Error in fine-tuning job - must follow '{"prompt": "<input text>", "completion": "<output text>"}' format

[jimmus69]

Describe the bug
When running 03_Model_customization/01_fine-tuning-titan-lite.ipynb or 02_fine-tuning_llama2.ipynb, the fine-tuning job fails with the error:

Input data at fine-tuning-datasets/train/train-cnn-5K.jsonl must follow '{"prompt": "<input text>", "completion": "<output text>"}' format

I have looked at the downloaded CNN data files, and they appear to be in the correct prompt/completion format.

To Reproduce

• Run the above notebooks
• Browse the Amazon Bedrock console > Foundation Models > Custom Models > Jobs

Expected behavior
Expected behaviour is for the fine-tuning job to complete successfully.

Screenshots

Desktop (please complete the following information):

• OS: Mac OSX
• Browser: Chrome
• Version: 125.0.6422.142

! Additional context !

• Sagemaker Studio Kernel: Data Science 3.0
  Files_from_s3.zip

• Instance used: ml.c5.2xlarge