[HBASE-25378] Legacy comparator in Hfile trailer will fail to load

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.4.0, 2.3.2
• Fix Version/s: 3.0.0-alpha-1, 2.4.0
• Assignee: Pankaj Kumar
• Reporter: Pankaj Kumar
• Created: 09/Dec/20 13:13
• Updated: 16/Dec/20 17:52
• Resolved: 15/Dec/20 18:34

Description

HBASE-24968 moved MetaCellComparator out from CellComparatorImpl to avoid the deadlock issue. But this introduced compatibility issue, old hfile with comparator class as "org.apache.hadoop.hbase.CellComparator$MetaCellComparator" will fail to open due to ClassNotFoundException.

Also we should also handle the case when comparator class is "org.apache.hadoop.hbase.CellComparatorImpl$MetaCellComparator", which was case before HBASE-24968.

 

Issue Links

• links to: GitHub Pull Request #2756