[HADOOP-16464] S3Guard in auth mode doesn't raise AccessDeniedException on read of 0-byte file

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 3.3.0
• Component/s: fs/s3
• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 26/Jul/19 13:58
• Updated: 31/Jul/19 11:46
• Resolved: 31/Jul/19 11:46

Description

This falls out of auth mode knowing the length of a file and skipping any S3 checks: it is not an error to read a 0-byte file, regardless of the readability of the file.

• there's no check in open()
• and read() just returns -1.

I don't see if that is fixable, or if it merits. Maybe just include in the release notes