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Posted to jira@kafka.apache.org by "Guozhang Wang (JIRA)" <ji...@apache.org> on 2019/05/08 00:11:00 UTC
[jira] [Updated] (KAFKA-8318) Session Window Aggregations generate
an extra tombstone
[ https://issues.apache.org/jira/browse/KAFKA-8318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Guozhang Wang updated KAFKA-8318:
---------------------------------
Labels: newbie++ (was: )
> Session Window Aggregations generate an extra tombstone
> -------------------------------------------------------
>
> Key: KAFKA-8318
> URL: https://issues.apache.org/jira/browse/KAFKA-8318
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: John Roesler
> Priority: Minor
> Labels: newbie++
>
> See the discussion https://github.com/apache/kafka/pull/6654#discussion_r280231439
> The session merging logic generates a tombstone in addition to an update when the session window already exists. It's not a correctness issue, just a small performance hit, because that tombstone is immediately invalidated by the update.
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