Grunt Concurrent cannot run too many tasks

问题

I'm trying to run multiple watch tasks with grunt, but it seems to not be able to. I'm using grunt concurrent, but it seems to only run a portion of the tasks I specify, stopping just short.

Here is the snippet of my gruntfile:

concurrent:
  compile:
    tasks: ["watch:app", "watch:html", "watch:images", "watch:lib", "watch:server"]
    options:
      logConcurrentOutput: true

When I run this, the output shows:

Running "concurrent:compile" (concurrent) task
Running "watch:images" (watch) task
Waiting...Running "watch:app" (watch) task
Waiting...Running "watch:html" (watch) task
Waiting...Running "watch:lib" (watch) task
Waiting...

For some reason, it's skipping my server task completely. I initially thought the server tasks was not setup correctly, but I can remove a watch task, and it will correctly run the server task along with the other 3, it just cannot run all 5 at once.

Am I implementing this inappropriately?

回答1:

So from the documentation, simply declare the amount of tasks you want. so in your case:

options:
      logConcurrentOutput: true
      limit: 5

By default it just uses how many cores your CPU has..

limit

Type: Number Default: Number of CPU cores (require('os').cpus().length) with a minimum of 2

Limit of how many tasks that are run concurrently.

https://github.com/sindresorhus/grunt-concurrent

来源：https://stackoverflow.com/questions/20865228/grunt-concurrent-cannot-run-too-many-tasks