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https://issues.apache.org/jira/browse/KAFKA-8592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajini Sivaram resolved KAFKA-8592.
-----------------------------------
Resolution: Fixed
> Broker Dynamic Configuration fails to resolve variables as per KIP-421
> -----------------------------------------------------------------------
>
> Key: KAFKA-8592
> URL: https://issues.apache.org/jira/browse/KAFKA-8592
> Project: Kafka
> Issue Type: Bug
> Components: config
> Affects Versions: 2.3.0
> Reporter: TEJAL ADSUL
> Priority: Major
> Fix For: 2.3.1
>
>
> In add/alter new configs for DynamicConfigs it does not go through the
> KafkaConfig
> eg: bin/kafka-configs --bootstrap-server localhost:9092 --entity-type brokers
> --entity-name 0 --alter --add-config log.cleaner.threads=2
> However the bootstrap-server localhost is parsed through the kafkaConfig to
> create the adminClient but not the log.cleaner.thread.
> As the configs are not parsed using the KafkaConfig if we pass variables in
> configs they are bot resolved at run time.
> In order to resolve the variables in alterConfig/addConfigs flow we need to
> parse the new configs using KafkaConfig before they are parsed.
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