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https://issues.apache.org/jira/browse/YARN-8112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Weiwei Yang updated YARN-8112:
------------------------------
    Description: 
Currently following PC doesn't work 
{code:java}
-placement_spec zk=3,IN,NODE,zk
-placement_spec zk=1,IN,NODE,zk
{code}
Expectation: place 3/1 zk containers in any node of the cluster.

This is because when we do cardinality check, PC cannot be satisfied as there 
is no "zk" tag placed on any node. But this is a very common user-case, hence 
we need to support.

  was:
Currently following PC doesn't work

 
{code:java}
-placement_spec zk=3,IN,NODE,zk
-placement_spec zk=1,IN,NODE,zk
{code}
 

Expectation: place 3/1 zk containers in any node of the cluster.

This is because when we do cardinality check, PC cannot be satisfied as there 
is no "zk" tag placed on any node. But this is a very common user-case, hence 
we need to support.


> Relax cardinality check for intra-app affinity placement constraints
> --------------------------------------------------------------------
>
>                 Key: YARN-8112
>                 URL: https://issues.apache.org/jira/browse/YARN-8112
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Weiwei Yang
>            Priority: Major
>
> Currently following PC doesn't work 
> {code:java}
> -placement_spec zk=3,IN,NODE,zk
> -placement_spec zk=1,IN,NODE,zk
> {code}
> Expectation: place 3/1 zk containers in any node of the cluster.
> This is because when we do cardinality check, PC cannot be satisfied as there 
> is no "zk" tag placed on any node. But this is a very common user-case, hence 
> we need to support.



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