int k = 0;
for (InternalPartition partition : partitions) {
if (address.equals(partition.getOwnerOrNull())) {
k++;
}
}
assertThat(k, greaterThan(0));
}
private static void assertNoPartitionsAssigned(HazelcastInstance instance) {
Address address = getAddress(instance);
InternalPartition[] partitions = getPartitionService(instance).getInternalPartitions();
for (InternalPartition partition : partitions) {
for (int i = 0; i < InternalPartition.MAX_REPLICA_COUNT; i++) {
assertNotEquals(address, partition.getReplicaAddress(i));
}
}
}
private static void assertAllNormalMembers(Cluster cluster) {
for (Member member : cluster.getMembers()) {
assertFalse("Member is lite: " + member, member.isLiteMember());
}
}
private static void assertAllNormalMembersEventually(final Cluster cluster) {
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
assertAllNormalMembers(cluster);
}
});
}
private static Member getMember(HazelcastInstance hz) {
return hz.getCluster().getLocalMember();
}
}