chernyih commented on PR #12131:
URL: https://github.com/apache/kafka/pull/12131#issuecomment-1123948985
Do you think the following comments help to clear things up? If yes, I can
add the comments to `checkingApiVersions` function.
// At this state, the connection setup might not have completed yet.
Consider the case where
// client sets the security protocol as PLAINTEXT and the server
security protocol is SSL.
// Client considers the connection setup has completed at this
state, whereas in reality
// the connection setup has not completed yet. When API version
request is sent, disconnect will
// happen. Reconnect backoff is not reset to prevent fast reconnect.
It will be reset after the API
// version request succeeds. Connection setup timeout is reset
because from client perspective,
// the connection setup has completed.
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