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https://issues.apache.org/jira/browse/HBASE-21152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16815921#comment-16815921
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Biju Nair commented on HBASE-21152:
-----------------------------------
If {{status}} is used as a parameter for a shell command for e.g. {{describe
status}} then {{status}} gets executed as a command followed by the user
intended command i.e. {{describe}}. Looks like a broader issues and not
confined to {{balance_switch}} command alone.
> Add parameter validations for commands in HBase shell
> -----------------------------------------------------
>
> Key: HBASE-21152
> URL: https://issues.apache.org/jira/browse/HBASE-21152
> Project: HBase
> Issue Type: Improvement
> Components: Balancer, shell
> Reporter: Toshihiro Suzuki
> Assignee: Toshihiro Suzuki
> Priority: Major
>
> One of our customers got confused with "balance_switch" command in HBase
> shell.
> They mistakenly ran "balance_swich status" command instead of
> "balancer_enabled" command to see if the balancer is enabled. However, like
> the following, it didn't cause any errors and it looks like the command was
> successful.
> {code}
> hbase> balance_switch status
> 1 active master, 0 backup masters, 1 servers, 0 dead, 2.0000 average load
> Took 0.0055 seconds
> Previous balancer state : true
> Took 0.0041 seconds
> => "true"
> {code}
> To make matters worse, the "balance_swich status" command will make the
> balancer disabled.
> Of course, the command was wrong but I think that's a little bit confusing.
> So I think we need to add parameter validations for commands in HBase shell.
> I'll check if we need to add validations for any other commands in this Jira.
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