Nuxt•2mo ago

nuxt build warning

<--- Last few GCs ---> [11640:0000027314214000] 393349 ms: Mark-Compact 4027.5 (4135.5) -> 4015.1 (4139.3) MB, pooled: 0 MB, 1263.36 / 0.00 ms (average mu = 0.586, current mu = 0.030) allocation failure; scavenge might not succeed [11640:0000027314214000] 395876 ms: Mark-Compact 4032.9 (4140.6) -> 4020.2 (4144.3) MB, pooled: 0 MB, 2468.70 / 0.00 ms (average mu = 0.314, current mu = 0.023) allocation failure; scavenge might not succeed <--- JS stacktrace ---> FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory ----- Native stack trace ----- 1: 00007FF7228EA397 void cdecl node::SetCppgcReference(class v8::Isolate * ptr64,class v8::Local<class v8::Object>,void * ptr64)+18119 2: 00007FF72284B1D8 DSA_meth_get_flags+103768 3: 00007FF723452591 private: void cdecl v8::Isolate::ReportExternalAllocationLimitReached(void) ptr64+65 4: 00007FF72343F116 public: bool cdecl v8::Function::Experimental_IsNopFunction(void)const ptr64+3302 5: 00007FF72329B860 protected: cdecl v8::internal::StrongRootAllocatorBase::StrongRootAllocatorBase(class v8::Isolate * ptr64) ptr64+33904 6: 00007FF723297EEA protected: cdecl v8::internal::StrongRootAllocatorBase::StrongRootAllocatorBase(class v8::Isolate * ptr64) ptr64+19194 7: 00007FF7232AE4CC public: class v8::HeapProfiler * ptr64 cdecl v8::Isolate::GetHeapProfiler(void) ptr64+8012 8: 00007FF7232AED4A public: class v8::HeapProfiler * ptr64 cdecl v8::Isolate::GetHeapProfiler(void) ptr64+10186 9: 00007FF7232BF73B public: class v8::HeapProfiler * ptr64 cdecl v8::Isolate::GetHeapProfiler(void) ptr64+78267 10: 00007FF722F8C83B private: cdecl v8::base::AddressSpaceReservation::AddressSpaceReservation(void * ptr64,unsigned int64) ptr64+323419 11: 00007FF6C34ED4BA ELIFECYCLE Command failed with exit code 134. how to fix it?

message.txt

14 Replies

kapa.ai•2mo ago

Hi @Zhaolin Lau. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The error message you are seeing (FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory) during the Nuxt build process indicates that Node.js has run out of memory while building your project. This is a common issue for large projects or when there are memory leaks or inefficient memory usage during the build. Based on the knowledge sources, here are some relevant points and suggestions: 1. Memory Leaks and Inefficient Memory Usage - There have been several improvements in Nuxt to address memory leaks and reduce memory usage, such as deallocating out-of-scope references, improving cache management, and optimizing how payloads and templates are handled during the build and runtime. These improvements are included in recent Nuxt versions and can help reduce memory consumption during builds if you are using an up-to-date version of Nuxt [perf: deallocate out-of-scope references], [perf(nuxt): use browser cache for payloads], [perf(nuxt): use getters to reduce template string copies in vfs]. 2. Upgrading Nuxt and Dependencies - If you are not on the latest Nuxt version, consider upgrading. Some memory issues and warnings have been resolved in newer releases. For example, upgrading Nuxt and related modules has resolved component resolution warnings and improved memory handling in some cases [Stack Overflow: Two component files resolving]. 3. Node.js Heap Size - While not explicitly mentioned in the knowledge sources, a common workaround for this error is to increase the Node.js heap size during the build process. This can be done by setting the NODE_OPTIONS environment variable:

     NODE_OPTIONS="--max-old-space-size=4096" nuxi build

     NODE_OPTIONS="--max-old-space-size=4096" nuxi build

Replace 4096 with a value (in MB) appropriate for your system's available memory. 4. Check for Custom Code Issues - Memory leaks can also be caused by custom plugins, modules, or code that retains references or caches data unnecessarily. Review your code for such patterns, especially in plugins, modules, or long-lived objects [perf: deallocate out-of-scope references]. 5. Cache Management - Nuxt 3 introduced automatic purging of cached data from useAsyncData and nuxtApp.static.data on route navigation to prevent memory leaks. Ensure you have not disabled this feature in your nuxt.config.ts:

     export default defineNuxtConfig({
       experimental: {
         purgeCachedData: true // should be true (default)
       }
     })

     export default defineNuxtConfig({
       experimental: {
         purgeCachedData: true // should be true (default)
       }
     })

[purgeCachedData] If you have already tried these steps and the issue persists, you may need to further investigate your project's custom code or dependencies for memory leaks. Summary:
- Upgrade Nuxt and dependencies to the latest versions. - Increase Node.js heap size if needed. - Review custom code for memory leaks. - Ensure cache purging is enabled. If the problem continues after these steps, please provide more details about your Nuxt version and project setup for more targeted advice. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@520675622830342144> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Zhaolin LauOP•2mo ago

