Ismael Juma created KAFKA-4808:
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Summary: send of null key to a compacted topic should throw error
back to user
Key: KAFKA-4808
URL: https://issues.apache.org/jira/browse/KAFKA-4808
Project: Kafka
Issue Type: Bug
Components: producer
Affects Versions: 0.10.2.0
Reporter: Ismael Juma
Fix For: 0.10.3.0
If a message with a null key is produced to a compacted topic, the broker
returns `CorruptRecordException`, which is a retriable exception. As such, the
producer keeps retrying until retries are exhausted or request.timeout.ms
expires and eventually throws a TimeoutException. This is confusing and not
user-friendly.
We should throw a meaningful error back to the user. From an implementation
perspective, we would have to use a non retriable error code to avoid this
issue.
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