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[2661] Fix BroadcastReceiver ANR at ScreenOffTrigger #2732

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@FranAguilera FranAguilera commented Dec 18, 2024

Resolves #2661

Issue

BroadcastReceiver#onReceive runs by default on the main thread. If onReceive doesn't complete in a timely manner, the system will report an Application Not Responding

We've seen instances of this occurring frequently on internal builds

Solution

NOTE: Kudos to @pyricau for the guidance on adding a delay.

Let the broadcast receiver complete immediately and schedule the executor with an initial delay to avoid issues with the broadcast receiver not completing

Verification

Verified that the the ANR no longer occurs and reporting still completes without issues on one of our main apps (internal release build)

This was heavily tested on internal builds

analysisClient.newJob(JobContext(ScreenOffTrigger::class))
currentJob = job
analysisExecutor.execute {
analysisExecutor.execute {
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If analysisExecutor.execute runs the task quickly enough, there's a chance that we might dump the heap & freeze the VM before the process has had a chance to report back to system_server, right?

Looks to me like if we want to avoid that, we need to execute with a delay instead"?

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Good point. I just updated it with a delayed executor. So far seems to be working as well and ANR is no longer reproducible internally

Add a delayedScheduledExecutorService
Adding delay

Add a delayedScheduledExecutorService

Fix BroadcastReceiver ANR
@FranAguilera FranAguilera requested a review from pyricau December 28, 2024 00:01
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Background ANR at ScreenOffTrigger BroadcastReceiver [leakcanary on release]
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