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Status

Current state: Under Discussion Accepted

Discussion thread: here [Change the link from the KIP proposal email archive to your own email thread] 

Vote thread: here 

JIRA:

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If the `Producer` detects that the `flush` method is invoked within the callback of the `close` method, throw a `KafkaException`.

This approach would require modifying org.apache.kafka.clients.producer.Producer#flush  to include KafkaException .

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If the `Producer` detects that the `flush` method is invoked within the callback of the `close` method, log an error message.

Reason for Rejection

Although adding an error log message could help users understand what happened, it does not provide sufficient protection.

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