Alan Woodward 66bb1eea98 Improve error messages on bad [format] and [null_value] params for date mapper (#61932)
Currently, if an incorrectly formatted date is passed as a null_value for a date field mapper
configuration, you get a vague error:

Failed to parse mapping [_doc]: cannot parse empty date
Similarly, if you pass an incorrect format, you get the error:

Failed to parse mapping [_doc]: Invalid format [...]
This commit improves both these errors by including the mapper name and parameter that
are misconfigured.

Fixes #61712
2020-09-04 14:13:28 +01:00
..