Some of our users are seeing the exception “ApolloError: value.toString is not a function” from a useQuery hook on one of our GraphQL queries. We haven’t been able to reproduce the error. Do you have any idea what might cause this or how we can prevent it? We are on Apollo 3.9.10

One common feature is that so far all the affected users seem to be on Windows >= 10

Is there any stack trace attached? I’ve looked at the AC sources and I don’t believe that this originates in our codebase - the only method call this could occur is here: apollographql/apollo-client/blob/d42d9e09f6e887d2e862784eb601a8bda5802f11/src/utilities/common/makeUniqueId.ts#L8 …

[Screenshot 2024-12-06 at 9.50.24 am]

There is a second set with the same error from a different source in our app. Both go through QueryManager.js: [Screenshot 2024-12-06 at 9.53.11 am]

Unfortunately that’s only the stacktrace of ApolloError, which wraps around the original error which is thrown waaaay sooner to bring it into a predictable format. Is there any chance you can access error.cause and look at the stack trace of that?

Scratch that, in your version error.cause probably doesn’t exist yet. You’d have to look at error.networkError, error.graphQLErrors, error.protocolErrors and error.clientErrors to find the possible original error.

We are experiencing the same problem and found that it is related to some code coming from kaspersky anti-virus. The stack trace lead us to some function called copyHeaders() on Kaspersky side that proxies the native fetch() function. It happens only with requests using apollo client. Stacktrace: …

Yes, I discovered that this morning. There’s a conversation happening over in the Kaspersky forums. Thanks for your help Lenz and Nitzan. [image] Kaspersky is breaking ApolloClient requests(GraphQL) Not sure this is the right forum, please redirect to the relevant one if there is one. W…

We encountered something similar with a Safari extension before, and made changes on our side that should make this less likely to happen - if you can, please try to update to Release v3.11.8 · apollographql/apollo-client · GitHub

@NitzanSirota as you reported in the other thread that you are updating, please keep me posted if the update really resolves the issue. I’m still trying to reproduce the problem on my end.

ApolloError: value.toString is not a function

Client SDKs

NitzanSirota December 10, 2024, 8:00am 13

I’m working on checking newer version of apollo on one of our machines, I’ll update in about 1 hour

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ApolloError: value.toString is not a function

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