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https://issues.apache.org/jira/browse/HBASE-5579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13229970#comment-13229970
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Daniel Gómez Ferro commented on HBASE-5579:
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0 wasn't counting before the change. There were 4 versions (0 to 3), the test
removed version 1 and assumed "0 doesn't count" so it expected 2 versions.
With this fix, 0 does indeed count and it expects 3 versions correctly.
If we set/check -1 we would have the same problem with version -1, a delete
with version > -1 would also mask values inserted at timestamp -1.
> A Delete Version could mask other values
> ----------------------------------------
>
> Key: HBASE-5579
> URL: https://issues.apache.org/jira/browse/HBASE-5579
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Daniel Gómez Ferro
> Attachments: HBASE-5579.patch
>
>
> A Delete Version operation mask values that have version = 0. The problem
> happens at ScanDeleteTracker.
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