首页 > 解决方案 > Firebase Firestore:无法访问 Firestore 后端(仅限 Android)

问题描述

我正在react-native使用Create React Native App. 对于它使用的后端Firebase Firestore。该应用程序在 iOS 上运行良好,但在尝试从后端获取数据时在 Android 上失败并出现以下错误(无论是在模拟器上还是在设备上):

22:02:37: [2018-05-22T05:02:33.751Z]  @firebase/firestore:, Firestore (4.10.1): Could not reach Firestore backend.
- node_modules\react-native\Libraries\ReactNative\YellowBox.js:71:16 in error
- node_modules\@firebase\logger\dist\cjs\src\logger.js:97:25 in defaultLogHandler
- ... 18 more stack frames from framework internals

知道可能是什么问题以及如何调试吗?

该错误似乎是通用的,因为还有其他带有相同错误消息的问题。但在这种情况下,它仅适用于 Android。

完整日志和堆栈跟踪:

21:50:51: Warning: Expo version in package.json does not match sdkVersion in manifest.
21:50:51:
21:50:51: If there is an issue running your project, please run `npm install` in C:\Users\grigor\Documents\Bitbucket\AwesomeProject and restart.
21:51:08: Finished building JavaScript bundle in 26098ms
21:51:14: Running app on XT1053 in development mode

21:51:34: [2018-05-25T04:51:26.597Z]  @firebase/firestore:, Firestore (4.10.1): Could not reach Firestore backend.
- node_modules\react-native\Libraries\ReactNative\YellowBox.js:71:16 in error
- node_modules\@firebase\logger\dist\cjs\src\logger.js:97:25 in defaultLogHandler
- ... 18 more stack frames from framework internals
21:51:37: Setting a timer for a long period of time, i.e. multiple minutes, is a performance and correctness issue on Android as it keeps the timer module awake, and timers can only be called when the app is in the foreground. See https://github.com/facebook/react-native/issues/12981 for more info.
(Saw setTimeout with duration 3299464ms)
- node_modules\react-native\Libraries\ReactNative\YellowBox.js:82:15 in warn
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:254:8 in setTimeout
- node_modules\@firebase\auth\dist\auth.js:37:577 in Hc
* null:null in <unknown>
- node_modules\@firebase\auth\dist\auth.js:15:932 in y
- node_modules\@firebase\auth\dist\auth.js:37:606 in Ic
- node_modules\@firebase\auth\dist\auth.js:210:0 in kk
- node_modules\@firebase\auth\dist\auth.js:209:665 in start
- node_modules\@firebase\auth\dist\auth.js:215:38 in Dk
- node_modules\@firebase\auth\dist\auth.js:253:425 in ql
- node_modules\@firebase\auth\dist\auth.js:255:146 in <unknown>
- node_modules\@firebase\auth\dist\auth.js:19:220 in <unknown>
* null:null in Gb
* null:null in Cb
- node_modules\@firebase\auth\dist\auth.js:22:103 in Sb
- node_modules\@firebase\auth\dist\auth.js:15:643 in jb
- ... 10 more stack frames from framework internals

标签: androidfirebasereact-nativegoogle-cloud-firestorecreate-react-native-app

解决方案


我没有针对该问题的确切解决方案,但我意识到我与之交互的方式firebase使我的应用程序更容易受到影响。也许你能在你的项目中发现我自己的一些设计缺陷?

我发现我是initializeApp在 a 之外调用的try/catch,这意味着只要遇到错误,整个 JavaScript 模块就会失败。因此,第一个解决方法是安全地正确处理初始化。

其次,这个错误在我构建对firestore(). 例如,我的第一次调用firebase.firestore()嵌入在返回 a 的方法中Promise,即:

() => firebase.firestore().collection('someCollection').get().then(...).catch(e => ...);

firestore现在,使用这种方法,如果在返回a 之前与 failed的交互Promise,我们实际上不会catch出错!这是因为它在链中出现得太早Promise而无法创建。这再次意味着,应用程序似乎会在比应用程序内部捕获的东西更深的层面上失败。但这是错误的!

正确的实现是将交互包装firebase.firestore()Promise第一个:

return new Promise(resolve => firebase.firestore().collection(...)).then(q => ...).catch(e =>...);

希望这在某种程度上有所帮助。我知道这是一个棘手的问题!


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