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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_3.patch
Updated patch. The getKeyValueBuffer (currently used only in tests) will now
do a rewind before returning the API so that the BB is useful instead of having
the position == limit.
The TestDataBlockEncoders passes with this change. Similar patch is applicable
for trunk and branch-1 also.
> 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: 1.0.0, 0.98.2, 1.0.1, 1.1.0, 1.0.1.1, 1.1.0.1
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 0.98.14, 1.0.2, 1.2.0, 1.1.1, 1.1.2, 1.3.0, 1.2.1
>
> Attachments: HBASE-13945_0.98.patch, HBASE-13945_0.98_1.patch,
> HBASE-13945_0.98_2.patch, HBASE-13945_0.98_3.patch,
> HBASE-13945_branch-1.1.patch, HBASE-13945_trunk.patch,
> HBASE-13945_trunk_1.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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