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https://issues.apache.org/jira/browse/KAFKA-2733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15050151#comment-15050151
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ASF GitHub Bot commented on KAFKA-2733:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/643
> Distinguish metric names inside the sensor registry
> ---------------------------------------------------
>
> Key: KAFKA-2733
> URL: https://issues.apache.org/jira/browse/KAFKA-2733
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Guozhang Wang
> Assignee: Guozhang Wang
> Fix For: 0.9.1.0
>
>
> Since stream tasks can share the same StreamingMetrics object, and the
> MetricName is distinguishable only by the group name (same for the same type
> of states, and for other streaming metrics) and the tags (currently only the
> client-ids of the StreamThead), when we have multiple tasks within a single
> stream thread, it could lead to IllegalStateException upon trying to registry
> the same metric from those tasks.
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