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https://issues.apache.org/jira/browse/HBASE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16740709#comment-16740709
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Josh Elser commented on HBASE-21225:
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{quote}the reason I was trying to remove the "remove" attribute was, I saw that
throttle quota's implementation didn't seem to have a "remove" attribute and
wanted to keep both the implementations as similar as possible
{quote}
IMO, the implementation of the ThrottleQuota is strange. It's really
complicated for no apparent reason to me :). It's not a gold-standard to hold
other code to for me.
> Having RPC & Space quota on a table/Namespace doesn't allow space quota to be
> removed using 'NONE'
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-21225
> URL: https://issues.apache.org/jira/browse/HBASE-21225
> Project: HBase
> Issue Type: Bug
> Reporter: Sakthi
> Assignee: Sakthi
> Priority: Major
> Attachments: hbase-21225.master.001.patch,
> hbase-21225.master.002.patch, hbase-21225.master.003.patch,
> hbase-21225.master.004.patch
>
>
> A part of HBASE-20705 is still unresolved. In that Jira it was assumed that
> problem is: when table having both rpc & space quotas is dropped (with
> hbase.quota.remove.on.table.delete set as true), the rpc quota is not set to
> be dropped along with table-drops, and space quota was not being able to be
> removed completely because of the "EMPTY" row that rpc quota left even after
> removing.
> The proposed solution for that was to make sure that rpc quota didn't leave
> empty rows after removal of quota. And setting automatic removal of rpc quota
> with table drops. That made sure that space quotas can be recreated/removed.
> But all this was under the assumption that hbase.quota.remove.on.table.delete
> is set as true. When it is set as false, the same issue can reproduced. Also
> the below shown steps can used to reproduce the issue without table-drops.
> {noformat}
> hbase(main):005:0> create 't2','cf'
> Created table t2
> Took 0.7619 seconds
> => Hbase::Table - t2
> hbase(main):006:0> set_quota TYPE => THROTTLE, TABLE => 't2', LIMIT =>
> '10M/sec'
> Took 0.0514 seconds
> hbase(main):007:0> set_quota TYPE => SPACE, TABLE => 't2', LIMIT => '1G',
> POLICY => NO_WRITES
> Took 0.0162 seconds
> hbase(main):008:0> list_quotas
> OWNER QUOTAS
> TABLE => t2 TYPE => THROTTLE, THROTTLE_TYPE => REQUEST_SIZE,
> LIMIT => 10M/sec, SCOPE =>
> MACHINE
> TABLE => t2 TYPE => SPACE, TABLE => t2, LIMIT => 1073741824,
> VIOLATION_POLICY => NO_WRIT
> ES
> 2 row(s)
> Took 0.0716 seconds
> hbase(main):009:0> set_quota TYPE => SPACE, TABLE => 't2', LIMIT => NONE
> Took 0.0082 seconds
> hbase(main):010:0> list_quotas
> OWNER QUOTAS
> TABLE => t2 TYPE => THROTTLE, THROTTLE_TYPE =>
> REQUEST_SIZE, LIMIT => 10M/sec, SCOPE => MACHINE
> TABLE => t2 TYPE => SPACE, TABLE => t2, REMOVE => true
> 2 row(s)
> Took 0.0254 seconds
> hbase(main):011:0> set_quota TYPE => SPACE, TABLE => 't2', LIMIT => '1G',
> POLICY => NO_WRITES
> Took 0.0082 seconds
> hbase(main):012:0> list_quotas
> OWNER QUOTAS
> TABLE => t2 TYPE => THROTTLE, THROTTLE_TYPE =>
> REQUEST_SIZE, LIMIT => 10M/sec, SCOPE => MACHINE
> TABLE => t2 TYPE => SPACE, TABLE => t2, REMOVE => true
> 2 row(s)
> Took 0.0411 seconds
> {noformat}
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