Tasks and classloader

[Julien R.]

Hi,

I’m facing a classpath issue when I try to run a task in my project. My task calls some code that reflectively creates an instance of a class. If I manually create the instance, everything works fine, but when I call this code that uses reflection it fails with a ClassNotFoundException error. My problem is very similar to this one, that was posted more than three years ago:

https://github.com/codahale/jerkson/issues/38

I was able to resolve my problem by manually setting the classloader using Thread.currentThread.setContextClassLoader, but I’m wondering what should be the recommended way to deal with this situation?

Best,

Julien

[Joshua Suereth]

Unfortunately, this is a common problem with classloaders/reflection in Java.   sbt core tasks which load user code (like run, test) will set teh thread context classloader for you.  For now, manually setting in your task is something you have to do.  Just make sure to restore the original context classloader (or null) when you're done.

 

Best,

Julien

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