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  1. Hadoop YARN
  2. YARN-5734 OrgQueue for easy CapacityScheduler queue configuration management
  3. YARN-10287

Update scheduler-conf corrupts the CS configuration when removing queue which is referred in queue mapping

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      Update scheduler-conf corrupts the CS configuration when removing queue which is referred in queue mapping. The deletion is failed with below error message but the queue got removed from CS configuration and job submission failed and not removed from the backend ZKConfigurationStore. On subsequent modify using scheduler-conf, the queue appears again from ZKConfigurationStore

      2020-05-22 12:38:38,252 ERROR org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices: Exception thrown when modifying configuration.
      java.io.IOException: Failed to re-init queues : mapping contains invalid or non-leaf queue Prod
      	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitialize(CapacityScheduler.java:478)
      	at org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshQueues(AdminService.java:430)
      	at org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices$13.run(RMWebServices.java:2389)
      	at org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices$13.run(RMWebServices.java:2377)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at javax.security.auth.Subject.doAs(Subject.java:422)
      	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
      	at org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.updateSchedulerConfiguration(RMWebServices.java:2377)
      

      Repro:

      1. Setup Queue Mapping
      
      yarn.scheduler.capacity.root.queues=default,dummy
      yarn.scheduler.capacity.queue-mappings=g:hadoop:dummy
      
      2. Stop the root.dummy queue
      
      <update-queue>
             <queue-name>root.dummy</queue-name>
             <params>
               <entry>
                 <key>state</key>
                 <value>STOPPED</value>
               </entry>
             </params>
           </update-queue>
      	 
      	 
      3. Delete the root.dummy queue
      
      curl --negotiate -u : -X PUT -d @abc.xml -H "Content-type: application/xml" 'http://<RM_IP>:8088/ws/v1/cluster/scheduler-conf?user.name=yarn'
      
      <sched-conf>
            <update-queue>
                <queue-name>root.default</queue-name>
                <params>
                  <entry>
                    <key>capacity</key>
                    <value>100</value>
                  </entry>
                </params>
              </update-queue>
      
              <remove-queue>root.dummy</remove-queue>
            </sched-conf>  
      

      Attachments

        1. YARN-10287-001.patch
          10 kB
          Prabhu Joseph

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            groot Ashutosh Gupta
            akhilpb Akhil PB
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