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https://issues.apache.org/jira/browse/KAFKA-18729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17923769#comment-17923769
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黃竣陽 commented on KAFKA-18729:
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Hello [~lianetm], If you won't work on this, may I take this?
> Improve consumer check for assigned topics from regex
> -----------------------------------------------------
>
> Key: KAFKA-18729
> URL: https://issues.apache.org/jira/browse/KAFKA-18729
> Project: Kafka
> Issue Type: Improvement
> Components: consumer
> Reporter: Lianet Magrans
> Priority: Major
> Fix For: 4.1.0
>
>
> When using subscriptions to broker-side regex RE2J, the consumer checks if a
> topic received in metadata is assigned in order to keep its info. At the
> moment, the consumer has no other way but to check the topic against the list
> of assigned topicPartitions (which is all that's available).
> We should consider improving the check to do it at the topic level, not
> topicPartition level . We would need to keep the set of assigned topics from
> RE2J regex in the subscription state, updated as assignments as reconciled
> and partitions are add/removed. Then we could rely on this topic set for the
> check (not all the assigned topicPartitions set)
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