[PHOENIX-4682] UngroupedAggregateRegionObserver preCompactScannerOpen hook should not throw exceptions

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.13.0
• Fix Version/s: 4.14.0, 5.0.0
• Assignee: Vincent Poon
• Reporter: Vincent Poon
• Created: 31/Mar/18 00:24
• Updated: 26/Jul/18 01:15
• Resolved: 09/Apr/18 21:26

Description

TableNotFoundException in the preCompactScannerOpen hook can lead to RS abort.

Some tables might have the phoenix coprocessor loaded but not be actual Phoenix tables (i.e. have a row in SYSTEM.CATALOG).  We should ignore these Exceptions instead of throwing them.