Can't run more than one vite instance in a Deno Monorepo

[mfrancis107]

Describe the bug

Not sure if this is a Vite, Esbuild or Deno issue.
There's related tickets for each.

May be Mac specific.

evanw/esbuild#4260
denoland/deno#30572

Reproduction

https://github.com/sedrino/deno-vite-test-bug

Steps to reproduce

Deno + Vite + Esbuild Bug

Run deno install

cd site-1
deno run -A npm:vite dev

Create second terminal

cd site-2
deno run -A npm:vite dev

Second site never runs. And afterwards restarting site-1 may not work also.

On macOS 15.4.1 (24E263)

System Info

System:
    OS: macOS 15.4.1
    CPU: (8) arm64 Apple M3
    Memory: 654.13 MB / 24.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 23.11.0 - ~/Library/pnpm/node
    npm: 10.9.2 - ~/Library/pnpm/npm
    pnpm: 10.11.1 - ~/Library/pnpm/pnpm
  Browsers:
    Chrome: 139.0.7258.157
    Safari: 18.4

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[hi-ogawa]

I couldn't reproduce on my linux pc. Can you elaborate what you mean by "Second site never runs"? Do you not even see logs like this?

# 1st terminal
[site-1]$ deno run -A npm:vite dev

  VITE v7.1.4  ready in 120 ms

  ➜  Local:   http://127.0.0.1:5173/
  ➜  Network: use --host to expose
  ➜  press h + enter to show help

# 2nd terminal
[site-2]$ deno run -A npm:vite dev
Port 5173 is in use, trying another one...

  VITE v7.1.4  ready in 92 ms

  ➜  Local:   http://127.0.0.1:5174/
  ➜  Network: use --host to expose
  ➜  press h + enter to show help

[hi-ogawa]

Let me close this since the issue seems to be Deno specific.

[acedward]

It looks mac specific, i cannot reproduce in linux - only macos.
it happens to bun users as well evanw/esbuild#4260