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Posted to jira@kafka.apache.org by "Jason Gustafson (JIRA)" <ji...@apache.org> on 2019/08/14 23:05:00 UTC
[jira] [Assigned] (KAFKA-8806) Kafka.poll spends significant amount
of time in KafkaConsumer.updateAssignmentMetadataIfNeeded
[ https://issues.apache.org/jira/browse/KAFKA-8806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jason Gustafson reassigned KAFKA-8806:
--------------------------------------
Assignee: David Arthur
> Kafka.poll spends significant amount of time in KafkaConsumer.updateAssignmentMetadataIfNeeded
> ----------------------------------------------------------------------------------------------
>
> Key: KAFKA-8806
> URL: https://issues.apache.org/jira/browse/KAFKA-8806
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.3.0
> Reporter: Xavier Léauté
> Assignee: David Arthur
> Priority: Major
>
> Comparing the performance profile of 2.2.0 and 2.3.0, we are seeing significant performance differences in the {{KafkaConumer.updateAssignmentMetadataIfNeeded()}} method.
> The call to {{KafkaConsumer.updateAssignmentMetadataIfNeeded()}} now represents roughly 40% of CPU time spent in {{KafkaConsumer.poll()}}, when before it only represented less than 2%.
> Most of the extra time appears to be spent in {{KafkaConsumer.validateOffsetsIfNeeded()}}, which did not show up in previous profiles.
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