[HDFS-11140] Directory Scanner should log startup message time correctly

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.8.0, 3.0.0-alpha2
• Labels: newbie
• Hadoop Flags: Reviewed
• Assignee: Yiqun Lin
• Reporter: Xiao Chen
• Created: 15/Nov/16 02:28
• Updated: 08/Dec/16 05:00
• Resolved: 08/Dec/16 04:46

Description

When DirectoryScanner is enabled, one can see the following log:

INFO org.apache.hadoop.hdfs.server.datanode.DirectoryScanner: Periodic 
Directory Tree Verification scan starting at 1479189895562ms with interval of 21600000ms

The first is epoch time and should not have 'ms'. Or better yet, we can change it to a human-readable format.