Ahmed Hussein created YARN-9857:
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Summary: TestDelegationTokenRenewer throws NPE but tests pass
Key: YARN-9857
URL: https://issues.apache.org/jira/browse/YARN-9857
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Ahmed Hussein
Assignee: Ahmed Hussein
{{TestDelegationTokenRenewer}} throws some NPEs:
{code:bash}
2019-09-25 12:51:23,446 WARN [pool-19-thread-2]
security.DelegationTokenRenewer
(DelegationTokenRenewer.java:handleDTRenewerAppSubmitEvent(945)) - Unable to
add the application to the delegation token renewer.
java.lang.NullPointerException
at
org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.handleDTRenewerAppSubmitEvent(DelegationTokenRenewer.java:942)
at
org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.run(DelegationTokenRenewer.java:918)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2019-09-25 12:51:23,446 DEBUG [main] util.MBeans (MBeans.java:unregister(138))
- Unregistering Hadoop:service=ResourceManager,name=CapacitySchedulerMetrics
Exception in thread "pool-19-thread-2" java.lang.NullPointerException
at
org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.handleDTRenewerAppSubmitEvent(DelegationTokenRenewer.java:951)
at
org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.run(DelegationTokenRenewer.java:918)
2019-09-25 12:51:23,447 DEBUG [main] util.MBeans (MBeans.java:unregister(138))
- Unregistering Hadoop:service=ResourceManager,name=MetricsSystem,sub=Stats
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2019-09-25 12:51:23,447 INFO [main] impl.MetricsSystemImpl
(MetricsSystemImpl.java:stop(216)) - ResourceManager metrics system stopped.
{code}
the RMContext dispatcher is not set for the RMMock which results in NPE
accessing the event handler of the dispatcher inside {{DelegationTokenRenewer}}.
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