Errors running builder 'Android Resource Manager' on ADT

Question

I am facing a problem when I try to create new android project in eclipse adt plugin tools.

ERROR/EXCEPTION::

Errors occurred during the build. Errors

Answer 1

If you close eclipse and then look in your system processes and still see adb running, then that's the problem - it crashed. In my case it was because I have extension files for other programs in my JRE that the adb doesn't seem to like. Remove all your ext files, force shut down your adb.exe and then restart eclipse.

Root exception:

java.lang.NoClassDefFoundError: org/apache/log4j/Priority