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https://issues.apache.org/jira/browse/SPARK-20706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16006078#comment-16006078
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Raphael Roth commented on SPARK-20706:
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Well I'm using Spark-Notebook, there it's very anoying because it's quite
common that cells are executed multiple times as you work on the code, and this
bug causes the implementations not to be updated. I just added the semicolons
to "simulate" the execution of a cell of code in Spark-Notebook. Is there
another way to do it?
> Spark-shell not overriding method definition
> --------------------------------------------
>
> Key: SPARK-20706
> URL: https://issues.apache.org/jira/browse/SPARK-20706
> Project: Spark
> Issue Type: Bug
> Components: Spark Shell
> Affects Versions: 2.0.0
> Environment: Linux, Scala 2.11.8
> Reporter: Raphael Roth
>
> In the following example, the definition of myMethod is not correctly updated:
> ------------------------------
> def myMethod() = "first definition"
> val tmp = myMethod(); val out = tmp
> println(out) // prints "first definition"
> def myMethod() = "second definition" // override above myMethod
> val tmp = myMethod(); val out = tmp
> println(out) // should be "second definition" but is "first definition"
> ------------------------------
> So if I-redefine myMethod, the implementation seems not to be updated in this
> case. I figured out that the second-last statement (val out = tmp) causes
> this behavior, if this is moved in a separate block, the code works just fine.
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