Caused by java.lang.NullPointerException: java.io.File.<init> (File.java:262)

[andrepcg]

Description

React native app on Android fails to restart after an update, crashing.

Reproduction

Running a release version of an app, issuing a code push update makes device crash when applying the update.

Exception java.lang.RuntimeException: An error occurred while executing doInBackground()
android.os.AsyncTask$3.done (AsyncTask.java:318)
java.util.concurrent.FutureTask.finishCompletion (FutureTask.java:354)
java.util.concurrent.FutureTask.setException (FutureTask.java:223)
java.util.concurrent.FutureTask.run (FutureTask.java:242)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1133)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:607)
java.lang.Thread.run (Thread.java:762)
arrow_drop_down
Caused by java.lang.NullPointerException:
java.io.File.<init> (File.java:262)
com.microsoft.codepush.react.FileUtils.copyDirectoryContents (FileUtils.java:19)
com.microsoft.codepush.react.CodePushUpdateUtils.copyNecessaryFilesFromCurrentPackage (CodePushUpdateUtils.java:71)
com.microsoft.codepush.react.CodePushUpdateManager.downloadPackage (CodePushUpdateManager.java:226)
com.microsoft.codepush.react.CodePushNativeModule$3.doInBackground (CodePushNativeModule.java:230)
com.microsoft.codepush.react.CodePushNativeModule$3.doInBackground (CodePushNativeModule.java:224)
android.os.AsyncTask$2.call (AsyncTask.java:304)
java.util.concurrent.FutureTask.run (FutureTask.java:237)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1133)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:607)
java.lang.Thread.run (Thread.java:762)

Additional Information

• react-native-code-push version: 3.0.0-beta
• react-native version: 0.45.1
• iOS/Android/Windows version: Android 7.0
• Does this reproduce on a debug build or release build? Release
• Does this reproduce on a simulator, or only on a physical device? Physical

[sergey-akhalkov]

Hi @andrepcg, I've just tried to reproduce the issue with the following repro steps but with no luck:

1. build this sample app.zip in release mode
2. install it on device
3. release several CodePush updates
4. open app on device, check for updates and install the latest one
5. restart app
6. update is applied with no errors

So could you please correct my repro steps or provide me with the minimal version of your app where the issue is reproduces? Also it would be helpful if you could provide me with the command you are using to release new updates and full release history.

[andrepcg]

I found that it doesn't happen everytime. I've had this happen two times in two different builds but cannot find a pattern

[sergey-akhalkov]

Got it, please let me know if any updates, I'll also try to perform other test cases and let you know if any changes.

[youanswer]

Having the similar issue on Android 6.0.1 device.

java.lang.RuntimeException An error occurred while executing doInBackground() 
    AsyncTask.java:309 android.os.AsyncTask$3.done
    FutureTask.java:354 java.util.concurrent.FutureTask.finishCompletion
    FutureTask.java:223 java.util.concurrent.FutureTask.setException
    FutureTask.java:242 java.util.concurrent.FutureTask.run
    ThreadPoolExecutor.java:1113 java.util.concurrent.ThreadPoolExecutor.runWorker
    ThreadPoolExecutor.java:588 java.util.concurrent.ThreadPoolExecutor$Worker.run
    Thread.java:818 java.lang.Thread.run

Caused: java.lang.NullPointerException Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference 
    File.java:183 java.io.File.fixSlashes
    File.java:130 java.io.File.<init>
    FileUtils.java:19 com.microsoft.codepush.react.FileUtils.copyDirectoryContents
    CodePushUpdateUtils.java:71 com.microsoft.codepush.react.CodePushUpdateUtils.copyNecessaryFilesFromCurrentPackage
    CodePushUpdateManager.java:226 com.microsoft.codepush.react.CodePushUpdateManager.downloadPackage
    CodePushNativeModule.java:230 com.microsoft.codepush.react.CodePushNativeModule$3.doInBackground
    CodePushNativeModule.java:224 com.microsoft.codepush.react.CodePushNativeModule$3.doInBackground
    AsyncTask.java:295 android.os.AsyncTask$2.call
    FutureTask.java:237 java.util.concurrent.FutureTask.run
    ThreadPoolExecutor.java:1113 java.util.concurrent.ThreadPoolExecutor.runWorker
    ThreadPoolExecutor.java:588 java.util.concurrent.ThreadPoolExecutor$Worker.run
    Thread.java:818 java.lang.Thread.run

[sergey-akhalkov]

Hey guys @andrepcg, @youanswer, @pinqy520, thanks for reaching us. Currently, we are trying to reproduce the issue and figure out why currentPackageFolderPath variable is null. In case we won't find the root cause of the issue, we'll implement workaround that will help us to avoid the issue - in case getCurrentPackageFolderPath() returns null, we are going to ask server for full package instead of diff, so we are going to avoid this condition and update should be applied without any exceptions.

Thanks for your patience and let me know if you have any questions or considerations.

[sergey-akhalkov]

Hey guys, could you please perform codePush.getCurrentPackage() method before codePush.sync and share us with its output (I mean share it in case when the issue reproduces)? This check relates to currentPackageFolderPath variable I've talked above and it could help us to investigate the issue.

[pinqy520]

@sergey-akhalkov i performed codePush.getCurrentPackage() method, and it returns null before the app crashes.

code:

(codePush as any).getCurrentPackage().then((r: any) => {
    fetch('http://faceparty.la/tt=' + JSON.stringify(r)) // send log to server
})
codePush.sync()

[sergey-akhalkov]

Hey guys @andrepcg, @youanswer, @pinqy520, @rj12info, could you please insert if (Platform.OS === "ios" && config.packageHash) { line in your node_modules/react-native-code-push/CodePush.js file instead of if (config.packageHash) {, rebuild your apk with this changes, release an update and let me know if the issue is still reproduces?

[didiercapozzi]

@sergey-akhalkov I can confirm you that your solution with if (Platform.OS === "ios" && config.packageHash) { worked fine for me.