Error occurs when Link elements with reference to the external URL

[ucym]

No description provided.

[redmunds]

I think I'm seeing the same problem. I have my project open to the Brackets repo. Every 20 seconds I see this set of messages:

Detect external changes: C:/Users/redmunds/dev/github/brackets/node_modules/grunt-contrib-less/node_modules/less/test/browser/css/urls.css (CSSCache.js:98)
Detect external changes: C:/Users/redmunds/dev/github/brackets/node_modules/grunt-contrib-less/node_modules/less/test/browser/css/relative-urls/urls.css (CSSCache.js:98)
Detect external changes: C:/Users/redmunds/dev/github/brackets/node_modules/grunt-contrib-less/node_modules/less/test/browser/css/rootpath/urls.css (CSSCache.js:98)
Detect external changes: C:/Users/redmunds/dev/github/brackets/node_modules/grunt-contrib-less/node_modules/less/test/browser/css/rootpath-relative/urls.css (CSSCache.js:98)
GET http://localhost:8081/test/browser/less/modify-this.css  (jquery-2.1.0.min.js:3)
GET http://localhost:8081/test/browser/less/modify-again.css  (jquery-2.1.0.min.js:3)
GET http://localhost:8081/test/browser/less/imports/modify-this.css  (jquery-2.1.0.min.js:3)
GET http://localhost:8081/test/browser/less/imports/modify-again.css  (jquery-2.1.0.min.js:3)
GET https://github.com/modify-this.css 404 (Not Found) (jquery-2.1.0.min.js:3)
GET https://github.com/modify-again.css 404 (Not Found) (jquery-2.1.0.min.js:3)
GET https://github.com/cloudhead/imports/modify-this.css 404 (Not Found) (jquery-2.1.0.min.js:3)
GET https://github.com/cloudhead/imports/modify-again.css 404 (Not Found) (jquery-2.1.0.min.js:3)

For the urls.css case, it has @import "http://localhost:8081/test/browser/less/modify-this.css";, so I suspect it may be the same issue. Looking at the code, it seems that this._lastUpdateCheck is never set. Setting that value in the failure case should at least limit the error to only showing once.

Also, Brackets now supports File Watchers, so your should be able to rewrite this more efficiently to remove the polling.

FYI, this was originally reported at adobe/brackets#6439.