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nextjs - 💡(How to fix) Fix controller[kState].transformAlgorithm is not a function on Node 20.16+ with Next.js 15.5 / React 19 streaming SSR

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Error Message

[TypeError: controller[kState].transformAlgorithm is not a function] { digest: '4198189704' }

Fix Action

Workaround

Pinned the production image to node:22-alpine. SSR streaming works on Node 22.

Code Example

[TypeError: controller[kState].transformAlgorithm is not a function] { digest: '4198189704' }
RAW_BUFFERClick to expand / collapse

To Reproduce

Run a Next.js 15.5.x app under React 19 on Node 20.16+ (reproduced on node:20.20.2-alpine). Every SSR streaming request fails server-side with:

[TypeError: controller[kState].transformAlgorithm is not a function] { digest: '4198189704' }

The browser stays at the Loading shell until client hydration recovers.

Current vs. Expected behavior

Expected: SSR streaming completes and rendered HTML reaches the client before hydration.

Actual: SSR throws inside Node's TransformStream internals; only the suspense fallback ships.

Environment

  • next: 15.5.14
  • react: 19
  • Node: 20.20.2-alpine (Alpine Linux container)

Workaround

Pinned the production image to node:22-alpine. SSR streaming works on Node 22.

Why a new issue

Prior reports (#68319, #75994) are both closed and #68319 is locked. The bug still reproduces on Next.js 15.5 + Node 20.16+.

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nextjs - 💡(How to fix) Fix controller[kState].transformAlgorithm is not a function on Node 20.16+ with Next.js 15.5 / React 19 streaming SSR