[TEZ-3540] Eliminate inefficient use of FileSystem API

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Assignee: Zhiyuan Yang
• Reporter: Zhiyuan Yang
• Created: 16/Nov/16 22:04
• Updated: 30/Nov/16 19:46

Description

As said in HADOOP-13427, there are certain inefficient call pattern on FileSystem like exists+open, exists+delete causing unnecessary RPC call to HDFS. Let's refactor them.

Issue Links

• is related to: HADOOP-13427 Eliminate needless uses of FileSystem#{exists(), isFile(), isDirectory()}