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https://issues.apache.org/jira/browse/MAPREDUCE-7459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ayush Saxena resolved MAPREDUCE-7459.
-------------------------------------
    Fix Version/s: 3.4.0
                       (was: 3.3.6)
     Hadoop Flags: Reviewed
       Resolution: Fixed

> Fixed TestHistoryViewerPrinter flakiness during string comparison 
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-7459
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7459
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 3.3.6
>         Environment: Java version: openjdk 11.0.20.1
> Maven version: Apache Maven 3.6.3
>            Reporter: Rajiv Ramachandran
>            Assignee: Rajiv Ramachandran
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.4.0
>
>
> The test 
> {{_org.apache.hadoop.mapreduce.jobhistory.TestHistoryViewerPrinter#testHumanPrinterAll_}}
> can fail due to flakiness. These flakiness occurs because the test utilizes 
> Hashmaps values and converts the values to string to perform the comparision 
> and the order of the objects returned may not be necessarily maintained. 
> The stack trace is as follows:
> testHumanPrinterAll(org.apache.hadoop.mapreduce.jobhistory.TestHistoryViewerPrinter)
>   Time elapsed: 0.297 s  <<< FAILURE!
> org.junit.ComparisonFailure:
> expected:<...8501754_0001_m_00000[7    6-Oct-2011 19:15:09    6-Oct-2011 
> 19:15:16 (7sec)
> SUCCEEDED MAP task list for job_1317928501754_0001
> TaskId        StartTime    FinishTime    Error    InputSplits
> ====================================================
> task_1317928501754_0001_m_000006    6-Oct-2011 19:15:08    6-Oct-2011 
> 19:15:14 (6sec)
> ...
> /tasklog?attemptid=attempt_1317928501754_0001_m_000003]_1
> REDUCE task list...> but was:<...8501754_0001_m_00000[5    6-Oct-2011 
> 19:15:07    6-Oct-2011 19:15:12 (5sec)
> SUCCEEDED MAP task list for job_1317928501754_0001
> TaskId        StartTime    FinishTime    Error    InputSplits
> ====================================================
> task_1317928501754_0001_m_000006    6-Oct-2011 19:15:08    6-Oct-2011 
> 19:15:14 (6sec)
> SUCCEEDED MAP task list for job_1317928501754_0001
> TaskId        StartTime    FinishTime    Error    InputSplits
> ====================================================
> task_1317928501754_0001_m_000004    6-Oct-2011 19:15:06    6-Oct-2011 
> 19:15:10 (4sec)
> SUCCEEDED MAP task list for job_1317928501754_0001
> TaskId        StartTime    FinishTime    Error    InputSplits
> ====================================================
> task_1317928501754_0001_m_000007    6-Oct-2011 19:15:09    6-Oct-2011 
> 19:15:16 (7sec)
> ...
> /tasklog?attemptid=attempt_1317928501754_0001_m_000006]_1



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