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https://issues.apache.org/jira/browse/YARN-7769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17339139#comment-17339139
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Benjamin Teke edited comment on YARN-7769 at 5/4/21, 4:50 PM:
--------------------------------------------------------------

[~wilfreds], [~snemeth] what do we expect from YARN-8951? Running the UT didn't 
give a NPE, however the unmodified test case caused FS init failure with:

{code:java}
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationConfigurationException:
 Could get past last queue placement rule without assigning
{code}

This is expected, as the rule without create flag is not terminal. But the NPE 
didn't occur.



was (Author: bteke):
[~wilfreds], [~snemeth] what do we expect from YARN-8951? Running the UT didn't 
give a NPE, however the unmodified test case caused FS init failure with:

{code:java}
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationConfigurationException:
 Could get past last queue placement rule without assigning
{code}


> FS QueueManager should not create default queue at init
> -------------------------------------------------------
>
>                 Key: YARN-7769
>                 URL: https://issues.apache.org/jira/browse/YARN-7769
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 3.1.0
>            Reporter: Wilfred Spiegelenburg
>            Assignee: Benjamin Teke
>            Priority: Major
>         Attachments: YARN-7769.001.patch, YARN-7769.002.patch, 
> YARN-7769.003.patch
>
>
> Currently the FairScheduler QueueManager automatically creates the default 
> queue. However the default queue does not need to exist. We have two possible 
> cases which we should handle:
> * Based on the placement rule "Default" the name for the default queue might 
> not be default and it should be created with a different name
> * There might not be a "Default" placement rule at all which removes the need 
> to create the queue.
> We should leave the creation of the default queue to the point in time that 
> we can assess if it is needed or not.



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