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https://issues.apache.org/jira/browse/HBASE-13987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605587#comment-14605587
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Matteo Bertozzi commented on HBASE-13987:
-----------------------------------------

that isQuotaEnabled() checking the configuration is not what you want.
on the client conf you set hbase.quota.enabled = true, but on the server side 
you have hbase.quota.enabled = false you still end up with TableNotFound.

set_quota ask the server if the conf is enabled or not, in this patch you ask 
the client which is not correct. 
if you want to add a check just check for TableNotFound.

> Modify the result of shell cmd list_quotas when not enable quota
> ----------------------------------------------------------------
>
>                 Key: HBASE-13987
>                 URL: https://issues.apache.org/jira/browse/HBASE-13987
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Guanghao Zhang
>            Assignee: Guanghao Zhang
>            Priority: Minor
>         Attachments: HBASE-13987.patch
>
>
> When not enable quota, use shell cmd list_quotas will get result as belows:
> hbase(main):008:0> list_quotas
> OWNER                                                QUOTAS                   
>                                                                               
>                                                  
> ERROR: Unknown table hbase:quota!
> It is confuse if user doesn't know quotas are stored in hbase:quota. I add 
> check isQuotaEnabled before scan the table hbase:quota. So it will return 
> result  "ERROR: quota support disabled", which is same with set_quota.



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