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https://issues.apache.org/jira/browse/KAFKA-7367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601221#comment-16601221
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Matthias J. Sax commented on KAFKA-7367:
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> We have gotten some reports
Jira? Could we verify the report? Or do we understand the issue already and
this ticket is about fixing the problem (it sounds like it's about adding tests
only)?
> Verify that Streams never creates RocksDB stores unless they are needed
> -----------------------------------------------------------------------
>
> Key: KAFKA-7367
> URL: https://issues.apache.org/jira/browse/KAFKA-7367
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: John Roesler
> Priority: Major
> Labels: newbie
>
> We have gotten some reports of Streams creating RocksDB stores unnecessarily
> for stateless processes.
> We can and should verify this doesn't happen by creating integration tests
> for *every* stateless operator that verify that after processing, the state
> directory is still empty.
> These tests could potentially be backported as far as we care to so that we
> can identify and fix potential unnecessary stores in past versions as well.
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