Chandni Singh created YARN-7371:
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Summary: NPE in ServiceMaster after RM is restarted and then the
ServiceMaster is killed
Key: YARN-7371
URL: https://issues.apache.org/jira/browse/YARN-7371
Project: Hadoop YARN
Issue Type: Sub-task
Reporter: Chandni Singh
java.lang.NullPointerException
at
org.apache.hadoop.yarn.service.ServiceScheduler.recoverComponents(ServiceScheduler.java:313)
at
org.apache.hadoop.yarn.service.ServiceScheduler.serviceStart(ServiceScheduler.java:265)
at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
at
org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:121)
at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
at org.apache.hadoop.yarn.service.ServiceMaster.main(ServiceMaster.java:150)
Steps:
1. Stopped RM and then started it
2. Application was still running
3. Killed the ServiceMaster to check if it recovers
4. Next attempt failed with the above exception
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