[HDFS-8315] Datanode does not log reads

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Won't Fix
• Labels: BB2015-05-TBR
• Target Version/s: 2.7.1
• Assignee: Kihwal Lee
• Reporter: Kihwal Lee
• Created: 04/May/15 17:50
• Updated: 08/May/15 15:22
• Resolved: 08/May/15 15:22

Description

HDFS-6836 made datanode read request logging DEBUG. There is a good reason why it was at INFO for so many years. This is very useful in debugging load issues. This jira will revert HDFS-6836.

We haven't seen it being a bottleneck on busy hbase clusters, but if someone thinks it is a serious overhead, please make it configurable in a separate jira.

Issue Links

• is broken by: HDFS-6836 HDFS INFO logging is verbose & uses file appenders