GraphQL query stops working - seems cache issue

It's breaking our prod site when GraphQL suddenly stops giving response. Lower environment it looks good. That's why increasing priority.

Confirming that this is an issue we are also experiencing. We use graphql_compose to generate schema.

I need to debug further but I'm observing the same behaviour on a site with GraphQL 8.x-4.9 and GraphQL Compose 2.2.1.

In our case all queries fail until the cache is rebuilt (a single cache clear consistently fixes the issue temporarily). Issue is sporadic and we haven't identified a consistent trigger for it.

We're running GraphQL 8.x-4.8 and are seeing the same issue w/ GraphQL queries not working after each deploy to production. We don't use GraphQL Compose.

A query to get the Commerce Orders in the GraphQL explorer, returns errors like this:

{
    "errors": [
        {
            "message": "Cannot query field \u0022derivative\u0022 on type \u0022FieldItemTypeImage\u0022.",
            "extensions": {
                "category": "graphql"
            },
            "locations": [
                {
                    "line": 88,
                    "column": 25
                }
            ]
        },
        {
            "message": "Cannot query field \u0022derivative\u0022 on type \u0022FieldItemTypeImage\u0022.",
            "extensions": {
                "category": "graphql"
            },
            "locations": [
                {
                    "line": 121,
                    "column": 25
                }
            ]
        },
...

After clearing cache a couple of more times, it starts working again.

Any update on this error ?
We suddenly have it too since this morning, our production site is broken, and clear cache doesn't solve anything :(

Hello,

We face the same issue here once with an apdated site (we restored backups to make it work again) and now we face it with a new dev website with Drupal 11.1.5 and GraphQL 8.x-4.11 and Graphql_compose 2.3.0.

We noticed this error GraphQL\Error\SyntaxError : Syntax Error: Cannot parse the unexpected character "\uc9". dans GraphQL\Language\Lexer->readToken()

And realized that this bug happend only after translation updates, if we revert our prod site, enable a new module that updates translation we have this bug again.
Are any of you using multilingual sites? Maybe this is a lead to find out what is wrong here?

After some disabling and enabling of graphQL and GraphQL Compose and returning to the explorer page between modifications we also notice that unticking the "Enable Singuliarize" checkbox in the "String inflector" tab of graphql_compose settings produces the same bug.
Maybe this issue is a graphql_compose issue and not a graphql issue.

Heya everyone,

If you are using graphql while also using memcache as your default cache backend, please introduce these lines to your settings:

$settings['cache']['bins']['graphql_ast'] = 'cache.backend.database';
$settings['cache']['bins']['graphql_results'] = 'cache.backend.database';

This should let graphql use the database tables for caching purposes which seems to make the random issues go away.

I didn't find this fix by myself but got permission to share it to the community.

Hope this helps!