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502 errors on datasource downloads from Tableau

Johan de Groot · 2020-11-08 ·

If you experience 502 errors when downloading large datasets from Tableau Server – either in a browser or Tableau Desktop – you might occur problems not related to Tableau Server, but a proxy or gateway in front of the server.

On Azure, an often used (and recommended) architecture is the use of a http gateway in front of Tableau Server. The default request timeout is set to 20 seconds, which is usually no problem for a usual website.
But if you download a large datasource Tableau first needs to ‘prepare’ the download, which can exceed these 20 seconds.

If you encounter these kind of problems, you should change the ‘Request time-out’ setting to a larger value. This figure should not be too high, but you could start by setting it to 60 seconds – if you still get these errors you can increase this further to e.g. 120 seconds.

Tableau, Tableau Server Azure

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