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https://issues.apache.org/jira/browse/HBASE-4556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13124387#comment-13124387
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Lars Hofhansl commented on HBASE-4556:
--------------------------------------
Many scanners only return false when there are no more current KVs to return,
i.e. the passed kv list is also empty. But does not follow the contract of
InternalScanner.
> Fix all incorrect uses of InternalScanner.next(...)
> ---------------------------------------------------
>
> Key: HBASE-4556
> URL: https://issues.apache.org/jira/browse/HBASE-4556
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
>
> There are cases all over the code where InternalScanner.next(...) is not used
> correctly.
> I see this a lot:
> {code}
> while(scanner.next(...)) {
> }
> {code}
> The correct pattern is:
> {code}
> boolean more = false;
> do {
> more = scanner.next(...);
> } while (more);
> {code}
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