Andrew Wang created HDFS-8549:
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Summary: Abort the balancer if an upgrade is in progress
Key: HDFS-8549
URL: https://issues.apache.org/jira/browse/HDFS-8549
Project: Hadoop HDFS
Issue Type: Improvement
Components: balancer & mover
Affects Versions: 2.7.0
Reporter: Andrew Wang
Assignee: Andrew Wang
Running the balancer during an ongoing upgrade has a negative affect, since DNs
do not actually delete blocks. This means the balancer is making lots of extra
replicas and not actually reducing the disk utilization of over-utilized nodes.
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