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From "Wilfred Spiegelenburg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7689) TestRMContainerAllocator fails after YARN-6124
Date Fri, 29 Dec 2017 03:04:00 GMT
Wilfred Spiegelenburg created YARN-7689:
-------------------------------------------

             Summary: TestRMContainerAllocator fails after YARN-6124
                 Key: YARN-7689
                 URL: https://issues.apache.org/jira/browse/YARN-7689
             Project: Hadoop YARN
          Issue Type: Bug
          Components: scheduler
    Affects Versions: 3.1.0
            Reporter: Wilfred Spiegelenburg
            Assignee: Wilfred Spiegelenburg


After the change that was made for YARN-6124 multiple tests in the TestRMContainerAllocator
from MapReduce fail with the following NPE:
{code}
java.lang.NullPointerException
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler.reinitialize(AbstractYarnScheduler.java:1437)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.reinitialize(FifoScheduler.java:320)
	at org.apache.hadoop.mapreduce.v2.app.rm.TestRMContainerAllocator$ExcessReduceContainerAllocateScheduler.<init>(TestRMContainerAllocator.java:1808)
	at org.apache.hadoop.mapreduce.v2.app.rm.TestRMContainerAllocator$MyResourceManager2.createScheduler(TestRMContainerAllocator.java:970)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceInit(ResourceManager.java:659)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.createAndInitActiveServices(ResourceManager.java:1133)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:316)
	at org.apache.hadoop.yarn.server.resourcemanager.MockRM.serviceInit(MockRM.java:1334)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
	at org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:162)
	at org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:141)
	at org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:137)
	at org.apache.hadoop.mapreduce.v2.app.rm.TestRMContainerAllocator$MyResourceManager.<init>(TestRMContainerAllocator.java:928)
{code}

In the test we just call reinitiaize on a scheduler and never call init.
The stop of the service is guarded and so should the start and the re-init.




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