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https://issues.apache.org/jira/browse/FLINK-5606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17202024#comment-17202024
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Matthias commented on FLINK-5606:
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[~kkl0u] Is this still necessary to get fixed ([source
code|https://github.com/apache/flink/blob/e6a318c420aceecfa86810db4c280fcb6bcd5a8b/flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/client/state/serialization/KvStateSerializer.java#L68])?
Or can we close this issue?
> Remove magic number in key and namespace serialization
> ------------------------------------------------------
>
> Key: FLINK-5606
> URL: https://issues.apache.org/jira/browse/FLINK-5606
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Queryable State
> Reporter: Ufuk Celebi
> Assignee: Kostas Kloudas
> Priority: Minor
>
> The serialized key and namespace for state queries contains a magic number
> between the key and namespace: {{key|42|namespace}}. This was for historical
> reasons in order to skip deserialization of the key and namespace for our old
> {{RocksDBStateBackend}} which used the same format. This has now been
> superseded by the keygroup aware state backends and there is no point in
> doing this.
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