Server-Side Rendering Error with @apollo/client 3.11.0 in NextJS 14.2.5

[apshenichniy]

Issue Description

I have a NextJS application using apollo/client v3.11.0. the following error occurs during server-side rendering:

Error: Missing getServerSnapshot, which is required for server-rendered content. Will revert to client rendering. at Object.useSyncExternalStore (/var/task/node_modules/.pnpm/next@14.2.5_@babel+core@7.24.5_@playwright+test@1.45.1_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/next/dist/compiled/next-server/app-page.runtime.prod.js:12:41308)

The snippet below triggered an error:

"use client";

const Component = () => {
....
  useSubscription(query, {
    fetchPolicy: "no-cache",
    onData: ({ data: { data } }) => {
      if (data) {
        setState(data);
      }
    },
  });

...
};

The error seems to be related to the implementation of the useSubscription hook. Specifically, it appears that the third parameter (callback for getServerSnapshot) is not being passed to the useSyncExternalStore hook: [Link](https://github.com/apollographql/apollo-client/blob/3d9eb47f292206272478056fa138e0a31d84b0aa/src/react/hooks/useSubscription.ts#L221)

Downgrading to @apollo/client version 3.10.8 resolves the issue.

Link to Reproduction

/

Reproduction Steps

No response

@apollo/client version

3.11.0

[jerelmiller]

Hey @apshenichniy 👋

You're right! We did some refactoring in useSubscription for 3.11 to better work with React Compiler, but looks like we forgot to add that 3rd argument for SSR. useSyncExternalStore was added in 3.11 with this.

I'll dig into this soon and try and figure out what we did before in the SSR case to ensure we mimic that here. Thanks for bringing this to our attention!

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[jerelmiller]

Hey @apshenichniy 👋

This was just released in 3.11.2. Please upgrade to that version and you should see the error go away. Thanks for reporting this!

[github-actions[bot]]

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