Failed to revalidate route of a specific locale

Verify canary release

• I verified that the issue exists in Next.js canary release

Provide environment information

Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 21.4.0: Fri Mar 18 00:45:05 PDT 2022; root:xnu-8020.101.4~15/RELEASE_X86_64
Binaries:
  Node: 14.19.0
  npm: 6.14.16
  Yarn: 1.22.18
  pnpm: 6.32.6
Relevant packages:
  next: 12.1.5-canary.6
  react: 18.0.0
  react-dom: 18.0.0

What browser are you using? (if relevant)

Brave Version 1.37.111 Chromium: 100.0.4896.79 (Official Build) (x86_64)

How are you deploying your application? (if relevant)

Vercel

Describe the Bug

I have a page with the same template but different content depending on the locale. My locale configuration looks like this

i18n: {
  locales: ["default", "se", "no", "fi"],
  defaultLocale: "default",
  localeDetection: false,
},

I want to use the unstable_revalidate API to regenerate a specific page for a specific locale but when i call it with the page route (e.g., unstable_revalidate('/se/interview')) it results into an error as shown below:

Error: Failed to revalidate /se/interview: Invalid response undefined
    at unstable_revalidate (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/api-utils/node.js:238:15)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async handler (/Users/miguelvictor/DFProjects/sdworx/.next/server/pages/api/webhook-ondemand-isr.js:71:9)
    at async Object.apiResolver (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/api-utils/node.js:184:9)
    at async NextNodeServer.runApi (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/next-server.js:397:9)
    at async Object.fn (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/base-server.js:473:37)
    at async Router.execute (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/router.js:233:32)
    at async NextNodeServer.run (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/base-server.js:583:29)
    at async NextNodeServer.handleRequest (/Users/miguelvictor/DFProjects/sdworx/node_modules/next/dist/server/base-server.js:298:20)

For more context (not sure if this helps), i am returning { notFound: true } in my getStaticProps if the locale is default.

Expected Behavior

It should regenerate the page of that specific locale without any errors.

To Reproduce

Pretty much the same with the example

try {
    await res.unstable_revalidate('/se/interview')
    return res.json({ revalidated: true })
} catch (err) {
    console.error(err)
    return res.status(500).send("Error revalidating")
}

Update:

• I’m not using any middlewares in this project

[Ashwinvalento]

If you are using middleware to internally rewite the pages, then the revalidation link will also get rewritten. I spent a lot of time trying to figure this. You can check the header for x-prerender-revalidate and return without rewriting.

if (
    url.pathname.includes(".") || // exclude all files in the public folder
    url.pathname.startsWith("/api") || // exclude all API routes
    req.headers.has("x-prerender-revalidate") // exclude the revalidate request
  ) {
    return undefined;
  }

This worked for me.

[vnugent]

@vnugent are you not seeing a separate log that shows the reason for the 500 error? It should be logged at the page being revalidated

@ijjk No errors. According to the log, the page being validated ran fine (status 200). We’re not swallowing exceptions in getStaticProps(). So if there are any they should show up. Maybe I should open a support ticket?

*edit: I’ve looked at the log again. The target page was never called. Something must have caused the exception before the page was called.

The page component

export async function getStaticPaths (): Promise<any> {
  return {
    paths: [{ params: { uid: '<redacted>' } }],
    fallback: true
  }
}

export const getStaticProps: GetStaticProps<UserHomeProps> = async ({ params }) => {
 ...
  return {
    props: data
  }
}

...