FailedDocuments => ArrayRef[Paws::Kendra::BatchPutDocumentResponseFailedDocument]

A list of documents that were not added to the index because the document failed a validation check. Each document contains an error message that indicates why the document couldn't be added to the index.

If there was an error adding a document to an index the error is reported in your AWS CloudWatch log. For more information, see Monitoring Amazon Kendra with Amazon CloudWatch Logs (https://docs.aws.amazon.com/kendra/latest/dg/cloudwatch-logs.html)

_request_id => Str