rover graph introspect fails with HTTP 422 error after updating to latest version

[strasseneck]

Description

After updating to the latest version, 0.37.0 Rover graph introspect started failing with an HTTP 422 error. Previous version still works. This was first noticed in a CI workflow but also failed locally with the latest version, using the previous version fixed it both in the CI and locally.

Steps to reproduce

Using the latest version 0.37.0 run rover graph introspect against a valid GraphQL endpoint with introspection enabled

Expected result

Introspection should succeed and schema should be published.

Actual result

Publishing SDL to <graph_ref> using credentials from the default profile.
error[E004]: HTTP status client error (422 unknown) for url (<graphql_endpoint>)
        Make sure the endpoint is accepting connections and is spelled correctly
error: The SDL you passed was empty
        Make sure the command you are piping to Rover contains output.

Environment

[naomijub]

Can you share more information?

[strasseneck]

hey yeah sorry was a bit brief, here's some more info.

Rover versions

• Working: rover --version → 0.35.0
• Failing: rover --version → 0.37.0

Command being run

rover graph introspect "https:///graphql?introspection_token=<INTROSPECTION_TOKEN>"
| rover graph publish <graph_name>@ --schema -

Endpoint details

• Server type: custom internal GraphQL server (behind nginx)
• Introspection: enabled (previous Rover versions successfully introspect this endpoint)
• Auth mechanism: token passed via ?introspection_token=<INTROSPECTION_TOKEN> query parameter (no extra auth headers)

Behavior comparison

Older version (0.35.0) succeeds locally and in CI

rover graph introspect "<graphql_endpoint_with_token>"
| rover graph publish <graph_ref>@ --schema -

rover graph introspect "https:///graphql?introspection_token=<INTROSPECTION_TOKEN>"
| rover graph publish <graph_ref>@ --schema -

[notification about newer Rover version]

Publishing SDL to <graph_ref>@ using credentials from the default profile.
<graph_ref>@#<hash_redacted> published successfully
[Fields: +0 -0 △ 0, Types: +0 -0 △ <count_redacted>]
Schema Hash: <hash_redacted>

Version 0.37.0 fails with HTTP 422 on the same endpoint and same command

Full error output from 0.37.0

Publishing SDL to <graph_ref>@ using credentials from the default profile.
error[E004]: HTTP status client error (422 unknown) for url (<graphql_endpoint_with_token>)
Make sure the endpoint is accepting connections and is spelled correctly
error: The SDL you passed was empty
Make sure the command you are piping to Rover contains output.

If any additional debug flags or logs would help, I can rerun the command and provide them.