[jira] [Created] (HADOOP-16503) [JDK11] TestLeafQueue tests are failing due to WrongTypeOfReturnValue

["Adam Antal (JIRA)" <ji...@apache.org>]

Adam Antal created HADOOP-16503:
-----------------------------------

             Summary: [JDK11] TestLeafQueue tests are failing due to WrongTypeOfReturnValue
                 Key: HADOOP-16503
                 URL: https://issues.apache.org/jira/browse/HADOOP-16503
             Project: Hadoop Common
          Issue Type: Sub-task
    Affects Versions: 3.2.0
            Reporter: Adam Antal
            Assignee: Adam Antal


Many of the tests in {{org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue}} fails with the following error message running on JDK11:

{noformat}
[ERROR] testSingleQueueWithOneUser(org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue)  Time elapsed: 0.204 s  <<< ERROR!
org.mockito.exceptions.misusing.WrongTypeOfReturnValue:

YarnConfiguration cannot be returned by getRMNodes()
getRMNodes() should return ConcurrentMap
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
   Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies -
   - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.

	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue.setUpInternal(TestLeafQueue.java:221)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue.setUp(TestLeafQueue.java:144)
       ...
{noformat}

This is due to the actual execution of the call, while we need to record only the invocation of it. According to the javadocs and other folks.



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