我有SpringBoot应用程序,我正在使用SpringCloudStream连接到kafka。我正在尝试为同一个kafka主题设置两个独立的流侦听器方法。
@StreamListener("countries")
@SendTo("aggregated-statistic")
public KStream<?, AggregatedCountry> process(KStream<Object, Country> input) {
return input
.groupBy((key, value) -> value.getCountryCode())
.aggregate(this::initialize,
this::aggregateAmount,
materializedAsPersistentStore("countries", Serdes.String(),
Serdes.serdeFrom(new JsonSerializer<>(),
new JsonDeserializer<>(AggregatedCountry.class))))
.toStream()
.map((key, value) -> new KeyValue<>(null, value));
}
@StreamListener("countries")
@SendTo("daily-statistic")
public KStream<?, List<DailyStatistics>> daily(KStream<Object, Country> input) {
return input
.groupBy((key, value) -> value.getCountryCode())
.aggregate(this::initializeDailyStatistics,
this::dailyStatistics,
materializedAsPersistentStore("daily", Serdes.String(),
Serdes.serdeFrom(new JsonSerializer<>(),
new JsonDeserializer<>(List.class))))
.toStream()
.map((key, value) -> new KeyValue<>(null, value));
}
但是当我启动springboot应用程序时,我得到了这个错误。
Exception in thread "kafka-stream-f4f8166b-cbeb-42ca-b461-2b3a23885a5d-StreamThread-1" java.lang.IllegalStateException: Consumer was assigned partitions [kafka-stream-daily-repartition-0] which didn't correspond to subscription request [kafka-stream-countries-repartition, countries]
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.handleAssignmentMismatch(ConsumerCoordinator.java:218)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:264)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:424)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:358)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:353)
at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1251)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1216)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1201)
at org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:963)
at org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:863)
at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:819)
at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:788)
我想每个streamlistener方法都需要单独的应用程序id,但是如果我在听同一个主题,如何在application.yml文件中配置它呢?
2条答案
按热度按时间qpgpyjmq1#
您需要提供两个独立的输入绑定(这两个绑定都可以指向同一主题)。不能在多个服务器上使用相同的绑定名称
StreamListener
s。然后您可以设置application.id
对于多个StreamListener
基于输入绑定的处理器。例如。和
参见参考文件中的本节。
iqih9akk2#
你读了两遍“国家”专题,如果你读一次“国家”,并将数据发送到“每日统计”和“汇总统计”会更好。
读两遍和并发处理是两码事。如果需要并发性,请配置此参数:
您可以使用如下拓扑: