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https://issues.apache.org/jira/browse/FLINK-7700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16184279#comment-16184279
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ASF GitHub Bot commented on FLINK-7700:
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/4731
I think it would be good to have an abstraction for that, yes.
> State merging in RocksDB backend leaves old state
> -------------------------------------------------
>
> Key: FLINK-7700
> URL: https://issues.apache.org/jira/browse/FLINK-7700
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.4.0, 1.3.2
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Blocker
> Fix For: 1.4.0, 1.3.3
>
>
> {{RocksDBAggregatingState.mergeNamespaces(...)}},
> {{RocksDBReducingState.mergeNamespaces(...)}}, and
> {{RocksDBListState.mergeNamespaces(...)}} don't remove state from the old
> location when merging. This means that merged state will never be cleaned up
> and will accumulate.
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