Improved error message when index field type is unknown#122860

Samiul-TheSoccerFan merged 16 commits intoelastic:mainelastic/elasticsearch:mainfrom

Samiul-TheSoccerFan:improve-error-message-for-upsupported-mappingSamiul-TheSoccerFan/elasticsearch:improve-error-message-for-upsupported-mappingCopy head branch name to clipboard