[HDFS-9941] Do not log StandbyException on NN, other minor logging fixes

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: namenode
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 11/Mar/16 00:16
• Updated: 24/Jan/19 10:35
• Resolved: 14/Mar/16 17:47

Description

The NameNode can skip logging StandbyException messages. These are seen regularly in normal operation and convey no useful information.

We no longer log the locations of newly allocated blocks in 2.8.0. The DN IDs can be useful for debugging so let's add that back.

Issue Links

• links to: GitHub Pull Request #83