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https://issues.apache.org/jira/browse/KAFKA-4871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma resolved KAFKA-4871.
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Resolution: Duplicate
Duplicate of KAFKA-5473.
> Kafka doesn't respect TTL on Zookeeper hostname - crash if zookeeper IP
> changes
> -------------------------------------------------------------------------------
>
> Key: KAFKA-4871
> URL: https://issues.apache.org/jira/browse/KAFKA-4871
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.2.0
> Reporter: Stephane Maarek
>
> I had a Zookeeper cluster that automatically obtains hostname so that they
> remain constant over time. I deleted my 3 zookeeper machines and new machines
> came back online, with the same hostname, and they updated their CNAME
> Kafka then failed and couldn't reconnect to Zookeeper as it didn't try to
> resolve the IP of Zookeeper again. See log below:
> [2017-03-09 05:49:57,302] INFO Client will use GSSAPI as SASL mechanism.
> (org.apache.zookeeper.client.ZooKeeperSaslClient)
> [2017-03-09 05:49:57,302] INFO Opening socket connection to server
> zookeeper-3.example.com/10.12.79.43:2181. Will attempt to SASL-authenticate
> using Login Context section 'Client' (org.apache.zookeeper.ClientCnxn)
> [ec2-user]$ dig +short zookeeper-3.example.com
> 10.12.79.36
> As you can see even though the machine is capable of finding the new
> hostname, Kafka somehow didn't respect the TTL (was set to 60 seconds) and
> didn't get the new IP. I feel that on failed Zookeeper connection, Kafka
> should at least try to resolve the new Zookeeper IP. That allows Kafka to
> keep up with Zookeeper changes over time
> What do you think? Is that expected behaviour or a bug?
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