@kapa.ai it happens when ssr true

kapa.ai•2mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- When ssr: true is enabled in your Nuxt configuration, Nuxt will render HTML on the server side, which can increase memory usage during the build and runtime, especially for large projects or content-heavy sites. The out-of-memory error you are seeing is a result of Node.js running out of heap space during this process. The knowledge sources confirm that SSR is enabled by default (ssr: true) and that disabling it (ssr: false) will prevent HTML from being rendered on the server, but this is not usually desirable for SEO and performance reasons [Nuxt 3 SSR config], [Nuxt 4 SSR config]. Recent Nuxt updates have included improvements to memory usage and cache management, which can help reduce memory consumption during SSR builds. For example, changes have been made to how payloads are cached and how template strings are managed, both of which can help with memory issues during SSR [perf(nuxt): use browser cache for payloads], [perf(nuxt): use getters to reduce template string copies in vfs]. What you can do: - Make sure you are using the latest version of Nuxt, as many memory-related issues have been addressed in recent releases. - If you are still experiencing out-of-memory errors with SSR enabled, you may need to review your project for large data usage or memory leaks, and consider optimizing your code or data handling. The knowledge sources do not provide a specific step-by-step solution for this error beyond these general recommendations. If upgrading and optimizing do not resolve the issue, you may need to further investigate your project's specific memory usage patterns. Summary:
- SSR increases memory usage during build. - Recent Nuxt versions have improved memory handling. - Upgrade Nuxt and optimize your project for large builds. If you need more detailed troubleshooting, please provide your Nuxt version and any custom modules or plugins you are using. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@520675622830342144> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Zhaolin LauOP•2mo ago

@kapa.ai how to debug which file memory leak?

kapa.ai•2mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To debug which file is causing a memory leak in your Nuxt project, you can use several built-in and external tools to analyze memory usage and identify problematic files or code: 1. Nuxt DevTools
Nuxt DevTools provides insights into your app, including a timeline for rendering, an asset inspector, and a render tree to help you spot performance bottlenecks and large files. Use the "Inspect" feature to see all files used in your app, their sizes, and evaluation times. This can help you narrow down which files might be contributing to high memory usage or leaks [Nuxt DevTools]. 2. Sourcemaps and Debugging
Enable sourcemaps in your nuxt.config to get detailed stack traces and file references during debugging:

export default defineNuxtConfig({
  sourcemap: {
    server: true,
    client: true,
  },
})

export default defineNuxtConfig({
  sourcemap: {
    server: true,
    client: true,
  },
})

You can then use Node Inspector or your IDE's debugger to step through server-side code and monitor memory usage [Debugging]. 3. Node Inspector
Start your Nuxt app in dev mode with the inspector:

nuxt dev --inspect

nuxt dev --inspect

Attach Chrome DevTools or your IDE to the Node process. You can take heap snapshots and analyze memory allocations, which will be mapped to your source files if sourcemaps are enabled [Debugging]. 4. Profiling Tools
Use external tools like Chrome DevTools (Memory tab) to take heap snapshots and compare them before and after certain actions. This helps you see which objects (and from which files) are not being garbage collected [Nuxt DevTools]. Summary:
- Use Nuxt DevTools to inspect file sizes and performance. - Enable sourcemaps for better stack traces. - Use Node Inspector and Chrome DevTools to take heap snapshots and analyze memory allocations by file. - Compare snapshots to identify which files or modules are leaking memory. If you need more advanced analysis, you may need to create minimal reproductions and incrementally add code to isolate the leak [Reporting Bugs]. The knowledge sources do not provide a tool that directly points to the exact file causing a memory leak, but the above methods are the recommended approach for debugging such issues in Nuxt. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@520675622830342144> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Zhaolin LauOP•2mo ago

@kapa.ai what if put function inside state?

kapa.ai•2mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- You should not put a function inside state managed by useState in Nuxt. The knowledge sources clearly state that the data inside useState will be serialized to JSON, and therefore must not contain anything that cannot be serialized, such as classes, functions, or symbols. If you put a function inside state, it will not be preserved and can cause unexpected behavior or errors during SSR and hydration:

Because the data inside useState will be serialized to JSON, it is important that it does not contain anything that cannot be serialized, such as classes, functions or symbols.

Nuxt 3 useState docs
Nuxt 4 useState docs Always store only serializable data (objects, arrays, numbers, strings, etc.) in your Nuxt state. If you need to use functions, define them outside of the state object. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@520675622830342144> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Zhaolin LauOP•2mo ago

@kapa.ai css: ['~/assets/scss/app.scss'], Cannot find module '/scss/app.scss' imported from 'virtual:nuxt:C%3A%2FUsers%2Fzhaol%2FProjects%2Fbluevyadmin-nuxt%2F.nuxt%2Fcss.mjs'

kapa.ai•2mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- The error Cannot find module '/scss/app.scss' imported from ... .nuxt/css.mjs usually means that Nuxt cannot resolve the path you provided in the css array of your nuxt.config.ts. According to the knowledge sources, the correct way to reference a local SCSS file is to use the ~/assets/ or @/assets/ alias, which points to your project's assets directory. Correct usage:

export default defineNuxtConfig({
  css: ['~/assets/scss/app.scss'],
})

export default defineNuxtConfig({
  css: ['~/assets/scss/app.scss'],
})

Make sure that: - The file actually exists at project-root/assets/scss/app.scss. - You are using the correct alias (~/assets/scss/app.scss), not /scss/app.scss or similar. Nuxt will automatically resolve the file if the path and alias are correct [Nuxt 4 Styling], [Nuxt 4 API: css]. If you still get the error, double-check the file path and ensure there are no typos. If you are working within a Nuxt layer, remember that relative paths in nuxt.config are resolved relative to the user's project, not the layer, so use the full resolved path if needed [Relative Paths and Aliases]. Summary:
- Use ~/assets/scss/app.scss in your config. - Ensure the file exists at that path. - Do not use /scss/app.scss (missing the assets alias). If the problem persists after these checks, please verify your project structure and Nuxt version. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@520675622830342144> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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