Pre-existing GL error 0x500

I'm trying to render a simple scene in a glWindow but I keep getting the following error in my output:

Info: GLDrawableHelper.reshape: pre-exisiting GL error 0x500

Tried looking it up but no luck. Any help with what this means?

Hi

I already answered to this question here:
http://forum.jogamp.org/Reg-Jogl-Display-callback-tp4030633p4030655.html

Why not using DebugGL or enabling all logs to see what is wrong?