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From Tony Liu <jiangtao....@zuora.com.INVALID>
Subject Lots of warning log related with `expected version 10 failed due to nul`
Date Thu, 02 Aug 2018 18:42:16 GMT
Hi Guys,

I found lots of warning log in broker's server.log, any idea you have ?  my
major concern why `failed due to null` will happen ? can I see it zookeeper
not available at that moment ?

WARNING log :

[2018-07-20 20:47:34,868] WARN  Conditional update of path
/brokers/topics/HeartBeat/partitions/0/state with data
{"controller_epoch":4,"leader":1005,"version":1,"leader_epoch":6,"isr":[1005]}
and expected version 10 failed due to null (kafka.utils.ZkUtils)
Host: ip-10-233-35-201  Name: /ecs/data/kafka/logs/server.log

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