@apollo/gateway doesn't work with apollo-server-lambda since 0.9.0

• Package: @apollo/gateway
• Version: since v0.9.0
• Last known working version: v0.8.2

The server crashes with “Error: Expected undefined to be a GraphQL schema” when using new gateway version with apollo-server-lambda.

If you call gateway.load() manually and pass the schema and executor to the ApolloServer constructor, you get “Error: Apollo Server requires either an existing schema, modules or typeDefs”

Here’s a minimal reproducible example:

import { ApolloServer } from 'apollo-server-lambda';
import { ApolloGateway } from '@apollo/gateway';

const gateway = new ApolloGateway({
  serviceList: [
    { name: 'service-a', url: 'http://localhost:4001' },
  ],
});

const server = new ApolloServer({
  gateway,
  introspection: true,
  playground: true,
  subscriptions: false,
  context: ({ event, context }) => ({
    headers: event.headers,
    functionName: context.functionName,
    event,
    context,
  }),
});

exports.graphqlHandler = server.createHandler({
  cors: {
    origin: '*',
    credentials: true,
    methods: 'GET, POST',
    allowedHeaders: 'Origin, X-Requested-With, Content-Type, Accept, Authorization',
  },
});

Here’s what changed between the versions: b0a9ce0…99f78c6 (from a preliminary look gateway.load() seems to be the change that causes the issue).

[theoribeiro]

@trevor-scheer Any updates on this issue?

[trevor-scheer]

@nihalgonsalves thank you for the great issue report and reproduction. I’ve confirmed the bug (and also confirmed it doesn’t happen for apollo-server-express).

I’ll get back to this issue with an update within the week - I’ll need to do some digging and probably pick @abernix 's brain in order to understand what might be going on here, as I’m wholly unfamiliar with lambda. In the meantime, any results of further debugging on your end would be welcomed!