Server Action Body Size Limit does not apply in production environment

[renato-viasoft]

I have a server action that uploads a file to an OCI Object Storage.
The file can be up to 256Mb
I added the configuration to next.config.mjs as stated in the documentantion

/** @type {import('next').NextConfig} */
const nextConfig = {
  experimental: {
    optimizePackageImports: ['@chakra-ui/react'],
    serverActions: {
      bodySizeLimit: 100 * 1024 * 1024,
    }
  },
  reactStrictMode: true,
};

export default nextConfig;

But i still have the following log in my application

[Error: Body exceeded 1 MB limit.
                To configure the body size limit for Server Actions, see: https://nextjs.org/docs/app/api-reference/next-config-js/serverActions#bodysizelimit] {
  statusCode: 413
}
 ⨯ uncaughtException:  [Error: Body exceeded 1 MB limit.
                To configure the body size limit for Server Actions, see: https://nextjs.org/docs/app/api-reference/next-config-js/serverActions#bodysizelimit] {
  statusCode: 413
}

I am at a loss of what to do.

For instance, this is my Dockerfile

FROM <base-image> AS build

WORKDIR /app/dev

COPY package.json package-lock.json ./ 

RUN npm install

COPY . .

RUN rm  -f src/environment/environment.ts
RUN mv src/environment/environment.prod.ts src/environment/environment.ts
RUN npm run build

FROM node:22-alpine AS production

ARG VERSION_NUMBER=0

WORKDIR /app

COPY --from=build /app/dev/.next ./.next
COPY --from=build /app/dev/public ./public
COPY --from=build /app/dev/prisma ./prisma
COPY --from=build /app/dev/package.json ./package.json
COPY --from=build /app/dev/package-lock.json ./package-lock.json
COPY --from=build /app/prod/node_modules ./node_modules

ENV VERSION=${VERSION_NUMBER}
ENV NODE_ENV=production

RUN npx prisma generate

CMD ["npm", "start"]

EXPOSE 3000

And this is my package.json

{
  "name": "vschat",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev --turbopack --port 3001",
    "dev-debug": "next dev --port 3001",
    "prebuild": "prisma generate",
    "build": "next build",
    "start": "next start",
    "lint": "next lint",
    "check": "tsc --noEmit"
  },
  "dependencies": {
    "@chakra-ui/react": "^3.13.0",
    "@emotion/react": "^11.14.0",
    "@emotion/styled": "^11.13.0",
    "@hookform/resolvers": "^3.9.0",
    "@mui/icons-material": "^6.1.1",
    "@mui/lab": "^6.0.0-beta.16",
    "@mui/material": "^6.4.4",
    "@mui/system": "^6.4.7",
    "@prisma/client": "^6.4.1",
    "@stomp/stompjs": "^7.0.0",
    "@tanstack/react-query": "^5.67.3",
    "@tanstack/react-table": "^8.21.2",
    "@zag-js/file-upload": "^1.2.1",
    "@zag-js/file-utils": "^1.2.1",
    "axios": "^1.7.9",
    "dayjs": "^1.11.13",
    "firebase": "^10.13.2",
    "firebase-admin": "^13.2.0",
    "fuse.js": "^7.0.0",
    "js-cookie": "^3.0.5",
    "lucide-react": "^0.475.0",
    "next": "^15.2.2",
    "next-themes": "^0.4.4",
    "react": "^19.0.0",
    "react-dom": "^19.0.0",
    "react-hook-form": "^7.53.0",
    "react-icons": "^5.5.0",
    "react-markdown": "^9.0.1",
    "react-syntax-highlighter": "^15.6.1",
    "react-use": "^17.6.0",
    "remark-gfm": "^4.0.0",
    "wavesurfer.js": "^7.9.0",
    "zod": "^3.23.8"
  },
  "devDependencies": {
    "@chakra-ui/cli": "^3.13.0",
    "@types/js-cookie": "^3.0.6",
    "@types/node": "^20",
    "@types/react": "19.0.10",
    "@types/react-dom": "19.0.4",
    "@types/react-syntax-highlighter": "^15.5.13",
    "@typescript-eslint/eslint-plugin": "^7.18.0",
    "@typescript-eslint/parser": "^7.18.0",
    "eslint": "^8.57.1",
    "eslint-config-airbnb": "^19.0.4",
    "eslint-config-airbnb-typescript": "^18.0.0",
    "eslint-config-next": "15.1.7",
    "eslint-plugin-import": "^2.25.3",
    "eslint-plugin-jsx-a11y": "^6.5.1",
    "eslint-plugin-react": "^7.28.0",
    "eslint-plugin-react-hooks": "^4.3.0",
    "husky": "^9.1.7",
    "prisma": "^6.4.1",
    "typescript": "^5"
  },
  "overrides": {
    "@types/react": "19.0.10",
    "@types/react-dom": "19.0.4"
  }
}

I'd love to receive some help in this matter.

[krystianmolas]

Does that action pass? We have a similar issue, but from the opposite side. We have set a limit, yet despite this limit, the server action goes through, and this error serves more as a log.

[renato-viasoft]

It does'nt