CarAppService memory leak reported by leakcanary [203594731]

Fixed

Bug

Status Update

No update yet.

Description

ky...@mapbox.com

created issue #1

Oct 20, 2021 01:40AM

Android Auto version reproduced on: 1.0.0

Sample project to trigger the issue. hellocar.zip is attached
A bug report https://github.com/square/leakcanary/issues/2191

Copy paste from the leakcanary issue below

I was digging into a leak that I thought was our implementation. But found that a minimal project also receives leaks. It's attached. I'm sharing here because maybe the leakcanary folks recognize this error. I'll share a google issue tracker after posting.

implementation("androidx.car.app:app:1.0.0")
implementation("com.squareup.leakcanary:leakcanary-android:2.7")

Repro steps

open app
run ./desktop_head_unit
close dhu
repeat 2 and 3

LeakTrace information

10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.833 29746 30639 D LeakCanary: HEAP ANALYSIS RESULT
10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.833 29746 30639 D LeakCanary: 1 APPLICATION LEAKS
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: References underlined with "~~~" are likely causes.
10-19 18:23:47.833 29746 30639 D LeakCanary: Learn more at https://squ.re/leaks.
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: 1701 bytes retained by leaking objects
10-19 18:23:47.833 29746 30639 D LeakCanary: Signature: 27a828a15f5634ec1f03e7566ebb7d680ca4d
10-19 18:23:47.833 29746 30639 D LeakCanary: ┬───
10-19 18:23:47.833 29746 30639 D LeakCanary: │ GC Root: Global variable in native code
10-19 18:23:47.833 29746 30639 D LeakCanary: │
10-19 18:23:47.833 29746 30639 D LeakCanary: ├─ androidx.car.app.CarAppService$1 instance
10-19 18:23:47.833 29746 30639 D LeakCanary: │    Leaking: UNKNOWN
10-19 18:23:47.833 29746 30639 D LeakCanary: │    Retaining 528 B in 1 objects
10-19 18:23:47.833 29746 30639 D LeakCanary: │    Anonymous subclass of androidx.car.app.ICarApp$Stub
10-19 18:23:47.833 29746 30639 D LeakCanary: │    this$0 instance of com.mapbox.example.hellocar.MainCarAppService
10-19 18:23:47.833 29746 30639 D LeakCanary: │    ↓ CarAppService$1.this$0
10-19 18:23:47.833 29746 30639 D LeakCanary: │                      ~~~~~~
10-19 18:23:47.833 29746 30639 D LeakCanary: ╰→ com.mapbox.example.hellocar.MainCarAppService instance
10-19 18:23:47.833 29746 30639 D LeakCanary:      Leaking: YES (ObjectWatcher was watching this because com.mapbox.example.hellocar.MainCarAppService received
10-19 18:23:47.833 29746 30639 D LeakCanary:      Service#onDestroy() callback and Service not held by ActivityThread)
10-19 18:23:47.833 29746 30639 D LeakCanary:      Retaining 1.7 kB in 23 objects
10-19 18:23:47.833 29746 30639 D LeakCanary:      key = 96cda5f8-8de4-44ef-b1df-641fbc38868f
10-19 18:23:47.833 29746 30639 D LeakCanary:      watchDurationMillis = 349897
10-19 18:23:47.833 29746 30639 D LeakCanary:      retainedDurationMillis = 344896
10-19 18:23:47.833 29746 30639 D LeakCanary:      mApplication instance of android.app.Application
10-19 18:23:47.833 29746 30639 D LeakCanary:      mBase instance of android.app.ContextImpl
10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.833 29746 30639 D LeakCanary: 0 LIBRARY LEAKS
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: A Library Leak is a leak caused by a known bug in 3rd party code that you do not have control over.
10-19 18:23:47.833 29746 30639 D LeakCanary: See https://square.github.io/leakcanary/fundamentals-how-leakcanary-works/#4-categorizing-leaks
10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.833 29746 30639 D LeakCanary: 0 UNREACHABLE OBJECTS
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: An unreachable object is still in memory but LeakCanary could not find a strong reference path
10-19 18:23:47.833 29746 30639 D LeakCanary: from GC roots.
10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.833 29746 30639 D LeakCanary: METADATA
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: Please include this in bug reports and Stack Overflow questions.
10-19 18:23:47.833 29746 30639 D LeakCanary:
10-19 18:23:47.833 29746 30639 D LeakCanary: Build.VERSION.SDK_INT: 30
10-19 18:23:47.833 29746 30639 D LeakCanary: Build.MANUFACTURER: Google
10-19 18:23:47.833 29746 30639 D LeakCanary: LeakCanary version: 2.7
10-19 18:23:47.833 29746 30639 D LeakCanary: App process name: com.mapbox.example.hellocar
10-19 18:23:47.833 29746 30639 D LeakCanary: Stats: LruCache[maxSize=3000,hits=2200,misses=57518,hitRate=3%]
10-19 18:23:47.833 29746 30639 D LeakCanary: RandomAccess[bytes=2808620,reads=57518,travel=25796092554,range=20186019,size=25983967]
10-19 18:23:47.833 29746 30639 D LeakCanary: Heap dump reason: user request
10-19 18:23:47.833 29746 30639 D LeakCanary: Analysis duration: 2773 ms
10-19 18:23:47.833 29746 30639 D LeakCanary: Heap dump file path: /storage/emulated/0/Download/leakcanary-com.mapbox.example.hellocar/2021-10-19_18-23-43_310.hprof
10-19 18:23:47.833 29746 30639 D LeakCanary: Heap dump timestamp: 1634693027822
10-19 18:23:47.833 29746 30639 D LeakCanary: Heap dump duration: 1328 ms
10-19 18:23:47.833 29746 30639 D LeakCanary: ====================================
10-19 18:23:47.882 29746 29746 D LeakCanary: Watching instance of leakcanary.internal.HeapAnalyzerService (leakcanary.internal.HeapAnalyzerService received Service#onDestroy() callback) with key 26fbb319-5266-4de9-91d0-dd86d03c2918

