Both calls resulted in a response without a document and HTTP Code 504 - Gateway Timeout.
As this happens within a sequence of API calls, this is followed by a series of calls resulting in HTTP Code 503 - Service unavailable. This remains for some minutes (2-5) even though I have inserted several seconds of delay between calls.
By skipping these paths one by one, I managed to narrow the issue down to exactly these two documents.
I was facing a reproducable issue when requesting a PDF with these two paths with nothing but the accepted content type being set to PDF:
https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/4.0.3 https://vocabularies.cessda.eu/v2/vocabularies/ModeOfCollection/4.0.0
Both calls resulted in a response without a document and HTTP Code 504 - Gateway Timeout.
As this happens within a sequence of API calls, this is followed by a series of calls resulting in HTTP Code 503 - Service unavailable. This remains for some minutes (2-5) even though I have inserted several seconds of delay between calls.
By skipping these paths one by one, I managed to narrow the issue down to exactly these two documents.