Hello i’m encountering an error when running `grap...

# graphql-kotlin

[tim]

Hello i’m encountering an error when running graphqlIntrospectSchema in the 6.0.0-alpha.0 version. I’ve started my gql server and then i’m running ./gradlew graphqlIntrospectSchema --endpoint="<http://localhost:12017/api/public/graphql>"<http://localhost:12017/api/public/graphql> but this is failing with the following exception:

Execution failed for task ':graphqlIntrospectSchema'.
> There was a failure while executing work items
   > A failure occurred while executing com.expediagroup.graphql.plugin.gradle.actions.IntrospectSchemaAction
      > Unable to run introspection query against the specified endpoint=<http://localhost:12017/api/public/graphql>

No transformation found: class io.ktor.utils.io.ByteBufferChannel -> class kotlin.collections.Map
with response from <http://localhost:12017/api/public/graphql>:
status: 200 OK
response headers: 
Vary: Origin
, Content-Length: 34557
, Content-Type: text/plain; charset=UTF-8
, Connection: keep-alive

Any suggestions on what I’m doing wrong?

[Dariusz Kuc]

hello 👋 this sounds like a potential classpath issue.

If you could open an issue and provide a repo that reproduces that issue it would be great.

side note: I got an open PR that bumps up ktor dependency to 2.0 (another alpha will be cut once the batching and dep update PRs are merged) which may fix the issue

[tim]

signing off for fit the night, but will create a repo tomorrow

[vio]

Hi 👋 sorry I'm coming back to this a bit later. I've created a repo that reproduces this error, using version 6.0.0-alpha.1, and added the full logs in an issue: here

[Dariusz Kuc]

👋 Thanks for the code example but I don't think it reproduces your issue -> in your example project you have misconfigured graphql-kotlin plugin

Since you are configuring graphql { client { .... }} it will attempt to add corresponding tasks as a compile dependency. When you attempt to build/run your app it attempts to run introspection against localhost:8080/graphql which at that point in time does not exist yet - hence the Unable to run introspection query against the specified endpoint=<http://localhost:8080/graphql>

[Dariusz Kuc]

your original issue complains about missing serialization logic to map from byte buffer to a map

[Dariusz Kuc]

this sounds like a similar issue -> https://youtrack.jetbrains.com/issue/KTOR-1343
try setting up content type explicitly on the response

[vio]

Sorry about mixing those things up. Thanks for your explanation, makes sense and it clarified things for me. Setting up content type on the response fixed the introspection issue:

call.respondText(jsonString, ContentType.Application.Json)

and after I had the schema and added the graphql queries to resources, I managed to
get the graphql plugin to generate the files. I've pushed the fix to that repo as well.
Thank you very much 🙏

[Dariusz Kuc]

awesome 👍