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https://issues.apache.org/jira/browse/KAFKA-7780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16734121#comment-16734121
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ASF GitHub Bot commented on KAFKA-7780:
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ManoharVanam commented on pull request #6088: [KAFKA-7780] Kafka client should
validate topic-level configs and update only unique values
URL: https://github.com/apache/kafka/pull/6088
**User Interface Improvement :** Kafka client should validate topic-level
configs, and throw exception in case of invalid (duplicate) config values.
**Example:** ./kafka-topics.sh --create --topic test --partitions 2
--replication-factor 1 --zookeeper localhost:2181 --config
cleanup.policy=delete,compact,delete
should throw exception like
Invalid value delete,compact,delete for configuration cleanup.policy:
Contains duplicate values
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> Kafka client should validate topic-level configs and update only unique values
> ------------------------------------------------------------------------------
>
> Key: KAFKA-7780
> URL: https://issues.apache.org/jira/browse/KAFKA-7780
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 2.1.0
> Reporter: Manohar Vanam
> Assignee: Manohar Vanam
> Priority: Minor
>
> Kafka client should validate topic-level configs and update only unique
> values.
> Current behaviour:
> {code:java}
> ./kafka-topics.sh --create --topic dummy28 --partitions 2
> --replication-factor 1 --zookeeper localhost:2181 --config
> cleanup.policy=delete,compact,delete
> Created topic "dummy28".
> ./kafka-topics.sh --describe --topic dummy28 --zookeeper localhost:2181
> Topic:dummy28 PartitionCount:2 ReplicationFactor:1
> Configs:cleanup.policy=*delete,compact,delete*
> Topic: dummy28 Partition: 0 Leader: 0 Replicas: 0 Isr: 0
> Topic: dummy28 Partition: 1 Leader: 0 Replicas: 0 Isr: 0{code}
> Expected behaviour:
> {code:java}
> ./kafka-topics.sh --describe --topic dummy28 --zookeeper localhost:2181
> Topic:dummy28 PartitionCount:2 ReplicationFactor:1
> Configs:cleanup.policy=delete,compact
> Topic: dummy28 Partition: 0 Leader: 0 Replicas: 0 Isr: 0
> Topic: dummy28 Partition: 1 Leader: 0 Replicas: 0 Isr: 0
> {code}
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