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https://issues.apache.org/jira/browse/HADOOP-17513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17281836#comment-17281836
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Ahmed Hussein commented on HADOOP-17513:
----------------------------------------

[~aajisaka], by the way, I noticed that running the build automatically replace 
guava imports with the third party import.

This is probably the reason why the wrong import has not been detected before 
merging in  YARN-10352  . 

I suggest that automatic import replacement gets removed from the build so that 
patches do not get changes without the developers' knowledge.

Personally, I will prefer that the build breaks locally rather than injecting 
automatic code changes.

CC: [~Jim_Brennan] was also confused when he had his patch modified during the 
build.

Let me know WDYT?

> Checkstyle IllegalImport does not catch guava imports
> -----------------------------------------------------
>
>                 Key: HADOOP-17513
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17513
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> Although YARN-10352 introduces {{guava iterator import}}, it was committed to 
> trunk without checkstyle errors.
> According to [IllegalImportCheck#setIllegalPkgs 
> |https://github.com/checkstyle/checkstyle/blob/master/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/IllegalImportCheck.java],
>  the packages regex should be the prefix of the package. The code 
> automatically append {{\.*}} to the regex.
> CC: [~aajisaka]
>  



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