Github user manku-timma commented on the pull request:
https://github.com/apache/spark/pull/322#issuecomment-39689262
@pwendell: You are right. Actually
`sun.misc.Launcher$AppClassLoader@12360be0` is the classloader even in the
earlier code.
Looks like classes directly loaded by SparkEnv get to use the right
classloader since it is passed as an argument. But classes loaded at the second
level (like in BroadcastManager above) still use the null classloader and fail.
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