apache-kafka - Kafka：不断获取 FETCH_SESSION_ID_NOT_FOUND

Question

我不断收到 FETCH_SESSION_ID_NOT_FOUND。我不确定它为什么会发生。任何人都可以请我这里有什么问题以及对消费者和经纪人的影响是什么。

卡夫卡服务器日志：

INFO [2019-10-18 12:09:00,709] [ReplicaFetcherThread-1-8][] org.apache.kafka.clients.FetchSessionHandler - [ReplicaFetcher replicaId=6, leaderId=8, fetcherId=1] Node 8 was unable to process the fetch request with (sessionId=258818904, epoch=2233): FETCH_SESSION_ID_NOT_FOUND.
 INFO [2019-10-18 12:09:01,078] [ReplicaFetcherThread-44-10][] org.apache.kafka.clients.FetchSessionHandler - [ReplicaFetcher replicaId=6, leaderId=10, fetcherId=44] Node 10 was unable to process the fetch request with (sessionId=518415741, epoch=4416): FETCH_SESSION_ID_NOT_FOUND.
 INFO [2019-10-18 12:09:01,890] [ReplicaFetcherThread-32-9][] org.apache.kafka.clients.FetchSessionHandler - [ReplicaFetcher replicaId=6, leaderId=9, fetcherId=32] Node 9 was unable to process the fetch request with (sessionId=418200413, epoch=3634): FETCH_SESSION_ID_NOT_FOUND.

卡夫卡消费者日志：

12:29:58,936 INFO  [FetchSessionHandler:383] [Consumer clientId=bannerGroupMap#87e2af7cf742#test, groupId=bannerGroupMap#87e2af7cf742#test] Node 8 was unable to process the fetch request with (sessionId=1368981303, epoch=60): FETCH_SESSION_ID_NOT_FOUND.
12:29:58,937 INFO  [FetchSessionHandler:383] [Consumer clientId=bannerGroupMap#87e2af7cf742#test, groupId=bannerGroupMap#87e2af7cf742#test] Node 3 was unable to process the fetch request with (sessionId=1521862194, epoch=59): FETCH_SESSION_ID_NOT_FOUND.
12:29:59,939 INFO  [FetchSessionHandler:383] [Consumer clientId=zoneGroupMap#87e2af7cf742#test, groupId=zoneGroupMap#87e2af7cf742#test] Node 7 was unable to process the fetch request with (sessionId=868804875, epoch=58): FETCH_SESSION_ID_NOT_FOUND.
12:30:06,952 INFO  [FetchSessionHandler:383] [Consumer clientId=creativeMap#87e2af7cf742#test, groupId=creativeMap#87e2af7cf742#test] Node 3 was unable to process the fetch request with (sessionId=1135396084, epoch=58): FETCH_SESSION_ID_NOT_FOUND.
12:30:12,965 INFO  [FetchSessionHandler:383] [Consumer clientId=creativeMap#87e2af7cf742#test, groupId=creativeMap#87e2af7cf742#test] Node 6 was unable to process the fetch request with (sessionId=1346340004, epoch=56): FETCH_SESSION_ID_NOT_FOUND.

集群详情：

Broker: 13 (1 Broker : 14 cores & 36GB memory)
Kafka cluster version: 2.0.0
Kafka Java client version: 2.0.0
Number topics: ~15. 
Number of consumers: 7K (all independent and manually assigned all partitions of a topic to a consumers. One consumer is consuming all partitions from a topic only) 

标签： apache-kafka

Answer 1

增加 的值max.incremental.fetch.session.cache.slots。默认值为 1K，在我的情况下，我已将其增加到 10K 并已修复。