Jason Fehr created IMPALA-15612:
-----------------------------------
Summary: Admission Control More Specific Rule Not Overriding in
ROOT Pool
Key: IMPALA-15612
URL: https://issues.apache.org/jira/browse/IMPALA-15612
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 5.1.0
Reporter: Jason Fehr
The doc:
https://impala.apache.org/docs/build/html/topics/impala_admission_config.html
we see:
More Specific Rules Override The Less Specific
Steps to Repro:
1) Add quotas to fair-scheduler.xml where wildcard limit is larger than
specific user limit
eg:
{noformat}
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<allocations>
<queue name="root">
<weight>1.0</weight>
<schedulingPolicy>fair</schedulingPolicy>
<aclSubmitApps>*</aclSubmitApps>
<aclAdministerApps>*</aclAdministerApps>
<userQueryLimit>
<user></user>{*}
<totalCount>3</totalCount>
</userQueryLimit>
<userQueryLimit>
<user>userA</user>
<totalCount>2</totalCount>
</userQueryLimit>
<queue name="default">
<weight>1.0</weight>
<schedulingPolicy>fair</schedulingPolicy>
<!-- Set a huge amount of memory to enable memory based admission
control -->
<maxResources>50000000 mb, 0 vcores</maxResources>
</queue>
</queue>
<defaultQueueSchedulingPolicy>fair</defaultQueueSchedulingPolicy>
<queuePlacementPolicy>
<!-- rule cannot create new queue -->
<rule name="specified" create="false"/>
<rule name="default"/>
</queuePlacementPolicy>
</allocations>
{noformat}
2) When running as "userA",launch more than the small limit:
eg:
{noformat}
impala-shell -q "select * from functional.alltypes;"
impala-shell -q "select * from functional.alltypes;"
impala-shell -q "select * from functional.alltypes;"
{noformat}
3) Note that all 3 are OK and running (expected 3rd to fail due to exceed limit
of two)
4) Try one more, and then we see:
Rejected query from pool root.default: current per-user load 3 for user 'userA'
is at or above the user limit 2 in pool 'root'
The message says current is 3, which it never should be, but interestingly it
shows the user limit as 2 which is the correct, more specific limit
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