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https://issues.apache.org/jira/browse/KAFKA-13879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chern Yih Cheah resolved KAFKA-13879.
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Resolution: Fixed
> Exponential backoff for reconnect does not work
> -----------------------------------------------
>
> Key: KAFKA-13879
> URL: https://issues.apache.org/jira/browse/KAFKA-13879
> Project: Kafka
> Issue Type: Bug
> Components: network
> Affects Versions: 2.7.0
> Reporter: Chern Yih Cheah
> Assignee: Chern Yih Cheah
> Priority: Minor
>
> When a client connects to a SSL listener using PLAINTEXT security protocol,
> after the TCP connection is setup, the client considers the channel setup is
> complete (in reality the channel setup is not complete yet). The client
> issues API version request after that. When issuing API version request,
> reconnection exponential backoff is reset. Since the broker expects SSL
> handshake, client's API version request will cause the connection to
> disconnect. Reconnect will happen without exponential backoff since it has
> been reset.
> [https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/ClusterConnectionStates.java#L249.]
>
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