Relevant telegraf.conf:

[[inputs.file]]
  files = [ "data.xml" ]
  name_override = "measurement_1"
  data_format = "value"
  data_type = "string"

Expected behavior:

The telegraf will work with this configuration

Actual behavior:

2020-11-04T10:19:56Z E! [telegraf] Error running agent: Error loading config file some_data.conf: plugin inputs.file: line 1: configuration specified the fields ["name_override" "data_type"], but they weren't used

Additional info:

I ran into this while testing after updating my branch after merging this PR - #7583.
Parameters for the parser are now marked as unused.

After that, I builded telegraf from the master branch, after which I encountered the error described above.

@ssoroka, take a look, please. The situation is reproduced on the master build.