Node.js Expres.js Heroku Toolbelt >Foreman Start - Error: write EINVAL

问题

This is the error I encountered with package.json when running foreman start with Heroku Toolbelt for Node.js

 "dependencies": 
{
    "express": "~4.4.0",
    "jade": "~1.3.1"
}

回答1:

I had the same issues as Jek. I was using express 4.4.4. I downgraded express 3.2.6 and it worked, but I shouldn't be forced to use an older version of express just because foreman doesn't support it.

I tried node-foreman. And it worked for me. I followed the instructions that included these steps:

1. npm install -g foreman
2. nf start

I would like to know if anyone has additional suggestions.

回答2:

I managed to fix this issue by changing express version to 3.2.6 as seen below

 "dependencies": 
{
    "express": "~3.2.6",
    "jade": "~1.3.1"
}

Then I deleted node_modules and did a npm install. Following this a foreman start works perfectly fine.

However I have no idea why it doesn't work when it runs on express 4 but it works when running on express 3.

来源：https://stackoverflow.com/questions/24015393/node-js-expres-js-heroku-toolbelt-foreman-start-error-write-einval