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https://issues.apache.org/jira/browse/HBASE-13945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ramkrishna.s.vasudevan updated HBASE-13945:
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Attachment: HBASE-13945_0.98.patch
Patch for 0.98. In order to have a test case for this had to update the
TestSeekTo to use KVComparator as in branch-1 and above. The change in KVUtil
solves the case when the seekBefore updates the nextIndexKey to an empty value
thus leading to wrong or incorrect comparisons.
> [0.98] Prefix_Tree seekBefore() does not work correctly
> -------------------------------------------------------
>
> Key: HBASE-13945
> URL: https://issues.apache.org/jira/browse/HBASE-13945
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.2
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 0.98.14
>
> Attachments: HBASE-13945_0.98.patch
>
>
> This is related to the TestSeekTo test case where the seekBefore() does not
> work with Prefix_Tree because of an issue in getFirstKeyInBlock(). In the
> trunk and branch-1 changing the return type of getFirstKeyInBlock() from BB
> to Cell resolved the problem, but the same cannot be done in 0.98. Hence we
> need a change in the KvUtil.copyToNewBuffer API to handle this. Since the
> limit is made as the position - in seekBefore when we do
> {code}
> byte[] firstKeyInCurrentBlock = Bytes.getBytes(firstKey);
> {code}
> in HFileReaderV2.seekBefore() we end up in an empty byte array and it would
> not be the expected one based on which we try to seek to load a new block.
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