Kafka:不断获取 FETCH_SESSION_ID_NOT_FOUND [英] Kafka: Continuously getting FETCH_SESSION_ID_NOT_FOUND

问题描述

我不断收到 FETCH_SESSION_ID_NOT_FOUND.我不确定为什么会这样.任何人都可以请我在这里问题是什么以及对消费者和经纪人的影响是什么.

I am continuously getting FETCH_SESSION_ID_NOT_FOUND. I'm not sure why its happening. Can anyone please me here what is the problem and what will be the impact on consumers and brokers.

Kafka 服务器日志:

Kafka Server Log:

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.

Kafka 消费者日志:

Kafka Consumer Log:

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.

集群详细信息:

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) 

推荐答案

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

Increase the value of max.incremental.fetch.session.cache.slots. The default value is 1K, in my case I have increased it to 10K and it fixed.

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