[HBASE-13807] [0.98] NoTagsKeyValue optimization is not proper

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.13
• Fix Version/s: 0.98.13
• Hadoop Flags: Reviewed
• Assignee: Anoop Sam John
• Reporter: Anoop Sam John
• Created: 29/May/15 11:44
• Updated: 20/Nov/15 11:55
• Resolved: 30/May/15 03:26

Description

When the file format is V2, it has no support for tags and so cells will be with 0 tags length. For such cells we make NoTagsKeyValue which avoid getTagsLength parsing overhead in KeyValue. Still HFileReaderV2 creates KeyValue.
This is a 0.98 issue only.
Also in case of DBE, we can consider the tags length and return KeyValue/NoTagsKeyValue