什么是区域转弯? [英] What are zone turns?

问题描述

我在angular2应用程序中遇到了以下错误.

I encountered the following error in an angular2 application.

 WARNING: your application is taking longer than 2000 Zone turns.

我的问题:什么是区域转弯"，为什么它在2000以上时会警告我?(我知道我可以更改限制，但是那为什么我要这样做?)

My question: What are 'zone turns', why does it warn me when it is above 2000? (I know I can change the limit, but then, why would I do this?)

推荐答案

此错误是Angular2/Universal产生的.处理区域微任务队列时，在处理了队列中的2000个任务后，仍然有待处理的任务.这可能是由于大量异步工作本身使许多异步任务排队.Angular希望队列最终会变空.

This error is produce by Angular2/Universal. When the zones microtask queue is processed and after processing 2000 tasks from the queue there are still pending tasks. This might be caused by lots of async work that itself enqueues lots of async tasks. Angular expects the queue to eventually become empty.

https://github.com/angular/universal/issues/377#issuecomment-215229702

如果愿意，可以将maxZoneTurns设置为10000

you can set maxZoneTurns to 10000 if you like or higher

产生错误的来源 https://github.com/angular/universal/blob/9508ac03650ca0439192b8ed49ce8f1e57b6be33/modules/universal/src/node/bootloader.ts#L158

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