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https://issues.apache.org/jira/browse/FLINK-17015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17110197#comment-17110197
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Yu Li commented on FLINK-17015:
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[~jark] is this a critical bug that need to be fixed in 1.11.0? Asking since
I'm considering whether the dependent issue FLINK-17610 could be deferred to
1.12. Thanks.
> Fix NPE from NullAwareMapIterator
> ---------------------------------
>
> Key: FLINK-17015
> URL: https://issues.apache.org/jira/browse/FLINK-17015
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: Jark Wu
> Priority: Major
> Labels: pull-request-available
> Attachments: 92164295_3052056384855585_3776552648744894464_o.jpg
>
>
> When using Heap statebackend, the underlying
> {{org.apache.flink.runtime.state.heap.HeapMapState#iterator}} may return a
> null iterator. It results in the {{NullAwareMapIterator}} holds a null
> iterator and throws NPE in the following {{NullAwareMapIterator#hasNext}}
> invocking.
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