[jira] [Resolved] (SPARK-19417) spark.files.overwrite is ignored

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-19417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-19417.
-------------------------------
    Resolution: Won't Fix

I think this behavior is on purpose, as these resources are effectively immutable. Letting them change might cause other odd behavior. You can find other ways to broadcast mutable state.

> spark.files.overwrite is ignored
> --------------------------------
>
>                 Key: SPARK-19417
>                 URL: https://issues.apache.org/jira/browse/SPARK-19417
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.1.0
>            Reporter: Chris Kanich
>
> I have not been able to get Spark to actually overwrite a file after I have changed it on the driver node, re-called addFile, and then used it on the executors again. Here's a failing test.
> {code}
>   test("can overwrite files when spark.files.overwrite is true") {
>     val dir = Utils.createTempDir()
>     val file = new File(dir, "file")
>     try {
>       Files.write("one", file, StandardCharsets.UTF_8)
>       sc = new SparkContext(new SparkConf().setAppName("test").setMaster("local-cluster[1,1,1024]")
>          .set("spark.files.overwrite", "true"))
>       sc.addFile(file.getAbsolutePath)
>       def getAddedFileContents(): String = {
>         sc.parallelize(Seq(0)).map { _ =>
>           scala.io.Source.fromFile(SparkFiles.get("file")).mkString
>         }.first()
>       }
>       assert(getAddedFileContents() === "one")
>       Files.write("two", file, StandardCharsets.UTF_8)
>       sc.addFile(file.getAbsolutePath)
>       assert(getAddedFileContents() === "onetwo")
>     } finally {
>       Utils.deleteRecursively(dir)
>       sc.stop()
>     }
>   }
> {code}



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