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https://issues.apache.org/jira/browse/KUDU-1402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15230931#comment-15230931
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Jean-Daniel Cryans commented on KUDU-1402:
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close calls flush so I guess there's that too.
> KuduSession.flush can return null or presumably an empty list
> -------------------------------------------------------------
>
> Key: KUDU-1402
> URL: https://issues.apache.org/jira/browse/KUDU-1402
> Project: Kudu
> Issue Type: Improvement
> Affects Versions: 0.7.0
> Reporter: Brock Noland
> Priority: Minor
>
> I was surprised that {{KuduSession.flush}} can return null since it's
> returning a list. It'd be nicer to return an empty list instead of null.
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