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https://issues.apache.org/jira/browse/KAFKA-6793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16987977#comment-16987977
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Alex Mironov commented on KAFKA-6793:
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Hello [~mjsax], [~rhauch] — I'd like to bump up this problem as it continues to
nag us for quite some time now as well as people in
https://issues.apache.org/jira/browse/KAFKA-7509. My take on this is that
current implementation is overly opinionated on how it treats the missing
config options. I am a bit skeptical on the proposed "prefix" solution as it
effectively creates a magical variable that disappears between function calls.
It also requires a major change in the public-facing configuration options,
which sounds like an overkill for a logging-related problem.
How about we give users choice instead — e.g. by providing an interface through
which they can supply their own behaviour (+default implementation that "warns"
about missing options)? Otherwise, something as simple as providing an
additional config option to select the verbosity level for "logUnused"
reporting will be enough for most of the use-cases and will not require a major
change in existing user-facing configurations.
> Unnecessary warning log message
> --------------------------------
>
> Key: KAFKA-6793
> URL: https://issues.apache.org/jira/browse/KAFKA-6793
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 1.1.0
> Reporter: Anna O
> Priority: Minor
>
> When upgraded KafkaStreams from 0.11.0.2 to 1.1.0 the following warning log
> started to appear:
> level: WARN
> logger: org.apache.kafka.clients.consumer.ConsumerConfig
> message: The configuration 'admin.retries' was supplied but isn't a known
> config.
> The config is not explicitly supplied to the streams.
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