what one expects for error retries.
it depends on whether the error is likely to resolve on retries or not.
Eventually it will give up but not until many retries have taken place.
able to see why an individual document failed to index.
> 05-30-2018 10:37:11.598 extract [TikaTransformer] file:/file1..
> 05-30-2018 10:28:49.251 extract [TikaTransformer] file: /file1.. ..
> be terminated by itself.