[HDFS-10588] False alarm in datanode log - ERROR - Disk Balancer is not enabled

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha1
• Component/s: datanode, hdfs
• Labels: supportability
• Assignee: Weiwei Yang
• Reporter: Weiwei Yang
• Created: 29/Jun/16 03:07
• Updated: 02/Oct/19 17:13
• Resolved: 05/Aug/16 02:45

Description

Noticed error message in namenode log

2016-06-28 19:49:12,221 ERROR datanode.DiskBalancer (DiskBalancer.java:checkDiskBalancerEnabled(297)) - Disk Balancer is not enabled.

even with default configuration dfs.disk.balancer.enabled=false.This is triggered when accessing datanode web UI, because DataNode#getDiskBalancerStatus calls the check.