[jira] [Commented] (FLINK-10359) Scala example in DataSet docs is broken

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-10359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16714230#comment-16714230 ] 

ASF GitHub Bot commented on FLINK-10359:
----------------------------------------

yanghua opened a new pull request #7266: [FLINK-10359] Scala example in DataSet docs is broken
URL: https://github.com/apache/flink/pull/7266
 
 
   ## What is the purpose of the change
   
   *This pull request fixed scala example in DataSet docs is broken*
   
   
   ## Brief change log
   
     - *Fix Scala example in DataSet docs is broken*
   
   
   ## Verifying this change
   
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs / **not documented**)
   

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> Scala example in DataSet docs is broken
> ---------------------------------------
>
>                 Key: FLINK-10359
>                 URL: https://issues.apache.org/jira/browse/FLINK-10359
>             Project: Flink
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions: 1.5.3, 1.6.0, 1.7.0
>            Reporter: Fabian Hueske
>            Assignee: vinoyang
>            Priority: Major
>              Labels: pull-request-available
>
> The Scala example of [https://ci.apache.org/projects/flink/flink-docs-release-1.6/dev/batch/dataset_transformations.html#combinable-groupreducefunctions] is broken.
> The {{asScala}} and the {{reduce}} call fetch the Java {{Iterator}} which may only fetched once.
> {quote}The Iterable can be iterated over only once. Only the first call to 'iterator()' will succeed.{quote}
> While we are on it, it would make sense to check the other examples as well.



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