[next.config.js rewrites] Error: socket hang up

Verify canary release

• I verified that the issue exists in Next.js canary release

Provide environment information

    Operating System:
      Platform: linux
      Arch: x64
      Version: #1 SMP Wed Oct 28 23:40:43 UTC 2020
    Binaries:
      Node: 16.13.1
      npm: 8.1.2
      Yarn: N/A
      pnpm: N/A
    Relevant packages:
      next: 12.1.5
      react: 17.0.2
      react-dom: 17.0.2

What browser are you using? (if relevant)

No response

How are you deploying your application? (if relevant)

No response

Describe the Bug

When using rewrites it’s impossible to make a request to API endpoint that takes more than 30 seconds to respond. After 31 second Next just throws the error Server Error Error: socket hang up which makes it impossible to use with any responding APIs.

Expected Behavior

There should be a soft timeout which would not throw after 30 seconds but should proceed waiting for the response and only show a warning. Or provide additional option to set custom timeouts.

To Reproduce

Create a rewrite rule to the endpoint which responds more than 30 seconds.

[reuixiy]

Same issue here!

[mdaverde]

To add some additional details, this is happening to me sporadically without any rewrites off latest (12.2.3). I can try canary later today. It’s sporadic, but I’m more likely to see it right after server start.

And it is happening to me in production. I saw it some Sentry logs this morning. Hope some of this helps