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https://issues.apache.org/jira/browse/HADOOP-18633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17689116#comment-17689116
 ] 

ASF GitHub Bot commented on HADOOP-18633:
-----------------------------------------

hadoop-yetus commented on PR #5401:
URL: https://github.com/apache/hadoop/pull/5401#issuecomment-1431352602

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   |  |   | 119m 11s |  |  |
   
   
   | Subsystem | Report/Notes |
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   | Docker | ClientAPI=1.42 ServerAPI=1.42 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5401/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/5401 |
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   | modules | C: hadoop-tools/hadoop-distcp U: hadoop-tools/hadoop-distcp |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> fix test AbstractContractDistCpTest#testDistCpUpdateCheckFileSkip 
> ------------------------------------------------------------------
>
>                 Key: HADOOP-18633
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18633
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: tools/distcp
>            Reporter: Mehakmeet Singh
>            Assignee: Mehakmeet Singh
>            Priority: Major
>              Labels: pull-request-available
>
> In the newly introduced test testDistCpUpdateCheckFileSkip, for the first 
> pass of "distcp -update", target file should not be present so that the copy 
> takes place and creates the target file. 
> Currently, we create both the source and target file with same block size 
> from the start which can lead to flakiness due to race condition causing the 
> modification time of the target file to be greater than/equal to the source 
> and not copy the file at all. This can be seen more in the 
> TestLocalContractDistCp due to no remote calls to create the target.
> {code:java}
> java.lang.AssertionError: Mismatch in COPY counter value expected:<1> but 
> was:<0>
>       at org.junit.Assert.fail(Assert.java:89)
>       at org.junit.Assert.failNotEquals(Assert.java:835)
>       at org.junit.Assert.assertEquals(Assert.java:647)
>       at 
> org.apache.hadoop.tools.contract.AbstractContractDistCpTest.verifySkipAndCopyCounter(AbstractContractDistCpTest.java:1000)
>       at 
> org.apache.hadoop.tools.contract.AbstractContractDistCpTest.testDistCpUpdateCheckFileSkip(AbstractContractDistCpTest.java:919)
>  {code}



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