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Add information about retrying on 429 error code #23153

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Sep 2, 2024
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Add information about retrying on 429 error code #23153

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9 changes: 7 additions & 2 deletions docs/src/main/sphinx/develop/client-protocol.md
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Expand Up @@ -25,8 +25,13 @@ links.
If the client request returns an HTTP 502, 503, or 504, that means there was
an intermittent problem processing request and the client should try again in
50-100 ms. Trino does not generate those codes by itself, but those can be
generated by gateways/load balancers in front of Trino. Any HTTP status other
than 502, 503, 504 or 200 means that query processing has failed.
generated by load balancers in front of Trino.

Additionally, if the request returns a 429 status code, the client should
retry the request using the `Retry-After` header value provided.

Any HTTP status other than 502, 503, 504 or 200 means that query processing
has failed.

The `/v1/statement` `POST` request returns a JSON document of type
`QueryResults`, as well as a collection of response headers. The `QueryResults`
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