Re: Unable to set ContextClassLoader in spark shell

[Marcelo Vanzin]

On Mon, Jun 6, 2016 at 4:22 AM, shengzhixia  wrote:
> In my previous Java project I can change class loader without problem. Could
> I know why the above method couldn't change class loader in spark shell?
> Any way I can achieve it?

The spark-shell for Scala 2.10 will reset the context class loader
every time you run a statement. Not sure if the 2.11 behavior is the
same (don't see the code in Spark, but it might be in the Scala repl
code).

I'm not sure there is any way to work around it.

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Marcelo

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Unable to set ContextClassLoader in spark shell

[shengzhixia]

Hello guys!

I am using spark shell which uses TranslatingClassLoader.

scala> Thread.currentThread().getContextClassLoader
res13: ClassLoader =
org.apache.spark.repl.SparkIMain$TranslatingClassLoader@23c767e6


For some reason I want to use another class loader, but when I do

val myclassloader = // create my own classloader
Thread.currentThread.setContextClassLoader(myclassloader)

The setContextClassLoader doesn't seem to work. I still get a
TranslatingClassLoader:

scala> Thread.currentThread().getContextClassLoader
res13: ClassLoader =
org.apache.spark.repl.SparkIMain$TranslatingClassLoader@23c767e6


In my previous Java project I can change class loader without problem. Could
I know why the above method couldn't change class loader in spark shell? 
Any way I can achieve it?

Thanks!




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