[HBASE-9889] Make sure we clean up scannerReadPoints upon any exceptions

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.89-fb, 0.94.12, 0.96.0
• Fix Version/s: 0.99.0
• Assignee: Amitanand Aiyer
• Reporter: Amitanand Aiyer
• Created: 04/Nov/13 19:00
• Updated: 21/Feb/15 23:31
• Resolved: 17/Dec/13 01:31

Description

If there is an exception in the creation of RegionScanner (for example, exception while opening store files) the scanner Read points is not cleaned up.

Having an unused old entry in the scannerReadPoints means that flushes and compactions cannot garbage-collect older versions.