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[BUG] Build Fails Due to Missing Durable Object Classes in Worker Configuration #502

@eposha

Description

@eposha

Describe the bug

When attempting to create an optimized production build, the process fails due to missing Durable Object classes in the worker configuration. The following warnings and errors are encountered:

workerd/server/server.c++:1951: warning: A DurableObjectNamespace in the config referenced the class "DurableObjectQueueHandler", but no such Durable Object class is exported from the worker. Please make sure the class name matches, it is exported, and the class extends 'DurableObject'. Attempts to call to this Durable Object class will fail at runtime, but historically this was not a startup-time error. Future versions of workerd may make this a startup-time error.

workerd/server/server.c++:1951: warning: A DurableObjectNamespace in the config referenced the class "DOShardedTagCache", but no such Durable Object class is exported from the worker. Please make sure the class name matches, it is exported, and the class extends 'DurableObject'. Attempts to call to this Durable Object class will fail at runtime, but historically this was not a startup-time error. Future versions of workerd may make this a startup-time error.

service core:user:__WRANGLER_EXTERNAL_DURABLE_OBJECTS_WORKER: Worker "core:user:__WRANGLER_EXTERNAL_DURABLE_OBJECTS_WORKER"'s binding "DurableObjectQueueHandler" refers to a service "core:user:worker", but no such service is defined.

unhandledRejection [MiniflareCoreError [ERR_RUNTIME_FAILURE]: The Workers runtime failed to start. There is likely additional logging output above.] {
  code: 'ERR_RUNTIME_FAILURE',
  cause: undefined
}

Error: Command failed: npm run build

Steps to reproduce

wrangler.json

{
  "$schema": "node_modules/wrangler/config-schema.json",
  "main": ".open-next/worker.js",
  "name": "my app",
  "compatibility_date": "2024-12-30",
  "compatibility_flags": ["nodejs_compat"],
  "minify": true,
  "assets": {
    "directory": ".open-next/assets",
    "binding": "ASSETS",
  },
  "placement": {
    "mode": "smart",
  },
  "observability": {
    "enabled": true,
  },
  "r2_buckets": [
    {
      "bucket_name": "dimlly-isr-tags",
      "binding": "dimlly_isr_tags",
    },
  ],

  "durable_objects": {
    "bindings": [
      {
        "name": "NEXT_CACHE_REVALIDATION_DURABLE_OBJECT",
        "class_name": "DurableObjectQueueHandler",
      },
      {
        "name": "NEXT_CACHE_DO_SHARDED",
        "class_name": "DOShardedTagCache",
      },
    ],
  },
  "migrations": [
    {
      "tag": "v1",
      "new_sqlite_classes": ["DurableObjectQueueHandler", "DOShardedTagCache"],
    },
  ],
}

open-next.config.ts

import { defineCloudflareConfig } from '@opennextjs/cloudflare';
import kvIncrementalCache from '@opennextjs/cloudflare/overrides/incremental-cache/kv-incremental-cache';
import memoryQueue from '@opennextjs/cloudflare/overrides/queue/do-queue';
import doShardedTagCache from '@opennextjs/cloudflare/overrides/tag-cache/do-sharded-tag-cache';

export default defineCloudflareConfig({
  incrementalCache: kvIncrementalCache,
  tagCache: doShardedTagCache({ baseShardSize: 12, regionalCache: true }),
  queue: memoryQueue,
});

Expected behavior

Fix

@opennextjs/cloudflare version

0.6.0

Wrangler version

4.5.0

next info output

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.3.0;
Binaries:
  Node: 23.5.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 9.15.4
Relevant Packages:
  next: 15.2.4
  eslint-config-next: 15.2.4
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.8.2
Next.js Config:
  output: N/A

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