[HBASE-1233] Transactional fixes: Overly conservative scan read-set, potential CME

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.19.0
• Fix Version/s: 0.19.1, 0.20.0
• Component/s: regionserver
• Assignee: Clint Morgan
• Reporter: Clint Morgan
• Created: 03/Mar/09 00:05
• Updated: 13/Sep/09 22:24
• Resolved: 03/Mar/09 19:52

Description

This patch fixes two issues with the OCC transactions:

• Overly conservative read-set. Previously a scanner was claiming read set on the whole region. This patch gets the read set from the start and end keys that a scanner was opened with (the start key comes from the arg to open, the end key comes from a WhileMatch(StopRow()) filter if present.

• A potential ConcurrentModificationException.