[HDFS-16195] Fix log message when choosing storage groups for block movement in balancer

• Type: Improvement
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Component/s: balancer & mover
• Assignee: Preeti
• Reporter: Preeti
• Created: 29/Aug/21 21:15
• Updated: 14/Sep/21 13:04

Description

Correct the log message in line with the logic associated with
moving blocks in chooseStorageGroups() in the balancer. All log lines should indicate from which storage source the blocks are being moved correctly to avoid ambiguity. Right now one of the log lines is incorrect: https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java#L555 which indicates that storage blocks are moved from underUtilized to aboveAvgUtilized nodes, while it is actually the other way around in the code.