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https://issues.apache.org/jira/browse/HDFS-12948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16310650#comment-16310650
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Yiqun Lin commented on HDFS-12948:
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LGTM, +1. Will commit this shortly.
> DiskBalancer report command top option should only take positive numeric
> values
> -------------------------------------------------------------------------------
>
> Key: HDFS-12948
> URL: https://issues.apache.org/jira/browse/HDFS-12948
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Minor
> Attachments: HDFS-12948.001.patch, HDFS-12948.002.patch
>
>
> Currently , diskBalancer report command "top" option takes values like "AAA"
> as well negative/decimal values and gives output. These invalid values should
> not be processed and some error/warning should be given.
> For Example,
> $ hdfs diskbalancer -report -top -100
> 17/12/19 15:07:01 INFO command.Command: Processing report command
> 17/12/19 15:07:02 INFO balancer.KeyManager: Block token params received from
> NN: update interval=10hrs, 0sec, token lifetime=10hrs, 0sec
> 17/12/19 15:07:02 INFO block.BlockTokenSecretManager: Setting block keys
> 17/12/19 15:07:02 INFO balancer.KeyManager: Update block keys every 2hrs,
> 30mins, 0sec
> 17/12/19 15:07:02 INFO command.Command: Reporting top -100 DataNode(s)
> benefiting from running DiskBalancer.
> Processing report command
> Reporting top -100 DataNode(s) benefiting from running DiskBalancer.
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