[HBASE-23741] Data loss when WAL split to HFile enabled

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.3.0
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Component/s: MTTR
• Assignee: Guanghao Zhang
• Reporter: Pankaj Kumar
• Created: 27/Jan/20 06:30
• Updated: 29/Jun/20 15:19
• Resolved: 23/Mar/20 15:24

Description

Very simple steps as below,
1. Create table with 1 region
2. Insert 1 record
3. Flush the table
4. Scan table and observe timestamp of the inserted row
5. Insert same row key with same timestamp as previously inserted but with different value
6. Kill -9 RS where table region is online
7. Start RS

Scan the table and check the result, latest cell must be returned.

Thanks sreenivasulureddy for finding this issue.

Issue Links

• is broken by: HBASE-23286 Improve MTTR: Split WAL to HFile
• is related to: HBASE-23634 Enable "Split WAL to HFile" by default
• links to: GitHub Pull Request #1254