TengYao Chi created KAFKA-21334:
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Summary: Test close() while async bootstrap DNS resolution is
still pending
Key: KAFKA-21334
URL: https://issues.apache.org/jira/browse/KAFKA-21334
Project: Kafka
Issue Type: Sub-task
Components: clients
Reporter: TengYao Chi
Assignee: TengYao Chi
NetworkClient#close() cancels any pending bootstrap resolution and shuts down
the kafka-bootstrap-dns-resolver executor.
Every existing test that reaches close() under async bootstrap configuration
does so only after the resolution has already failed/timed out, so this
cancellation/shutdown path is unverified.
Add a unit test that calls close() while a resolution is genuinely still
pending.
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