Continue wait for GraphQL responses with http status code 500.

[nitzien]

Describe the bug Continue wait error for GraphQL responses with http status code 500.

To Reproduce Steps to reproduce the behavior:

1. Make a graphql query which would take more than 5 seconds (or reduce continueWait time configuration).

Expected behavior Though, we don't have this documented for graphql. for rest api it is documented to return with 200. Can we please have same http status code for graphql also. https://cube.dev/docs/http-api/rest/#prerequisites-continue-wait

Additional context From Slack thread- https://cube-js.slack.com/archives/C04NYBJP7RQ/p1684846190185819

@vasilev-alex

[igorlukanin]

It looks like this behavior is caused by the express-graphql library that is used by Cube to implement the GraphQL API: https://github.com/cube-js/cube/blob/b8de472b054f513732671e2211c4b2df1f811e99/packages/cubejs-api-gateway/src/gateway.ts#L230-L239

Unfortunately, this library is not maintained anymore. Probably, it should be replaced with a similar library first.

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[igorlukanin]

As a non-ideal workaround, I may suggest updating orchestrator_options (https://cube.dev/docs/reference/configuration/config#orchestrator_options) with a bigger continueWaitTimeout or, preferably, using pre-aggregations to speed up queries and eliminate "continue waits" completely.