Chandal dosh is the combination of Jupiter and rahu or ketu in the natal chart. Chandal dosh is also known as guru chandal dosha because of Jupiter is also known as guru and has a major role in this dosha. This is mostly malefic to the native but beneficial in some cases when the ketu and Jupiter are in the benefic positions in the birth chart.
Benefic Chandal dosha is called as "Ganesha yoga" and it is auspicious for the native. Pdt. J.L. Nehru can be considered the best example of this yoga.
Following are the effects which are the outcomes of the formation of Jupiter either with Rahu or Ketu.