[ORC-475] ORC reader should lazily get filesystem

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5.5, 1.6.0
• Fix Version/s: 1.5.5, 1.6.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 06/Mar/19 22:52
• Updated: 15/Nov/19 06:56
• Resolved: 11/Mar/19 14:57

Description

Get filesystem can be expensive for blob storage or when fs cache is not used. When orc tail is specified via reader options, orc reader doesn't have to eagerly get filesystem as it won't use it anyways. 

Issue Links

• is required by: HIVE-22499 LLAP: Add an EncodedReaderOptions to extend ORC impl for options
• is required by: ORC-570 FS: ReaderOptions.filesystem should also accept a lazy Supplier
• links to: GitHub Pull Request #371