Nuxt•23h ago

Node SSR exception logs

Hello, when an error occurs during SSR (500), client sees nice-looking error page, but when I look into logs of Node server running my Nuxt application with SSR, I cannot see the exception message and trace.

8 Replies

kapa.ai•23h ago

Hi @Meldiron. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Based on the knowledge sources provided, I can offer some information about handling and logging server-side rendering (SSR) errors in Nuxt. Nuxt has recently made improvements to error logging for SSR and prerendering errors. According to a recent pull request (https://github.com/nuxt/nuxt/pull/28895), Nuxt now provides more context for prerendering errors: 1. It prints out the stack trace of errors when prerendering. 2. It prints out the full error message on the console when prerendering and in production, as opposed to the sanitized 'internal server error' message which was previously used. This change should make it easier to see the exception message and trace in your Node server logs. Additionally, Nuxt provides hooks that can be used to capture and handle SSR errors. The Nitro App Hooks documentation (https://nuxt.com/docs/api/advanced/hooks#nitro-app-hooks-runtime-server-side) mentions an error hook that is called when an error occurs on the server side. You could use this hook to log errors more verbosely:

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('error', (error, { event }) => {
    // Log the full error details
    console.error('SSR Error:', error)
  })
})

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('error', (error, { event }) => {
    // Log the full error details
    console.error('SSR Error:', error)
  })
})

Furthermore, the Error Handling documentation (https://nuxt.com/docs/getting-started/error-handling) suggests that for Nitro server errors, while you cannot currently define a server-side handler, you can render an error page. If you're still not seeing the full exception details in your logs after implementing these suggestions, it might be worth checking your Nuxt and Nitro configurations to ensure that error logging is not being suppressed. You may also want to consider using a more robust logging solution that can capture and format error details more comprehensively. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•23h ago

<@287294735054274560> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

MeldironOP•23h ago

Here is the screenshot of console.

MeldironOP•23h ago

I tried to do console.log and console.error to prove logging works, and that indeed appears.

MeldironOP•23h ago

@kapa.ai I am on Nuxt 3.14, and PR seems to be mentioned in 3.12 release, so I should have those fixes. We are building a platform for serving any website, so we cannot go with a solution that requires specific code changes. I dont want to do errorr handling on error page, as that would show the error to end-user, which is not the intention here. @kapa.ai

kapa.ai•23h ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Based on your situation and requirements, I understand that you're using Nuxt 3.14 and are looking for a solution to log SSR errors without exposing them to end-users or requiring specific code changes for each website on your platform. Let me provide you with the most relevant information from the knowledge sources. You're correct that the improvements mentioned in the pull request should already be part of your Nuxt 3.14 version. However, it seems that you're still not seeing the full error details in your logs as expected. Given your constraints, one possible solution that doesn't require specific code changes for each website is to enable and utilize the devLogs feature. This feature, introduced in a recent pull request (https://github.com/nuxt/nuxt/pull/25936), allows for streaming server logs to the client during development. To enable this feature, you can add the following to your Nuxt configuration:

export default defineNuxtConfig({
  features: {
    devLogs: true
  }
})

export default defineNuxtConfig({
  features: {
    devLogs: true
  }
})

You can set devLogs to 'silent' if you want to prevent the logs from being printed to the browser console while still being able to consume them programmatically. Once enabled, Nuxt provides a dev:ssr-logs hook that you can use to capture these logs. According to the Hooks documentation (https://nuxt.com/docs/api/advanced/hooks), this hook is called with an array of server-side logs that have been passed to the client. You could set up a server-side plugin to capture these logs without modifying each individual website:

export default defineNuxtPlugin(() => {
  if (process.server) {
    nuxt.hook('dev:ssr-logs', (logs) => {
      // Here you can handle the logs as needed
      // For example, you could send them to a logging service
      console.log('SSR Logs:', logs)
    })
  }
})

export default defineNuxtPlugin(() => {
  if (process.server) {
    nuxt.hook('dev:ssr-logs', (logs) => {
      // Here you can handle the logs as needed
      // For example, you could send them to a logging service
      console.log('SSR Logs:', logs)
    })
  }
})

This approach allows you to capture detailed SSR error logs without exposing them to end-users or requiring changes to individual websites. However, it's important to note that this feature is primarily designed for development use. For production environments, you might need to explore additional logging solutions or consider implementing a global error handler at the platform level to capture and log errors without affecting the individual websites you're serving. If this solution doesn't fully address your needs, you may need to consider more advanced logging strategies or consult with the Nuxt community for more specific guidance on handling SSR errors in a multi-tenant environment. Nuxt Configuration: features (https://nuxt.com/docs/api/nuxt-config#features) Nuxt Hooks: dev:ssr-logs (https://nuxt.com/docs/api/advanced/hooks) ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•23h ago

<@287294735054274560> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

MeldironOP•22h ago

I dont think AI is useful here, sorry 🙈 Ill let it to the amazing community to help me out

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Node SSR exception logs