发生了未处理的异常:作业名"..getProjectMetadata“不存在

Question

当我开始运行我的应用程序时，我会得到以下错误：

**[error] Error: Job name "..getProjectMetadata" does not exist.**
     at Observable._subscribe (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/src/experimental/jobs/simple-scheduler.js:350:23)
     at Observable._trySubscribe (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/Observable.js:44:25)
     at Observable.subscribe (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/Observable.js:30:22)
     at /Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/util/subscribeTo.js:22:31
     at Object.subscribeToResult (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/util/subscribeToResult.js:10:45)
     at SwitchMapSubscriber._innerSub (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/operators/switchMap.js:65:54)
     at SwitchMapSubscriber._next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/operators/switchMap.js:55:14)
     at SwitchMapSubscriber.Subscriber.next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/Subscriber.js:66:18)
     at SwitchMapSubscriber.notifyNext (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/operators/switchMap.js:86:26)
     at InnerSubscriber._next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/InnerSubscriber.js:28:21)
     at InnerSubscriber.Subscriber.next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/Subscriber.js:66:18)
     at /Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/util/subscribeTo.js:17:28
     at Object.subscribeToResult (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/util/subscribeToResult.js:10:45)
     at SwitchMapSubscriber._innerSub (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/operators/switchMap.js:65:54)
     at SwitchMapSubscriber._next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/operators/switchMap.js:55:14)
     at SwitchMapSubscriber.Subscriber.next (/Users/vasil/KSS/kssfrontend/node_modules/@angular-devkit/core/node_modules/rxjs/internal/Subscriber.js:66:18)

我有这样的版本：Angular CLI: 8.3.19，Node: 12.14.0。

知道是什么导致了这个问题吗？

Answer 1

这似乎是一个问题的@角-devkit/构建-角。

尝试通过运行

npm i @angular-devkit/build-angular

或者通过指定以前的版本来降低级别，例如

npm i @angular-devkit/build-angular@0.803.24

Answer 2

在npm audit发现正在使用的@angular-devkit/build-angular版本中存在漏洞后，出现了此错误。我运行了npm audit fix，它将其更新为0.900.2，但是当我运行ng serve时，它给出了问题中引用的错误。

我通过降级到0.803.25版本来解决这个问题。这是我能找到的最高版本，在运行ng serve时不会导致任何错误。npm audit发现的漏洞在此版本中得到解决。

这是我运行的命令：

npm i @angular-devkit/build-angular@0.803.25

Answer 3

我刚刚创建了一个新项目，并得到了这个错误。由于我没有需要使用的遗留代码，并且希望使用最新版本的ran，所以我运行了以下命令：

ng update @angular/cli @angular/core

它把一切都修好了。