writeSingleFile doesn't create folders in s3

[jeremy-giaco]

I had some code that was working correctly with DariaWriters, where i wrote data to a Staging directory under a bucket in s3. The data was effectively moved from there to the bucket (root) and merged into a single file with a given name. When i changed my configuration to write the file with a prefix (folder) to the object name {bucket}/project-name/yyyymmdd/filename.csv} it looks successful, but file is not actually ever written. After going into s3 console and creating the folder structure, the same code wrote the file successfully.

[MrPowers]

Can you please send the exact code you ran? The code has this comments:

  // tmpFolder should look like s3a://bucket/data/src
  // filename should look like s3a://bucket/data/dest/my_cool_file.csv

Did you add s3a to your S3 paths?