You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Raphael Roth (JIRA)" <ji...@apache.org> on 2017/07/07 06:34:00 UTC
[jira] [Updated] (SPARK-20706) Spark-shell not overriding
method/variable definition
[ https://issues.apache.org/jira/browse/SPARK-20706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Raphael Roth updated SPARK-20706:
---------------------------------
Description:
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"
------------------------------
I'm using semicolon to force two statements to be compiled at the same time. It's also possible to reproduce the behavior using :paste
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.
EDIT:
The same behavior can be seen when declaring variables :
------------------------------
val a = 1
val b = a; val c = b;
println(b) // prints "1"
val a = 2 // override a
val b = a; val c = b;
println(b) // prints "1" instead of "2"
------------------------------
Interestingly, if the second-last line "val b = a; val c = b;" is executed twice, then I get the expected result
was:
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"
------------------------------
I'm using semicolon to force two statements to be compiled at the same time. It's also possible to reproduce the behavior using :paste
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.
Summary: Spark-shell not overriding method/variable definition (was: Spark-shell not overriding method definition)
> Spark-shell not overriding method/variable 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
> Priority: Minor
>
> 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"
> ------------------------------
> I'm using semicolon to force two statements to be compiled at the same time. It's also possible to reproduce the behavior using :paste
> 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.
> EDIT:
> The same behavior can be seen when declaring variables :
> ------------------------------
> val a = 1
> val b = a; val c = b;
> println(b) // prints "1"
> val a = 2 // override a
> val b = a; val c = b;
> println(b) // prints "1" instead of "2"
> ------------------------------
> Interestingly, if the second-last line "val b = a; val c = b;" is executed twice, then I get the expected result
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org