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https://issues.apache.org/jira/browse/FLINK-17610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Li reassigned FLINK-17610:
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Assignee: Nicholas Jiang
> Align the behavior of result of internal map state to return empty iterator
> ---------------------------------------------------------------------------
>
> Key: FLINK-17610
> URL: https://issues.apache.org/jira/browse/FLINK-17610
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Affects Versions: 1.11.0
> Reporter: Nicholas Jiang
> Assignee: Nicholas Jiang
> Priority: Minor
> Labels: pull-request-available
>
> There are different behaviors of result of internal map state. For
> HeapMapState, #entries(), #keys(), #values(), and #iterator() would all
> return null. However, for RocksDBMapState, #entries() would return null,
> while #keys(), #values(), #iterator() would return empty iterator.
> UserFacingMapState would align these behaviors to empty iterator for users,
> therefore this should better align these internal behavior to return empty
> iterator instead of null.
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