kevy liu created HDFS-11871:
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Summary: Parameter Usage Error
Key: HDFS-11871
URL: https://issues.apache.org/jira/browse/HDFS-11871
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer & mover
Affects Versions: 2.7.3
Reporter: kevy liu
Priority: Trivial
[hadoop@bigdata-hdp-apache505 hadoop-2.7.2]$ bin/hdfs balancer -h
Usage: hdfs balancer
[-policy <policy>] the balancing policy: datanode or blockpool
[-threshold <threshold>] Percentage of disk capacity
[-exclude [-f <hosts-file> | <comma-separated list of hosts>]]
Excludes the specified datanodes.
[-include [-f <hosts-file> | <comma-separated list of hosts>]]
Includes only the specified datanodes.
[-idleiterations <idleiterations>] Number of consecutive idle
iterations (-1 for Infinite) before exit.
Parameter Description:
-f <hosts-file> | <comma-separated list of hosts>
The parse separator in the code is:
String[] nodes = line.split("[ \t\n\f\r]+");
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