Query a DataSet: random "400: Internal server errors"

user002228
user002228
in Connectors

I've created a connector that pulls the data from the big Dataset (~2M records) using the Dataset Query API.

Since the Dataset Query API does not support exporting huge datasets as CSV I used Querying by 50000 record with limit and incremental offset, so I'm making several HTTP requests to the Dataset like:

  1. request POST https://api.domo.com/v1/datasets/query/execute/ce79d23f-ef7d-4318-9787-ebde54a8c5b4 Accept: application/json Authorization: bearer <your-valid-oauth-access-token> {"sql": "SELECT * FROM table ORDER BY "ID" LIMIT 50000"}
  2. request POST https://api.domo.com/v1/datasets/query/execute/ce79d23f-ef7d-4318-9787-ebde54a8c5b4 Accept: application/json Authorization: bearer <your-valid-oauth-access-token> {"sql": "SELECT * FROM table ORDER BY "ID" LIMIT 50000 OFFSET 50000"}
  3. ..."sql": "SELECT * FROM table ORDER BY "ID" LIMIT 50000 OFFSET 100000"}

I'm making requests until all the data is fetched.

The problem is that the DOMO Query API periodically returns responses with 400 status code and `There was a problem executing the SQL query: Underlying service error: Internal Server Error` message. I assume DOMO API server is under load and fails to execute queries for a specified amount of time. If you retry the same request in few minutes it will be successful.

The question is: is there any way to prevent these 400 bad responses? Or is there any way to determine that the server is under load? I have a retry logic for requests but this will cause another issue - the dataset has federated data which updates periodically and since I can not pull all the data by API at once this can cause data inconsistency.

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