[HBASE-19551] hbck -boundaries doesn't work correctly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.1, 1.3.3
• Component/s: hbck
• Hadoop Flags: Reviewed
• Assignee: Toshihiro Suzuki
• Reporter: Toshihiro Suzuki
• Created: 18/Dec/17 18:13
• Updated: 01/Feb/19 19:58
• Resolved: 31/Dec/17 07:19

Description

Currently, in HBaseFsck#checkRegionBoundaries(), it seems like keys from reader.getFirstKey() and reader.getLastKey() are directly compared by ByteArrayComparator:

https://github.com/apache/hbase/blob/9d0c7c6dfbcba0907cbbc2244eac570fcc4d58a5/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java#L864-L865
https://github.com/apache/hbase/blob/9d0c7c6dfbcba0907cbbc2244eac570fcc4d58a5/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java#L869-L870

This is not correct because the keys consist of a key length and key itself. We should compare rowkeys or the only key itself (by removing a key length).