Mingliang Liu created HDFS-11008:

             Summary: Add unit test for parsing "-source" parameter in Balancer 
                 Key: HDFS-11008
                 URL: https://issues.apache.org/jira/browse/HDFS-11008
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Mingliang Liu
            Assignee: Mingliang Liu

[HDFS-8826] added an option to specify the source node list so that balancer 
only selects blocks to move from those nodes. This is very efficient in some 

The unit test of {{-source}} option parsing is missing, for both valid and 
invalid cases. This JIRA is to track the effort of adding unit test for that. 
In fact, we can refactor the existing code by replacing code that manually 
creates {{BalancerParameters}} with new code that explores the 

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