角度巨大的堆栈跟踪

我得到了283行的chrome控制台中的异常堆栈跟踪，涉及我的代码的行是80 - 81（搜索单词卡）。角度巨大的堆栈跟踪

at CardService.getCards (eval at 70 
(http://localhost:8080/app.js:142:1), <anonymous>:46:14) 
    at CardsComponent.ngOnInit (eval at 144 (http://localhost:8080/app.js:7:1), <anonymous>:19:26)

我想知道为什么所有的垃圾进入异常，并有办法摆脱它吗？

堆栈跟踪（降低少许）

(unknown) ERROR Error: Uncaught (in promise): Response with status: 
401 Unauthorized for URL: http://localhost:5000/api/user 
    at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:783:31) 
    at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:754:17) 
    at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:831:17) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31) 
    at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36) 
    at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47) 
    at drainMicroTaskQueue (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:595:35) 
    at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:502:21) 
    at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14) 
    at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17) 
    at ____________________Elapsed_13_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_ 
(http://localhost) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43) 
    at Zone.scheduleMicroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:255:25) 
    at scheduleResolveOrReject (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:829:14) 
    at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:778:21) 
    at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:754:17) 
    at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:831:17) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31) 
    at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36) 
    at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47) 
    at drainMicroTaskQueue (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:595:35) 
    at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:502:21) 
    at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14) 
    at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17) 
    at ____________________Elapsed_1_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_ 
(http://localhost) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43) 
    at Zone.scheduleMicroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:255:25) 
    at scheduleResolveOrReject (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:829:14) 
    at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:778:21) 
    at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:709:17) 
    at SafeSubscriber.eval [as _error] (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:68:85) 
    at SafeSubscriber.__tryOrUnsub (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:238:16) 
    at SafeSubscriber.error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:197:26) 
    at Subscriber._error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:128:26) 
    at Subscriber.error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:102:18) 
    at XMLHttpRequest.onLoad (eval at <anonymous> (http://localhost:8080/vendor.js:336:1), <anonymous>:1270:34) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31) 
    at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33) 
    at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36) 
    at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47) 
    at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:498:34) 
    at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14) 
    at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17) 
    at ____________________Elapsed_94_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_ 
(http://localhost) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43) 
    at Zone.scheduleEventTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:261:25) 
    at XMLHttpRequest.eval [as addEventListener] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1634:33) 
    at XMLHttpRequest.__zone_symbol__send (<anonymous>:1:682) 
    at ZoneTask.scheduleTask [as scheduleFn] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:2616:24) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:410:26) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:117:35) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29) 
    at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51) 
    at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43) 
    at Zone.scheduleMacroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:258:25) 
    at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:2640:29) 
    at XMLHttpRequest.proto.(anonymous function) [as send] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), 
<anonymous>:1221:20) 
    at Observable.eval [as _subscribe] (eval at <anonymous> (http://localhost:8080/vendor.js:336:1), <anonymous>:1314:18) 
    at Observable._trySubscribe (eval at <anonymous> (http://localhost:8080/vendor.js:6:1), <anonymous>:171:25) 
    at Observable.subscribe (eval at <anonymous> (http://localhost:8080/vendor.js:6:1), <anonymous>:159:65) 
    at eval (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:68:15) 
    at new ZoneAwarePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:847:29) 
    at Observable.toPromise (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:66:12) 
    at CardService.getCards (eval at 70 (http://localhost:8080/app.js:142:1), <anonymous>:46:14) 
    at CardsComponent.ngOnInit (eval at 144 (http://localhost:8080/app.js:7:1), <anonymous>:19:26) 
    at checkAndUpdateDirectiveInline (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:11038:19) 
    at checkAndUpdateNodeInline (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12534:17) 
    at checkAndUpdateNode (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12473:16) 
    at debugCheckAndUpdateNode (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13334:59) 
    at debugCheckDirectivesFn (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13275:13) 
    at Object.eval [as updateDirectives] (ng:///AppModule/CardsComponent_Host.ngfactory.js:8:5) 
    at Object.debugUpdateDirectives [as updateDirectives] (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), 
<anonymous>:13260:21) 
    at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12440:14) 
    at callViewAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12805:21) 
    at execEmbeddedViewsAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12763:17) 
    at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12441:5) 
    at callViewAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12805:21) 
    at execComponentViewsAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12737:13) 
    at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12446:5) 
    at callWithDebugContext (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13660:42) 
    at Object.debugCheckAndUpdateView [as checkAndUpdateView] (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), 
<anonymous>:13200:12) 
    at ViewRef_.detectChanges (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:10371:18) 
    at eval (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:5009:63) 
    at Array.forEach (<anonymous>)

来源

2017-07-27 eugenekr

你为什么在乎？ – Igor

@Igor - 这不是一个大问题，但仍然很烦人。为什么我必须滚动多个屏幕才能搜索问题的根源？在一天结束时，它会加起来。 – eugenekr

前2行也有关我会想？

(unknown) ERROR Error: Uncaught (in promise): Response with status: 401 Unauthorized for URL: http://localhost:5000/api/user

是不是该请求，让您的ngOnInit失败？

来源

2017-07-27 11:27:47

正确，它有助于找到问题的根源，但它太笼统了。我想看看我的代码中究竟发生了什么问题。由于某种原因，这些信息是在283行的中间。] – eugenekr

如果你用'catch（函数（错误）{console.log（错误）}）来处理你的api中的错误;'我很确定你会发现错误更具体？角度总是有这些奇怪的和一般的堆栈痕迹.. –

谢谢卢卡斯，我可以处理这个特殊情况。希望知道是否有办法使角堆栈走线更加符合未来的要求。哦，好吧.. – eugenekr

角度巨大的堆栈跟踪

回答

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