[jira] [Created] (YARN-8350) NPE in service AM related to placement policy

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

Billie Rinaldi created YARN-8350:
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             Summary: NPE in service AM related to placement policy
                 Key: YARN-8350
                 URL: https://issues.apache.org/jira/browse/YARN-8350
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Billie Rinaldi
            Assignee: Gour Saha


It seems like this NPE is happening in a service with more than one component when one component has a placement policy and the other does not. It causes the AM to crash. See https://github.com/hortonworks/hadoop/blob/3c66d40e26bc2d0e17a6e1869201021a8c2f6df1/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java
{noformat}
java.lang.NullPointerException
        at org.apache.hadoop.yarn.service.component.Component.requestContainers(Component.java:644)
        at org.apache.hadoop.yarn.service.component.Component$FlexComponentTransition.transition(Component.java:310)
        at org.apache.hadoop.yarn.service.component.Component$FlexComponentTransition.transition(Component.java:293)
        at org.apache.hadoop.yarn.state.StateMachineFactory$MultipleInternalArc.doTransition(StateMachineFactory.java:385)
        at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at org.apache.hadoop.yarn.state.StateMachineFactory.access$500(StateMachineFactory.java:46)
        at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:487)
        at org.apache.hadoop.yarn.service.component.Component.handle(Component.java:919)
        at org.apache.hadoop.yarn.service.ServiceScheduler.serviceStart(ServiceScheduler.java:344)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
        at org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:121)
        at org.apache.hadoop.yarn.service.ServiceMaster.lambda$serviceStart$0(ServiceMaster.java:253)
        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:1682)
        at org.apache.hadoop.yarn.service.ServiceMaster.serviceStart(ServiceMaster.java:251)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
        at org.apache.hadoop.yarn.service.ServiceMaster.main(ServiceMaster.java:317)
{noformat}



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