[jira] [Created] (YARN-9012) NPE in scheduler UI when min-capacity is not configured

["tianjuan (JIRA)" <ji...@apache.org>]

tianjuan created YARN-9012:
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             Summary: NPE in scheduler UI when min-capacity is not configured
                 Key: YARN-9012
                 URL: https://issues.apache.org/jira/browse/YARN-9012
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 3.1.1
            Reporter: tianjuan
             Fix For: 3.1.1


I encountered the following while reviewing and testing branch YARN-5881.

The design document from YARN-5881 says that for max-capacity:
{quote} For any queue: If min-resource not set, it is automatically set to 0. (Same as today) 
{quote}
When I try leaving blank {{yarn.scheduler.capacity.< queue-path>.capacity}}, the RMUI scheduler page refuses to render. It looks like it's in {{CapacitySchedulerPage$ LeafQueueInfoBlock}}:
{noformat}
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
 at org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$LeafQueueInfoBlock.renderQueueCapacityInfo(CapacitySchedulerPage.java:163)
 at org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$LeafQueueInfoBlock.renderLeafQueueInfoWithPartition(CapacitySchedulerPage.java:108)
 at org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$LeafQueueInfoBlock.render(CapacitySchedulerPage.java:97)
 at org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
 at org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
 at org.apache.hadoop.yarn.webapp.View.render(View.java:243)
 at org.apache.hadoop.yarn.webapp.view.HtmlBlock$Block.subView(HtmlBlock.java:43)
 at org.apache.hadoop.yarn.webapp.hamlet2.HamletImpl$EImp._v(HamletImpl.java:117)
 at org.apache.hadoop.yarn.webapp.hamlet2.Hamlet$LI.__(Hamlet.java:7709)
 at org.apache.hadoop.yarn.server.resourcemanager.webapp.CapacitySchedulerPage$QueueBlock.render(CapacitySchedulerPage.java:342){noformat}



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