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?
