Why am I getting "Protocol not available" for named service

Solution Verified - Updated -

Issue

DNS server has below error in messages file.

Sep  9 04:01:10 XX named[3328]: errno2result.c:110: unexpected error:
Sep  9 04:01:10 XX named[3328]: unable to convert errno to isc_result: 92: Protocol not available

Environment

  • Red Hat Enterprise Linux 5.9
  • bind

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