mjsax commented on code in PR #22630: URL: https://github.com/apache/kafka/pull/22630#discussion_r3461865504
########## streams/integration-tests/src/test/java/org/apache/kafka/streams/integration/ColdStartStickinessIntegrationTest.java: ########## @@ -0,0 +1,270 @@ +/* + * 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.kafka.streams.integration; + +import org.apache.kafka.clients.CommonClientConfigs; +import org.apache.kafka.clients.admin.Admin; +import org.apache.kafka.clients.consumer.ConsumerConfig; +import org.apache.kafka.clients.producer.ProducerConfig; +import org.apache.kafka.common.serialization.IntegerDeserializer; +import org.apache.kafka.common.serialization.IntegerSerializer; +import org.apache.kafka.common.serialization.Serdes; +import org.apache.kafka.common.utils.Utils; +import org.apache.kafka.coordinator.group.GroupCoordinatorConfig; +import org.apache.kafka.streams.GroupProtocol; +import org.apache.kafka.streams.KafkaStreams; +import org.apache.kafka.streams.KeyValue; +import org.apache.kafka.streams.StreamsBuilder; +import org.apache.kafka.streams.StreamsConfig; +import org.apache.kafka.streams.Topology; +import org.apache.kafka.streams.integration.utils.EmbeddedKafkaCluster; +import org.apache.kafka.streams.integration.utils.IntegrationTestUtils; +import org.apache.kafka.streams.integration.utils.IntegrationTestUtils.TrackingStateRestoreListener; +import org.apache.kafka.streams.kstream.Consumed; +import org.apache.kafka.streams.kstream.Materialized; +import org.apache.kafka.streams.kstream.Produced; +import org.apache.kafka.streams.processor.internals.assignment.LegacyStickyTaskAssignor; +import org.apache.kafka.streams.state.Stores; +import org.apache.kafka.test.TestUtils; + +import org.junit.jupiter.api.AfterAll; +import org.junit.jupiter.api.AfterEach; +import org.junit.jupiter.api.BeforeAll; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Tag; +import org.junit.jupiter.api.TestInfo; +import org.junit.jupiter.api.Timeout; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.ValueSource; + +import java.io.File; +import java.io.IOException; +import java.nio.file.Files; +import java.time.Duration; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Properties; +import java.util.regex.Pattern; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +import static java.util.Arrays.asList; +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.purgeLocalStreamsState; +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.startApplicationAndWaitUntilRunning; +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.waitForEmptyConsumerGroup; +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.waitForEmptyStreamGroup; +import static org.apache.kafka.streams.integration.utils.IntegrationTestUtils.waitUntilMinKeyValueRecordsReceived; +import static org.apache.kafka.streams.utils.TestUtils.safeUniqueTestName; +import static org.hamcrest.MatcherAssert.assertThat; +import static org.hamcrest.Matchers.equalTo; + +@Timeout(600) +@Tag("integration") +public class ColdStartStickinessIntegrationTest { + + private static final int NUM_BROKERS = 1; + private static final int NUM_PARTITIONS = 8; + private static final int NUM_KEYS = 1_000; + private static final int INITIAL_REBALANCE_DELAY_MS = 5_000; + private static final Pattern TASK_DIR = Pattern.compile("\\d+_\\d+"); + + public static final EmbeddedKafkaCluster CLUSTER; + static { + final Properties brokerProps = new Properties(); + brokerProps.put(GroupCoordinatorConfig.GROUP_INITIAL_REBALANCE_DELAY_MS_CONFIG, Integer.toString(INITIAL_REBALANCE_DELAY_MS)); + brokerProps.put(GroupCoordinatorConfig.STREAMS_GROUP_INITIAL_REBALANCE_DELAY_MS_CONFIG, Integer.toString(INITIAL_REBALANCE_DELAY_MS)); + CLUSTER = new EmbeddedKafkaCluster(NUM_BROKERS, brokerProps); + } + + private static Admin admin; + + @BeforeAll + public static void startCluster() throws IOException { + CLUSTER.start(); + final Properties adminConfig = new Properties(); + adminConfig.put(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG, CLUSTER.bootstrapServers()); + admin = Admin.create(adminConfig); + } + + @AfterAll + public static void closeCluster() { + Utils.closeQuietly(admin, "admin"); + CLUSTER.stop(); + } + + private String appId; + private String inputTopic; + private String outputTopic; + private final List<Properties> streamsConfigurations = new ArrayList<>(); + + @BeforeEach + public void createTopics(final TestInfo testInfo) throws InterruptedException { + appId = safeUniqueTestName(testInfo); + inputTopic = appId + "-input"; + outputTopic = appId + "-output"; + CLUSTER.createTopic(inputTopic, NUM_PARTITIONS, 1); + CLUSTER.createTopic(outputTopic, NUM_PARTITIONS, 1); + } + + @AfterEach + public void cleanup() throws Exception { + purgeLocalStreamsState(streamsConfigurations); + streamsConfigurations.clear(); + CLUSTER.deleteAllTopics(); + } + + @ParameterizedTest + @ValueSource(booleans = {false, true}) + public void shouldStickToLocalStateOnColdStart(final boolean streamsProtocol) throws Exception { Review Comment: Yes, yes... :) -- This is an automated message from the Apache Git Service. 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