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https://issues.apache.org/jira/browse/KAFKA-6166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239760#comment-16239760
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Guozhang Wang commented on KAFKA-6166:
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That is right.
Today only the (producer/consumer-)defined property will be passed without the
prefix, indicating "apply this to producer/consumer". So that's why I used
{{interceptor.classes}} and {{metric.reporters}} as they are defined property
in both producer and consumer.
My thinking is that we should also pass non-defined / customized property like
the one in your example, "custom-key-for-metric-reporter". So your expectation
in the future is right as well.
> Streams configuration requires consumer. and producer. in order to be read
> --------------------------------------------------------------------------
>
> Key: KAFKA-6166
> URL: https://issues.apache.org/jira/browse/KAFKA-6166
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.11.0.0
> Environment: Kafka 0.11.0.0
> JDK 1.8
> CoreOS
> Reporter: Justin Manchester
> Priority: Minor
> Labels: newbie++, user-experience
>
> Problem:
> In previous release you could specify a custom metrics reporter like so:
> Properties config = new Properties();
> config.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka-broker1:9092");
> config.put(StreamsConfig.METRIC_REPORTER_CLASSES_CONFIG,
> "com.mycompany.MetricReporter");
> config.put("custom-key-for-metric-reporter", "value");
> From 0.11.0.0 onwards this is no longer possible, as you have to specify
> consumer.custom-key-for-metric-reporter or
> producer.custom-key-for-metric-reporter otherwise it's stripped out of the
> configuration.
> So, if you wish to use a metrics reporter and to collect producer and
> consumer metrics, as well as kafka-streams metrics, that you would need to
> specify 3 distinct configs:
> 1) consumer.custom-key-for-metric-reporter
> 2) producer.custom-key-for-metric-reporter
> 3) custom-key-for-metric-reporter
> This appears to be a regression.
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