java.util.ConcurrentModificationException at java.util.ArrayList$Itr.next(ArrayList.java:860) at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2184) [236538905]

Fixed

Bug

Status Update

No update yet.

Description

be...@gmail.com

created issue #1

Jun 20, 2022 06:59PM

Component used: Fragment

Version used:
dependencies {
...
implementation 'androidx.appcompat:appcompat:1.4.2'
...

Devices/Android versions reproduced on: Samsung Galaxy Note 10 / Android 12

This is a problem in androidx library:

--------- beginning of crash
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: FATAL EXCEPTION: main
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: Process: sk.alteris.app.kalendarsk, PID: 6643
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: java.util.ConcurrentModificationException
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at java.util.ArrayList$Itr.next(ArrayList.java:860)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2184)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1971)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:311)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.fragment.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:274)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1244)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1092)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.viewpager.widget.ViewPager.onMeasure(ViewPager.java:1622)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.measureVertical(LinearLayout.java:995)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.FrameLayout.onMeasure(FrameLayout.java:197)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:145)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:496)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.FrameLayout.onMeasure(FrameLayout.java:197)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7980)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.widget.FrameLayout.onMeasure(FrameLayout.java:197)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at com.android.internal.policy.DecorView.onMeasure(DecorView.java:1277)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.View.measure(View.java:27129)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:4528)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:3220)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3525)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2911)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10458)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1108)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.Choreographer.doCallbacks(Choreographer.java:866)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.Choreographer.doFrame(Choreographer.java:797)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1092)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:938)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.os.Looper.loopOnce(Looper.java:226)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.os.Looper.loop(Looper.java:313)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:8663)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:567)
06-20 19:51:20.465 10283 6643 6643 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135)
06-20 19:51:20.465 10227 7726 7726 I HWRResConfig: [setPreloadRootDirectoryPath] mPreloadRootDirPath is set with /product/HWRDB/
06-20 19:51:20.467 1000 966 1340 D SyncManager: userId - 0 auto - true
06-20 19:51:20.469 1000 966 1544 D Debug : low && ship && 3rdparty app crash, do not dump
06-20 19:51:20.469 1000 966 1544 W ActivityManager: crash : sk.alteris.app.kalendarsk,10283

Comments

il...@google.com <il...@google.com> #2Jun 21, 2022 03:36PM

It could easy to reproduce when turning on "Don't keep activities".

be...@gmail.com <be...@gmail.com> #3Jun 21, 2022 05:53PM

Project: platform/frameworks/support
Branch: androidx-master-dev

commit ba0c19707915ff87d9cac2089fcd166bb5cca17d
Author: Ian Lake <ilake@google.com>
Date: Wed Nov 14 16:20:28 2018

Set the correct FragmentManager on active Fragments

All active Fragments should have the correct
FragmentManager set instead of always using the
Activity's FragmentManager.

While added Fragments have their FragmentManager
set correctly in moveToState(), active Fragments
weren't being set correctly, causing issues when
attempting to save the state of the FragmentManager.

Test: new FragmentLifecycleTest
BUG: 119256498
Change-Id: I830f729d93f00859509a0844fae19752342e6ccc

M fragment/src/androidTest/java/androidx/fragment/app/FragmentLifecycleTest.java
M fragment/src/main/java/androidx/fragment/app/FragmentManagerImpl.java
M fragment/src/main/java/androidx/fragment/app/FragmentState.java

https://android-review.googlesource.com/826954

https://goto.google.com/android-sha1/ba0c19707915ff87d9cac2089fcd166bb5cca17d

il...@google.com <il...@google.com> #4Jun 21, 2022 05:58PM

Thanks Ian! Looking forward to a new alpha release ASAP rather than monthly release.😅

be...@gmail.com <be...@gmail.com> #5Jun 21, 2022 06:35PM

Thanks for fixing this!

be...@gmail.com <be...@gmail.com> #6Jul 5, 2022 03:56PM

Wondering is there any release plan?

App Widgets Demo1.zip

150 KB

Download

be...@gmail.com <be...@gmail.com> #7Jul 5, 2022 04:10PM

Fragments 1.1.0-alpha02 is out now with this fix.

il...@google.com <il...@google.com> Jul 13, 2022 11:19PM

Assigned to jb...@google.com.

to...@gmail.com <to...@gmail.com> #8Aug 23, 2022 05:11PM

Does Preferences also depend on Fragments? In which case when will that be updated to 1.1.0-alpha02? Or is the recommended practice to specify both Preferences and Fragments in build.gradle so that we can force Fragments 1.1.0-alpha02?

be...@gmail.com <be...@gmail.com> #9Aug 23, 2022 07:08PM

Re #8 - yes, if you need a specific version of Fragments, you should specify both Preferences and Fragments in your build.gradle.

The release schedule of AndroidX components is completely independent of one another, so Preferences will only get a new version when there's something new to release in Preferences.

jb...@google.com <jb...@google.com> #10Sep 22, 2022 05:21PM

So, in general it sounds like if an androidx dependency (such as preference) is added to build.gradle, then any dependencies of that (e.g. fragment) should also be explicitly added so that the specific version can be specified. Is that right?

In other words, when we explicitly include preference-1.1.0-alpha01 we need to be aware that the fragment-alpha1.1.0-alpha01 is automatically being brought in and so might affect the fragment behaviour. Sorry, I know this is rather OT.

ap...@google.com <ap...@google.com> #11Mar 21, 2023 09:50PM

Thanks, fix confirmed

jb...@google.com <jb...@google.com> #12Mar 21, 2023 10:04PM

Marked as fixed.

alpha02 version of fragments didn't fix this for me. Is there another solution?

na...@google.com <na...@google.com> #13Apr 5, 2023 06:27PM

Re #12 - you're most likely hitting

https://issuetracker.google.com/issues/120814739 - a related but separate issue fixed for alpha03

ma...@gmail.com <ma...@gmail.com> #14Aug 25, 2023 09:56PM

Run