hellocar.zip

797 KB

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Comments

ky...@mapbox.com <ky...@mapbox.com> #2Oct 20, 2021 09:02PM

Thank you for reporting this issue. For us to further investigate this issue, please provide the following additional information:

Android bug report (to be captured after reproducing the issue)
For steps to capture a bug report, please refer:

https://developer.android.com/studio/debug/bug-report#bugreportdevice

Alternate method
Navigate to “Developer options”, ensure “USB debugging” is enabled, then enable “Bug report shortcut”. Capture bug report by holding the power button and selecting the “Take bug report” option.

Note: Please upload the files to google drive and share the folder to android-bugreport@google.com, then share the link here.

sh...@google.com <sh...@google.com> #3Oct 25, 2021 04:12PM

Assigned to sh...@google.com.

Here it is:

https://drive.google.com/file/d/10zNzEMHNZ05od-wBJMCjYwzGkGVr3Fq7/view?usp=sharing

sh...@google.com <sh...@google.com> Jan 4, 2022 06:26PM

Accepted by sh...@google.com.

ap...@google.com <ap...@google.com> #4Jan 6, 2022 06:20AM

Experiencing the same, in most apps but these ones seem more pronounced:

Reddit
Chrome
Play store
Google news screen

Happens when there is a lot of text and images loading while scrolling, in some apps it seems like an optimization issue.

sh...@google.com <sh...@google.com> #5Jan 6, 2022 11:27PM

Marked as fixed.

Im also having the same problem.. reddit its the worst.

ma...@gmail.com <ma...@gmail.com> #6Oct 4, 2022 08:57PM

Oftentimes when my finger is moving down, pressing along the very edge, trying to scroll down, a mad demon will take over and it will rapid scroll up.