[🐛 Bug]: Instrumentation is not called on Next.js v15

[gregberge]

next-on-pages environment related information

System:
Platform: darwin
Arch: arm64
Version: Darwin Kernel Version 24.2.0: Fri Dec 6 19:01:59 PST 2024; root:xnu-11215.61.5~2/RELEASE_ARM64_T6000
CPU: (10) arm64 Apple M1 Max
Memory: 32 GB
Shell: /bin/zsh
Package Manager Used: npm (10.9.0)

Relevant Packages:
@cloudflare/next-on-pages: 1.13.7
vercel: 37.8.0
next: 15.1.3

Description

I am from GitBook, we use Next.js on Cloudflare using next-on-pages. Here is the instrumentation.ts file.

I made lot of tests and it seems that register in instrumentation.ts is not called when running on Cloudflare, also onRequestError is not called.

Reproduction

Add instrumentation.ts, add a log in the register and onRequestError, locally you can see the log, on Cloudflare, you don't.

Pages Deployment Method

None

Pages Deployment ID

No response

Additional Information

No response

Would you like to help?

• Would you like to help fixing this bug?

[tttttahiti]

related #678

[gregberge]

related #678

I mitigated this bug by downgrading Sentry, but even by doing so, the instrumentation file is not called at all. So it's two different problemd. #678 is only relative to Sentry, this one concerns anything in instrumentation.ts, even a simple log.

[rkristelijn]

Supported Next.js versions
@cloudflare/next-on-pages supports all minor and patch version of Next.js 13 and 14. We regularly run manual and automated tests to ensure compatibility.

https://developers.cloudflare.com/pages/framework-guides/nextjs/ssr/supported-features/

Would like to learn when nextjs 15 will be supported

[james-elicx]

Would like to learn when nextjs 15 will be supported

It won't be officially supported. The focus has shifted to the OpenNext adapter.

[rkristelijn]

Thanks for the quick response, so NextJs 15 will be supported via opennext then?

https://opennext.js.org/cloudflare

Supported Next.js versions
@opennextjs/cloudflare is pre 1.0, and still in active development. We intend to support all minor and patch versions of Next.js 15 and the latest minor of Next.js 14.

[james-elicx]

Thanks for the quick response, so NextJs 15 will be supported via opennext then?

opennext.js.org/cloudflare

Supported Next.js versions
@opennextjs/cloudflare is pre 1.0, and still in active development. We intend to support all minor and patch versions of Next.js 15 and the latest minor of Next.js 14.

Yes