Build fails with - Missing onError handler for invocation 'building-schema'

[k31tha]

When using the option downloadImages: false the build fails with
ERROR
Missing onError handler for invocation 'building-schema', error was 'Error: Schema must contain uniquely named types but contains multiple types named "GatsbyImageLayout".'. Stacktrace was 'Error: Schema must contain uniquely named types but contains multiple types named
"GatsbyImageLayout".

[sslotsky]

Thanks for the issue. Two questions:

1. Does the same thing happen if you omit the downloadImages option entirely? This flag is treated as false by default so it's not required unless you want to download the images. I suspect you'll still have the issue though.
2. Is it possible to link your repo so we can reproduce and investigate? Whatever is happening, I suspect that it's specific to your project.

[davidpaulsson]

@sslotsky I can confirm this happens for me also. I don't have downloadImages set in my gatsby-config. It only happens when I have gatsby-source-contentful enabled alongside gatsby-source-shopify-experimental. I.e. when only using one or the other plugin it works, but not both at the same time. Also found this person on Twitter when searching for the issue.

Using

"gatsby": "^3.1.0",
"gatsby-source-contentful": "^5.1.0",
"gatsby-source-shopify-experimental": "^1.13.3",

Full error message

 ERROR 

Missing onError handler for invocation 'building-schema', error was 'Error: Schema must contain uniquely named types but contains multiple types named "GatsbyImageLayout".'. Stacktrace was 'Error:
Schema must contain uniquely named types but contains multiple types named "GatsbyImageLayout".
    at new GraphQLSchema (/path/node_modules/graphql/type/schema.js:194:15)
    at SchemaComposer.buildSchema (/path/node_modules/graphql-compose/lib/SchemaComposer.js:179:12)
    at buildSchema (/path/store/node_modules/gatsby/src/schema/schema.js:77:33)
    at build (/path/store/node_modules/gatsby/src/schema/index.js:105:18)
    at buildSchema (/path/store/node_modules/gatsby/src/services/build-schema.ts:19:3)'

After the error is thrown it's just stuck forever at ⠹ building schema.

[sslotsky]

Interesting! Thanks @davidpaulsson for the additional info, I think this will help us figure out the problem.

[rodneylab]

Hi @sslotsky, I am seeing the same issue as @davidpaulsson. I don't have downloadImages set either. Development build fails if I have both gatsby-source-contentful and gatsby-source-shopify-experimental enabled but succeeds if I drop either from gatsby-config.js. Project is here: https://github.com/rodneylab/rodneylab-100-days-of-gatsby/tree/dev__shopify_bug

Using

    "gatsby": "^3.1.2",
    "gatsby-source-contentful": "^5.1.2"
    "gatsby-source-shopify-experimental": "^1.16.0",

Error message:

 ERROR 

Missing onError handler for invocation 'building-schema', error was 'Error:
Schema must contain uniquely named types but contains multiple types named
"GatsbyImageLayout".'. Stacktrace was 'Error: Schema must contain uniquely named
 types but contains multiple types named "GatsbyImageLayout".
    at new GraphQLSchema (/Users/XXX/Documents/lab/sites/rodneylab-100-days
-of-gatsby/node_modules/graphql/type/schema.js:194:15)
    at SchemaComposer.buildSchema (/Users/XXX/Documents/lab/sites/rodneylab
-100-days-of-gatsby/node_modules/graphql-compose/lib/SchemaComposer.js:179:12)
    at buildSchema (/Users/XXX/Documents/lab/sites/rodneylab-100-days-of-ga
tsby/node_modules/gatsby/src/schema/schema.js:77:33)
    at build (/Users/XXX/Documents/lab/sites/rodneylab-100-days-of-gatsby/n
ode_modules/gatsby/src/schema/index.js:105:18)
    at buildSchema (/Users/XXX/Documents/lab/sites/rodneylab-100-days-of-ga
tsby/node_modules/gatsby/src/services/build-schema.ts:19:3)'

After the error is thrown it's just stuck forever at ⠹ building schema.

Let me know if you need more details.

[sslotsky]

Thanks @rodneylab! We are working with the gatsby-plugin-image maintainers on this. The problem arises when two different source plugins are using gatsby-plugin-image. Our apologies for the inconvenience!

[davidpaulsson]

No need to apologize to anyone! You're providing code we can make money with. All good in the hood! Thanks for your hard work 🙇

[davidpaulsson]

Any updates regarding this?

[sslotsky]

I just checked and I don't think gatsby-plugin-image has a fix for this yet. I'm following up with the team on this and can hopefully get a sense of their priority on it.

[ascorbic]

This is actually a bug in gatsby-source-contentful, rather than this plugin. I've opened a PR which should fix it.

[sslotsky]

Looks like the contentful PR was merged and a release has since been published. Closing this issue.

[rodneylab]

Thanks for sorting this Sam, works a treat now