Julia Kinga Marton created YARN-9784:
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             Summary: TestLeafQueue is flaky
                 Key: YARN-9784
                 URL: https://issues.apache.org/jira/browse/YARN-9784
             Project: Hadoop YARN
          Issue Type: Bug
          Components: test
    Affects Versions: 3.3.0
            Reporter: Julia Kinga Marton
            Assignee: Julia Kinga Marton


There are some test cases in TestLeafQueue which are failing intermittently.

>From 100 runs, there were 16 failures. 

Some failure examples are the following ones:

{code:java}
2019-08-26 13:18:13 [ERROR] Errors: 
2019-08-26 13:18:13 [ERROR]   TestLeafQueue.setUp:144->setUpInternal:221 
WrongTypeOfReturnValue 
2019-08-26 13:18:13 YarnConfigu...
2019-08-26 13:18:13 [ERROR]   TestLeafQueue.setUp:144->setUpInternal:221 
WrongTypeOfReturnValue 
2019-08-26 13:18:13 YarnConfigu...
2019-08-26 13:18:13 [INFO] 
2019-08-26 13:18:13 [ERROR] Tests run: 36, Failures: 0, Errors: 2, Skipped: 0
{code}

{code:java}
2019-08-26 13:18:09 [ERROR] Failures: 
2019-08-26 13:18:09 [ERROR]   TestLeafQueue.testHeadroomWithMaxCap:1373 
expected:<2048> but was:<0>
2019-08-26 13:18:09 [INFO] 
2019-08-26 13:18:09 [ERROR] Tests run: 36, Failures: 1, Errors: 0, Skipped: 0
{code}
{code:java}
2019-08-26 13:18:18 [ERROR] Errors: 
2019-08-26 13:18:18 [ERROR]   TestLeafQueue.setUp:144->setUpInternal:221 
WrongTypeOfReturnValue 
2019-08-26 13:18:18 YarnConfigu...
2019-08-26 13:18:18 [ERROR]   TestLeafQueue.testHeadroomWithMaxCap:1307 ? 
ClassCast org.apache.hadoop.yarn.c...
2019-08-26 13:18:18 [INFO] 
2019-08-26 13:18:18 [ERROR] Tests run: 36, Failures: 0, Errors: 2, Skipped: 0
{code}
{code:java}
2019-08-26 13:18:10 [ERROR] Failures: 
2019-08-26 13:18:10 [ERROR]   TestLeafQueue.testDRFUserLimits:847 Verify user_0 
got resources 
2019-08-26 13:18:10 [INFO] 
2019-08-26 13:18:10 [ERROR] Tests run: 36, Failures: 1, Errors: 0, Skipped: 0
{code}



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