[HBASE-13945] Prefix_Tree seekBefore() does not work correctly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 0.98.2, 1.0.1, 1.1.0, 1.0.1.1, 1.1.0.1
• Fix Version/s: 0.98.14, 1.0.2, 1.2.0, 1.1.2, 1.3.0, 2.0.0
• Component/s: io
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 22/Jun/15 09:17
• Updated: 18/Dec/15 06:47
• Resolved: 24/Jun/15 03:50

Description

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

byte[] firstKeyInCurrentBlock = Bytes.getBytes(firstKey);

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.

Issue Links

• is related to: HBASE-13939 Make HFileReaderImpl.getFirstKeyInBlock() to return a Cell