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https://issues.apache.org/jira/browse/HBASE-20885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560095#comment-16560095
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Sakthi commented on HBASE-20885:
--------------------------------
[~elserj], FYI. I am yet to figure out why this happens but in the course of
that, I saw few issues (HBASE-20813 & HBASE-20885) and decided to work upon
these first. But, Once these 2 issues are solved, HBASE-20705(which is the
parent issue) resolves. i.e. making sure that removal of table/namespace
removes the RPC quotas as well & removal of the empty row after removal of an
rpc quota automatically seemed to resolve HBASE-20705. I tested that myself.
{noformat}
hbase(main):001:0> create 't2','cf1'
Created table t2
Took 1.0745 seconds
=> Hbase::Table - t2
hbase(main):002:0> set_quota TYPE => THROTTLE, TABLE => 't2', LIMIT => '10M/sec'
Took 0.0328 seconds
hbase(main):003:0> list_quotas
OWNER QUOTAS
TABLE => t2 TYPE => THROTTLE, THROTTLE_TYPE
=> REQUEST_SIZE, LIMIT => 10M/sec, SCOPE => MACHINE
1 row(s)
Took 0.1078 seconds
hbase(main):004:0> scan 'hbase:quota'
ROW COLUMN+CELL
t.t2 column=q:s,
timestamp=1532714834471, value=PBUF\x12\x0B\x12\x09\x08\x04\x10\x80\x80\x80\x05
\x02
1 row(s)
Took 0.0301 seconds
hbase(main):005:0> set_quota TYPE => THROTTLE, TABLE => 't2', LIMIT => 'NONE'
Took 0.0066 seconds
hbase(main):006:0> list_quotas
OWNER QUOTAS
0 row(s)
Took 0.0248 seconds
hbase(main):007:0> scan 'hbase:quota'
ROW COLUMN+CELL
t.t2 column=q:s,
timestamp=1532714855300, value=PBUF\x12\x00
1 row(s)
Took 0.0034 seconds
hbase(main):008:0> set_quota TYPE => SPACE, TABLE => 't2', LIMIT => '1G',
POLICY => NO_WRITES
Took 0.0145 seconds
hbase(main):009:0> list_quotas
OWNER QUOTAS
TABLE => t2 TYPE => SPACE, TABLE => t2,
LIMIT => 1073741824, VIOLATION_POLICY => NO_WRITES
1 row(s)
Took 0.0340 seconds
hbase(main):010:0> scan 'hbase:quota'
ROW COLUMN+CELL
t.t2 column=q:s,
timestamp=1532714870451,
value=PBUF\x12\x00\x1A\x08\x08\x80\x80\x80\x80\x04\x10\x03
1 row(s)
Took 0.0045 seconds
hbase(main):011:0> set_quota TYPE => SPACE, TABLE => 't2', LIMIT => 'NONE',
POLICY => NO_WRITES
Took 0.0075 seconds
hbase(main):012:0> list_quotas
OWNER QUOTAS
TABLE => t2 TYPE => SPACE, TABLE => t2,
REMOVE => true
1 row(s)
Took 0.0353 seconds
hbase(main):013:0> scan 'hbase:quota'
ROW COLUMN+CELL
t.t2 column=q:s,
timestamp=1532714887189, value=PBUF\x12\x00\x1A\x02\x18\x01
1 row(s)
{noformat}
> Remove entry for RPC quota from hbase:quota when RPC quota is removed.
> ----------------------------------------------------------------------
>
> Key: HBASE-20885
> URL: https://issues.apache.org/jira/browse/HBASE-20885
> Project: HBase
> Issue Type: Sub-task
> Reporter: Sakthi
> Assignee: Sakthi
> Priority: Minor
> Attachments: hbase-20885.master.001.patch,
> hbase-20885.master.002.patch, hbase-20885.master.003.patch
>
>
> When a RPC quota is removed (using LIMIT => 'NONE'), the entry from
> hbase:quota table is not completely removed. For e.g. see below:
> {noformat}
> hbase(main):005:0> create 't2','cf1'
> Created table t2
> Took 0.8000 seconds
> => Hbase::Table - t2
> hbase(main):006:0> set_quota TYPE => THROTTLE, TABLE => 't2', LIMIT =>
> '10M/sec'
> Took 0.1024 seconds
> hbase(main):007:0> list_quotas
> OWNER QUOTAS
> TABLE => t2 TYPE => THROTTLE, THROTTLE_TYPE =>
> REQUEST_SIZE, LIMIT => 10M/sec, SCOPE => MACHINE
> 1 row(s)
> Took 0.0622 seconds
> hbase(main):008:0> scan 'hbase:quota'
> ROW COLUMN+CELL
> t.t2 column=q:s, timestamp=1531513014463,
> value=PBUF\x12\x0B\x12\x09\x08\x04\x10\x80\x80\x80
> \x05 \x02
> 1 row(s)
> Took 0.0453 seconds
> hbase(main):009:0> set_quota TYPE => THROTTLE, TABLE => 't2', LIMIT => 'NONE'
> Took 0.0097 seconds
> hbase(main):010:0> list_quotas
> OWNER QUOTAS
> 0 row(s)
> Took 0.0338 seconds
> hbase(main):011:0> scan 'hbase:quota'
> ROW COLUMN+CELL
> t.t2 column=q:s, timestamp=1531513039505,
> value=PBUF\x12\x00
> 1 row(s)
> Took 0.0066 seconds
> {noformat}
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