[
https://issues.apache.org/jira/browse/KAFKA-5256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015805#comment-16015805
]
Damian Guy commented on KAFKA-5256:
-----------------------------------
>From 0.11.0 onwards we will always have a checkpoint unless exactly once is
>turned on. See: https://issues.apache.org/jira/browse/KAFKA-4317
If exactly once is on then we will have to delete the db and restore from
scratch. I assume this is being done as part of that work? [~mjsax] [~guozhang]
> Non-checkpointed state stores should be deleted before restore
> --------------------------------------------------------------
>
> Key: KAFKA-5256
> URL: https://issues.apache.org/jira/browse/KAFKA-5256
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.1
> Reporter: Tommy Becker
>
> Currently, Kafka Streams will re-use an existing state store even if there is
> no checkpoint for it. This seems both inefficient (because duplicate inserts
> can be made on restore) and incorrect (records which have been deleted from
> the backing topic may still exist in the store). Since the contents of a
> store with no checkpoint are unknown, the best way to proceed would be to
> delete the store and recreate before restoring.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
