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https://issues.apache.org/jira/browse/YARN-6072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15811359#comment-15811359
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Rohith Sharma K S commented on YARN-6072:
-----------------------------------------

I do not see any major impact flipping ElectorService and AdminService. I am +1 
for flipping the service.

> RM unable to start in secure mode
> ---------------------------------
>
>                 Key: YARN-6072
>                 URL: https://issues.apache.org/jira/browse/YARN-6072
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.8.0, 3.0.0-alpha2
>            Reporter: Bibin A Chundatt
>            Assignee: Ajith S
>            Priority: Blocker
>         Attachments: hadoop-secureuser-resourcemanager-vm1.log
>
>
> Resource manager is unable to start in secure mode
> {code}
> 2017-01-08 14:27:29,917 INFO org.apache.hadoop.conf.Configuration: found 
> resource hadoop-policy.xml at 
> file:/opt/hadoop/release/hadoop-3.0.0-alpha2-SNAPSHOT/etc/hadoop/hadoop-policy.xml
> 2017-01-08 14:27:29,918 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService: Refresh All
> java.lang.NullPointerException
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshServiceAcls(AdminService.java:569)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshServiceAcls(AdminService.java:552)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:707)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:302)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:142)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:888)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:467)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
> 2017-01-08 14:27:29,919 ERROR 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService: RefreshAll failed 
> so firing fatal event
> org.apache.hadoop.ha.ServiceFailedException
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:712)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:302)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:142)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:888)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:467)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
> 2017-01-08 14:27:29,920 INFO org.apache.hadoop.ipc.Server: Starting Socket 
> Reader #1 for port 8033
> 2017-01-08 14:27:29,948 WARN org.apache.hadoop.ha.ActiveStandbyElector: 
> Exception handling the winning of election
> org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:144)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:888)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:467)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
> Caused by: org.apache.hadoop.ha.ServiceFailedException: Error on refreshAll 
> during transition to Active
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:311)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:142)
>         ... 4 more
> Caused by: org.apache.hadoop.ha.ServiceFailedException
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:712)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:302)
>         ... 5 more
> {code}
> ResourceManager services are added in following order
> # EmbeddedElector
> # AdminService
> During resource manager service start() .EmbeddedElector starts first and 
> invokes  {{AdminService#refreshAll()}} but {{AdminService#serviceStart()}} 
> happens after {{ActiveStandbyElectorBasedElectorService}} service start is 
> complete. So {{AdminService#server}} will be *null* which causes  
> {{AdminService#refreshAll()}}  to fail
> {code}
>       if (getConfig().getBoolean(
>           CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHORIZATION,
>           false)) {
>         refreshServiceAcls();
>       }
> {code}



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