ANR When Camera Stopped

[cyodrew]

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Description

I'm getting some reports in Crashlytics of ANRs when stopCapture is called on Camera2Capturer, usually when the local video track is released during the onPause lifecycle event.

Steps to Reproduce

1. Have the app call onPause either due to placing the app in the background or finishing the activity
2. This causes the camera track to be released
3. The Camera2Capturer calls stopCapture and blocks the main thread due to the wait call not being notified.

Code

N/A

Expected Behavior

The camera is released and not blocking the main thread.

Actual Behavior

The app gets stuck waiting for the camera to be released.

Reproduces how Often

Not often, but could be due to some sort of race condition. There's been 42 occurrences in the last 90 days of our app.

Logs

// Log output when issue occurs

main (waiting): tid=1 systid=15989 
       at java.lang.Object.wait(Native method)
       at java.lang.Object.wait(Object.java:442)
       at java.lang.Object.wait(Object.java:568)
       at tvi.webrtc.CameraCapturer.stopCapture(CameraCapturer.java:286)
       at tvi.webrtc.Camera2Capturer.stopCapture(Camera2Capturer.java:18)
       at com.twilio.video.Camera2Capturer.stopCapture(Camera2Capturer.java:279)
       ...
       at com.twilio.video.LocalVideoTrack.release(LocalVideoTrack.java:281)

Versions

All relevant version information for issue.

Video Android SDK

7.3.1

Android API

33

Android Device

Mostly Samsung devices (>90%), a few Pixel devices and others

[flipper09112]

Same here!

Some progress?

[afalls-twilio]

@cyodrew @flipper09112 Thank you for the bug report, two questions...

1. Are you using code from the Quickstart?
2. We have fixed many camera issues between 7.3.1 & 7.5.1. Have you tested with latest version?

[cyodrew]

@afalls-twilio I have not been able to produce the issue in the Quickstart but it doesn't happen often in our app either. I will update our app with the latest SDK version and report back here, thanks!

[afalls-twilio]

@cyodrew Thank you for attempting with the QuickStart, is the issue still happening post upgrade?