我正在使用spring KafkaEmbedded test util编写一组测试。每个测试分别站立一个嵌入式kafka实例,产生事件并声明所产生的下游事件。
在IDE(例如IntelliJ)中运行时,测试始终通过,但是在使用SBT运行时,测试间歇性地失败(大约50%的时间,没有规律性)。如果测试失败,则会看到以下错误:
o.a.zookeeper.server.ZooKeeperServer - ZKShutdownHandler is not registered, so ZooKeeper server won't take any action on ERROR or SHUTDOWN server state changes
另外,我看到许多INFO日志报告缺少ZooKeeper节点,例如:
o.a.z.server.PrepRequestProcessor - Got user-level KeeperException when processing sessionid:0x164a50fe9fd0001 type:create cxid:0x5 zxid:0x4 txntype:-1 reqpath:n/a Error Path:/brokers Error:KeeperErrorCode = NoNode for /brokers
这些日志不会出现在成功的测试中。当我说“我看到许多INFO日志”时,我的意思是很多,大约40个这样的日志,其中一些节点路径嵌套在以前报告的节点路径中。
研究表明错误日志是无辜的,我想认为信息日志也是如此,但是它们在测试失败时是独立的。
更新7/17:
KStreams /生产者/消费者配置:
Properties properties = new Properties();
properties.put(StreamsConfig.APPLICATION_ID_CONFIG, appName);
properties.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapUrls);
properties.put(StreamsConfig.STATE_DIR_CONFIG, String.format("/tmp/kafka-streams/%s/%s",
properties.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, 0);
properties.put(StreamsConfig.CLIENT_ID_CONFIG, appName);
properties.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 1000);
properties.put(StreamsConfig.REPLICATION_FACTOR_CONFIG, 1);
properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
properties.put(ConsumerConfig.GROUP_ID_CONFIG, appName);
properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, KafkaAvroDeserializer.class
properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, KafkaAvroDeserializer.cla
properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, KafkaAvroSerializer.class);
properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, KafkaAvroSerializer.class);
嵌入式Kafka启动:
@Rule
public KafkaEmbedded kafka = new KafkaEmbedded(getNumKafkaServers(), true, getNumPartitionsPerTopic(), getTopics().keySet().toArray(new String[0]));
之前测试:
@Before
public void before() {
// build KStreams and start topology
KStreamBuilder kStreamBuilder = new KStreamBuilder();
buildStream(kStreamBuilder);
KafkaStreams kafkaStreams = new KafkaStreams(kStreamBuilder, streamsConfig);
kafkaStreams.start();
}
测试之后:
@After
public void after() {
kafka.destroy();
FileUtils.deleteDirectory(new File(streamsConfig.getString(StreamsConfig.STATE_DIR_CONFIG)));
}
更新7/17:
更多上下文,这是一个Spring项目,每个测试都带有这样的注释:
@SpringBootTest(classes = <this-test-class>.class)
@ActiveProfiles("test")
@RunWith(SpringRunner.class)