| /** |
| * 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. |
| */ |
| package org.apache.pulsar.metadata; |
| |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertFalse; |
| import static org.testng.Assert.assertNull; |
| import static org.testng.Assert.assertTrue; |
| import java.time.Duration; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.TimeUnit; |
| import lombok.Cleanup; |
| import org.apache.pulsar.metadata.api.MetadataStoreConfig; |
| import org.apache.pulsar.metadata.api.coordination.CoordinationService; |
| import org.apache.pulsar.metadata.api.coordination.LeaderElection; |
| import org.apache.pulsar.metadata.api.coordination.LeaderElectionState; |
| import org.apache.pulsar.metadata.api.coordination.LockManager; |
| import org.apache.pulsar.metadata.api.coordination.ResourceLock; |
| import org.apache.pulsar.metadata.api.extended.MetadataStoreExtended; |
| import org.apache.pulsar.metadata.api.extended.SessionEvent; |
| import org.apache.pulsar.metadata.coordination.impl.CoordinationServiceImpl; |
| import org.apache.pulsar.metadata.impl.ZKMetadataStore; |
| import org.awaitility.Awaitility; |
| import org.testng.annotations.Test; |
| |
| @Test(groups = "quarantine") |
| public class ZKSessionTest extends BaseMetadataStoreTest { |
| |
| @Test |
| public void testDisconnection() throws Exception { |
| @Cleanup |
| MetadataStoreExtended store = MetadataStoreExtended.create(zks.getConnectionString(), |
| MetadataStoreConfig.builder() |
| .sessionTimeoutMillis(30_000) |
| .build()); |
| |
| BlockingQueue<SessionEvent> sessionEvents = new LinkedBlockingQueue<>(); |
| store.registerSessionListener(sessionEvents::add); |
| |
| zks.stop(); |
| |
| SessionEvent e = sessionEvents.poll(5, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.ConnectionLost); |
| |
| zks.start(); |
| e = sessionEvents.poll(20, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.Reconnected); |
| |
| e = sessionEvents.poll(5, TimeUnit.SECONDS); |
| assertNull(e); |
| } |
| |
| @Test |
| public void testSessionLost() throws Exception { |
| @Cleanup |
| MetadataStoreExtended store = MetadataStoreExtended.create(zks.getConnectionString(), |
| MetadataStoreConfig.builder() |
| .sessionTimeoutMillis(5_000) |
| .build()); |
| |
| BlockingQueue<SessionEvent> sessionEvents = new LinkedBlockingQueue<>(); |
| store.registerSessionListener(sessionEvents::add); |
| |
| zks.stop(); |
| |
| SessionEvent e = sessionEvents.poll(5, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.ConnectionLost); |
| |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionLost); |
| |
| zks.start(); |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.Reconnected); |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionReestablished); |
| |
| e = sessionEvents.poll(1, TimeUnit.SECONDS); |
| assertNull(e); |
| } |
| |
| @Test |
| public void testReacquireLocksAfterSessionLost() throws Exception { |
| @Cleanup |
| MetadataStoreExtended store = MetadataStoreExtended.create(zks.getConnectionString(), |
| MetadataStoreConfig.builder() |
| .sessionTimeoutMillis(2_000) |
| .build()); |
| |
| BlockingQueue<SessionEvent> sessionEvents = new LinkedBlockingQueue<>(); |
| store.registerSessionListener(sessionEvents::add); |
| |
| @Cleanup |
| CoordinationService coordinationService = new CoordinationServiceImpl(store); |
| @Cleanup |
| LockManager<String> lm1 = coordinationService.getLockManager(String.class); |
| |
| String path = newKey(); |
| |
| ResourceLock<String> lock = lm1.acquireLock(path, "value-1").join(); |
| |
| |
| zks.expireSession(((ZKMetadataStore) store).getZkSessionId()); |
| |
| SessionEvent e = sessionEvents.poll(5, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.ConnectionLost); |
| |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionLost); |
| |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.Reconnected); |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionReestablished); |
| |
| Awaitility.await().untilAsserted(() -> assertTrue(store.get(path).join().isPresent())); |
| assertFalse(lock.getLockExpiredFuture().isDone()); |
| } |
| |
| @Test |
| public void testReacquireLeadershipAfterSessionLost() throws Exception { |
| // --- init |
| @Cleanup |
| MetadataStoreExtended store = MetadataStoreExtended.create(zks.getConnectionString(), |
| MetadataStoreConfig.builder() |
| .sessionTimeoutMillis(2_000) |
| .build()); |
| |
| BlockingQueue<SessionEvent> sessionEvents = new LinkedBlockingQueue<>(); |
| store.registerSessionListener(sessionEvents::add); |
| BlockingQueue<LeaderElectionState> leaderElectionEvents = new LinkedBlockingQueue<>(); |
| String path = newKey(); |
| |
| @Cleanup |
| CoordinationService coordinationService = new CoordinationServiceImpl(store); |
| @Cleanup |
| LeaderElection<String> le1 = coordinationService.getLeaderElection(String.class, path, |
| leaderElectionEvents::add); |
| // --- test manual elect |
| le1.elect("value-1").join(); |
| assertEquals(le1.getState(), LeaderElectionState.Leading); |
| |
| LeaderElectionState les = leaderElectionEvents.poll(5, TimeUnit.SECONDS); |
| assertEquals(les, LeaderElectionState.Leading); |
| // --- expire session |
| zks.expireSession(((ZKMetadataStore) store).getZkSessionId()); |
| |
| SessionEvent e = sessionEvents.poll(5, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.ConnectionLost); |
| |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionLost); |
| // --- test le1 can be leader |
| Awaitility.await().atMost(Duration.ofSeconds(15)) |
| .untilAsserted(()-> assertEquals(le1.getState(),LeaderElectionState.Leading)); // reacquire leadership |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.Reconnected); |
| e = sessionEvents.poll(10, TimeUnit.SECONDS); |
| assertEquals(e, SessionEvent.SessionReestablished); |
| Awaitility.await().atMost(Duration.ofSeconds(15)) |
| .untilAsserted(()-> assertEquals(le1.getState(),LeaderElectionState.Leading)); |
| assertTrue(store.get(path).join().isPresent()); |
| } |
| } |