What is "rajaka"

Rajaka, also Hena and Rada, is a minority Sri Lankan and Indian caste. "Rajas" means dirt in Sinhala and Pali or Sanskrit and "Rajaka" means the removers of dirt.They collected cloths by traveling home to home of higher castes but now that was obsolete in Sri Lanka.but still they performs several rituals in the weddings and the females of this caste performs vital role in the puberty rituals of Radala and Govigama people in some areas of Sri Lanka.They called "Redi nanda" for females and "Hene mama" for males by the Sri Lankan society because they were given some respect unlike the other Asian countries due to the influence of buddhism in early periods.It is known as Chakali in Andhra Pradesh,India. A group officially termed Rajaka, Chakali, Vannar has been designated an Other Backward Class in Andhra Pradesh since 1993.