Summary
On April 4, 2020 at 10:07 UTC, we deployed a version of Generic Extractor which contained a bug.
Some Generic Extractor jobs failed with the following error:
CSV file "XXX" file name is not a valid table identifier, either set output mapping for "XXX" or make sure that the file name is a valid Storage table identifier.
Generic Extractor was reverted to its previous version at 14:08 UTC. The error affected 10% of all Generic Extractor jobs running during the four-hour period. We sincerely apologize for the trouble this may have caused you.
What Happened?
We changed the output generation rules so tables are always generated even if empty. Table names are normally generated using the outputBucket setting. However, it can also be done using undocumented alternative settings via ID or name properties. Unfortunately, the new code did not take the alternative settings into account and failed to generate correct table names.
What Are We Doing About This?
We have extended the tests to cover the undocumented settings, though we recommend you stick with the documented ones.