Toshihiro Suzuki created HBASE-21152:
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Summary: 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: shell
Reporter: Toshihiro Suzuki
Assignee: Toshihiro Suzuki
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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