Drop Impala UDF function returned NoSuchObjectException error

Impala UDF works a bit differently than Hive UDF, as they are written in different languages. Recently I have encountered an issue that when I try to drop Impala UDF written in C, it failed with below error: DROP FUNCTION udf_testing.has_vowels; Query: DROP FUNCTION udf_testing.has_vowels ERROR: ImpalaRuntimeException: Error making 'dropFunction' …