Angular2 cli generates 'Error: Trying to add a new entry to an already existing one' - angularjs

Question

I'm using the Angular2 Cli as the runtime environment for my Angular 2 application. I'm really impressed with its architecture, best of class development tools, and overall well-thought-out-ness (for lack of a better word).
However, about every fifth save (build) my server generates the error message:
Error: Trying to add a new entry to an already existing one:
I then have to kill the process and restart it to get around the problem.
Here is the full text:
file changed app/vtClass.ts
The Broccoli Plugin: [BroccoliTypeScriptCompiler] failed with:
Error: Trying to add a new entry to an already existing one: /home/vturner/vtstuff/angular/projects/ang2-cli2/tmp/broccoli_type_script_compiler-input_base_path-sdRX1KMo.tmp/0/src/app/ang2-cli2.spec.ts
at BroccoliTypeScriptCompiler._addNewFileEntry (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:212:13)
at /home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:159:38
at Array.forEach (native)
at BroccoliTypeScriptCompiler._doFullBuild (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:159:16)
at BroccoliTypeScriptCompiler._doIncrementalBuild (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:116:12)
at BroccoliTypeScriptCompiler.build (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:45:12)
at /home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/broccoli-caching-writer/index.js:152:21
at lib$rsvp$$internal$$tryCatch (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/rsvp/dist/rsvp.js:1036:16)
at lib$rsvp$$internal$$invokeCallback (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/rsvp/dist/rsvp.js:1048:17)
at lib$rsvp$$internal$$publish (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/rsvp/dist/rsvp.js:1019:11)
The broccoli plugin was instantiated at:
at BroccoliTypeScriptCompiler.Plugin (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/broccoli-plugin/index.js:10:31)
at BroccoliTypeScriptCompiler.CachingWriter [as constructor] (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/broccoli-caching-writer/index.js:21:10)
at BroccoliTypeScriptCompiler (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/broccoli-typescript.js:25:35)
at Angular2App.toTree (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/lib/broccoli/angular2-app.js:67:16)
at module.exports (/home/vturner/vtstuff/angular/projects/ang2-cli2/angular-cli-build.js:11:14)
at Class.module.exports.Task.extend.setupBroccoliBuilder (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:55:19)
at Class.module.exports.Task.extend.init (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:89:10)
at new Class (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/core-object/core-object.js:18:12)
at Class.module.exports.Task.extend.run (/home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/node_modules/angular-cli/lib/tasks/serve.js:15:19)
at /home/vturner/vtstuff/angular/projects/ang2-cli2/node_modules/angular-cli/node_modules/angular-cli/lib/commands/serve.js:70:22
I only seem to get the problem when there's a coding error, but that's not to say there's a 1-1 correspondence between coding errors and this message -- most coding errors I generate do not generate this message.
Once I get the error, the server seems to go into a blocked state where no matter what I do, including fixing the coding problem, will make the problem go away. It only goes away when I cycle the server.
It's getting really tedious to have to keep checking for this condition and cycling the server, which takes about 6s, to fix this.
I can post my code, but I don't see any rhyme or reason between the code and getting this message, so I don't think this will help i.e. I think it's an environmental issue and not a coding issue. I've tried deleting the tmp directory listed in the error message but this didn't work.
I start my server like so:
vturner#vturner-virtual-machine ~/vtstuff/angular/projects/ang2-cli2 $
sudo ng serve
Could not start watchman; falling back to NodeWatcher for file system events.
Visit http://www.ember-cli.com/user-guide/#watchman for more info.
Livereload server on http://localhost:49152
Serving on http://localhost:4200/
Build successful - 8049ms.
Slowest Trees | Total
----------------------------------------------+---------------------
BroccoliTypeScriptCompiler | 7643ms
Slowest Trees (cumulative) | Total (avg)
----------------------------------------------+---------------------
BroccoliTypeScriptCompiler (1) | 7643ms
file changed app/vtClass.ts
Build successful - 1072ms.
Note: I've been running the server as sudo, because I was either having permissions problems or I read somewhere that it runs faster as sudo (this last one may only be true on windows), but I don't think running as sudo is related to my problem.
Here is my package.json:
{
"name": "ang2-cli2",
"version": "0.0.0",
"license": "MIT",
"angular-cli": {},
"scripts": {
"start": "ng server",
"postinstall": "typings install --ambient",
"lint": "tslint src/**/*.ts",
"format": "clang-format -i -style=file --glob=src/**/*.ts",
"pree2e": "webdriver-manager update",
"e2e": "protractor"
},
"private": true,
"dependencies": {
"angular2": "2.0.0-beta.11",
"es6-shim": "^0.35.0",
"reflect-metadata": "0.1.2",
"rxjs": "5.0.0-beta.2",
"systemjs": "0.19.20",
"three": "^0.75.0",
"zone.js": "^0.6.4"
},
"devDependencies": {
"angular-cli": "0.0.*",
"angular-cli-github-pages": "^0.2.0",
"clang-format": "^1.0.35",
"codelyzer": "0.0.12",
"ember-cli-inject-live-reload": "^1.4.0",
"jasmine-core": "^2.3.4",
"jasmine-spec-reporter": "^2.4.0",
"karma": "^0.13.15",
"karma-chrome-launcher": "^0.2.1",
"karma-jasmine": "^0.3.6",
"protractor": "^3.0.0",
"ts-node": "^0.5.5",
"tslint": "^3.6.0",
"typescript": "^1.8.7",
"typings": "^0.6.6"
}
}
Can anyone tell me what I'm doing wrong, or what I can do to prevent this?
Many Thanks.

Answer 1

If you are a windows user , please run your terminal in administrative mode. I was facing the same problem , it worked for me :)