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Posted to users@kafka.apache.org by 熊永鑫 <xi...@hotmail.com> on 2021/05/17 07:37:06 UTC

a zk-session-expiry issue

Hi，

When we use Kafka, we find a strange issue:

Once Kafka has a zk-session-expiry exception , a large number of isr shrink, and zk request’s latency is high.

Metrics from jmx:
[cid:D3CD0A0D-58EA-4328-ADB3-F68F7ECEE962]
[cid:E68F4EA5-44F9-46EA-9F67-378FEDB7AAD1]

When we get broker’s jstack,we find  zk-session-expiry-handler0-SendThread continuous in broker’s process.

[cid:BE5BF7D6-49B6-4706-86E9-E03D3F0D4A9F]



Our kafka version is 2.2.0, we find a issue (https://issues.apache.org/jira/browse/KAFKA-8121) which may be related to this. Is this a fatal issue?