can't build jdk15 on 6.0

[Owen Jeremiah]

Whenever I encountered error building from ports, I always go to the extreme
route:
mv /usr/ports/distfiles /somewhere
rmdir /usr/ports
cd /usr
tar xvfz ports.tar.gz
mv /somewhere /usr/ports/distfiles

After that usually all ports will install without any error showing up
before. I did this because my company's network didn't allow my (personal)
notebook to access anything outside my intranet. If it's not the case for
you, maybe you should portupgrade your port-tree first.

--
Yours sincerely,
Owen Jeremiah