Getting Fragment Navigation Crash

[Biyane]

We use Navigation Component for navigation. It works fine. When we add APM, it gives an error

java.lang.IllegalArgumentException: The fragment "SomeFragment" is unknown to the FragmentNavigator. Please use the navigate() function to add fragments to the FragmentNavigator managed FragmentManager.

What am I missing?

[LikeTheSalad]

Hi @Biyane

I'm not aware of any issues with fragment navigation so far so I'll need more details to try and find the root cause. So if possible I'd like to get the following info:

• Version of the Elastic Agent that you're using.
• Android Gradle plugin version of your project.
• Are you using the Elastic Android agent plugin? Or are you manually installing the agent?
• Version of the fragment navigation component that you're using.

Also, it'd be helpful to get the full stacktrace of the error if possible.

I'll be able to provide a better diagnosis and hopefully solve your issue once I can analyze that information.

[Biyane]

@LikeTheSalad thank you, for the quick response.

It crashes not in every fragment, but in some fragments.

• Version of the Elastic Agent - we have used 0.19.0 and also 0.20.0
• Android Gradle plugin version - 8.1.4
• We use the agent plugin. I also tried manually installing, and the same error

• Fragment Navigation 2.5.3. I've upgraded to 2.7.7. and 2.8.0, didn't help.

  
  ---------------------------- PROCESS STARTED (7004) for package com.myPackge ----------------------------
  2024-09-13 14:30:07.510  7004-7004  AndroidRuntime          com.myPackge               E  FATAL EXCEPTION: main
                                                                                                  Process: com.myPackge, PID: 7004
                                                                                                  java.lang.IllegalArgumentException: The fragment SomeFragment{e594051} (077bd085-edf9-4c2e-8edd-da12b9259fbb id=0x7f0a0957 tag=46a48342-cdea-4c2b-9736-e1098c27f2de) is unknown to the FragmentNavigator. Please use the navigate() function to add fragments to the FragmentNavigator managed FragmentManager.
                                                                                                      at androidx.navigation.fragment.FragmentNavigator$onAttach$2.onBackStackChangeCommitted(FragmentNavigator.kt:199)
                                                                                                      at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1918)
                                                                                                      at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1845)
                                                                                                      at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782)
                                                                                                      at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3042)
                                                                                                      at androidx.fragment.app.FragmentManager.dispatchStart(FragmentManager.java:2959)
                                                                                                      at androidx.fragment.app.Fragment.performStart(Fragment.java:3196)
                                                                                                      at androidx.fragment.app.FragmentStateManager.start(FragmentStateManager.java:628)
                                                                                                      at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:290)
                                                                                                      at androidx.fragment.app.FragmentStore.moveToExpectedState(FragmentStore.java:114)
                                                                                                      at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1455)
                                                                                                      at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3034)
                                                                                                      at androidx.fragment.app.FragmentManager.dispatchStart(FragmentManager.java:2959)
                                                                                                      at androidx.fragment.app.FragmentController.dispatchStart(FragmentController.java:274)
                                                                                                      at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:358)
                                                                                                      at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:251)
                                                                                                      at com.kostynchikoff.core_application.presentation.ui.activities.CoreAuthorizedActivity.onStart(CoreAuthorizedActivity.kt:55)
                                                                                                      at com.alabs.globalfeature.presentation.commonUI.activity.authorized.main.BaseAuthorizedActivity.onStart(BaseAuthorizedActivity.kt:69)
                                                                                                      at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1582)
                                                                                                      at android.app.Activity.performStart(Activity.java:8977)
                                                                                                      at android.app.ActivityThread.handleStartActivity(ActivityThread.java:4198)
                                                                                                      at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:225)
                                                                                                      at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:205)
                                                                                                      at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:177)
                                                                                                      at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:98)
                                                                                                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
                                                                                                      at android.os.Handler.dispatchMessage(Handler.java:106)
                                                                                                      at android.os.Looper.loopOnce(Looper.java:230)
                                                                                                      at android.os.Looper.loop(Looper.java:319)
                                                                                                      at android.app.ActivityThread.main(ActivityThread.java:8893)
                                                                                                      at java.lang.reflect.Method.invoke(Native Method)
                                                                                                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
                                                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
  ---------------------------- PROCESS ENDED (7004) for package com.myPackge ----------------------------

[LikeTheSalad]

Thank you for all those details, @Biyane

I took some time to modify the agent's sample app to try and match the same versions that you shared (except for the Android Gradle plugin one, I'm guessing you meant 8.4?) but unfortunately no luck reproducing it.

Based on what you mentioned here:

It crashes not in every fragment, but in some fragments.

I was curious to know what could be the difference between those fragments. I tried adding the safeargs plugin to navigate from the first fragment to the second one by using the generated navigation actions, just to see if switching from ids to actions would trigger the error, though no luck.

Here's the place where I was focusing on during my tests. If you could identify what could I change there to try and trigger the error, or even better, if you happen to have an example project to reproduce this issue that I could take a look at, it would also help a lot.

Thank you for your patience.