SimpleCache assertion error

Version

Media3 1.8.0

More version details

No response

Devices that reproduce the issue

All

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

I do not have a proper repro as it looks like a race. SimpleCache can throw assertions during source closeQuietly that should not be thrown.

2025-10-01 09:37:12.294 Error ExoPlayer  LoadTask - Unexpected exception loading stream
java.lang.IllegalStateException
	at androidx.media3.common.util.Assertions.checkState(Assertions.java:85)
	at androidx.media3.datasource.cache.SimpleCache.commitFile(SimpleCache.java:409)
	at androidx.media3.datasource.cache.CacheDataSink.closeCurrentOutputStream(CacheDataSink.java:278)
	at androidx.media3.datasource.cache.CacheDataSink.close(CacheDataSink.java:234)
	at androidx.media3.datasource.TeeDataSource.close(TeeDataSource.java:101)
	at androidx.media3.datasource.cache.CacheDataSource.closeCurrentSource(CacheDataSource.java:855)
	at androidx.media3.datasource.cache.CacheDataSource.close(CacheDataSource.java:688)
	at androidx.media3.datasource.StatsDataSource.close(StatsDataSource.java:123)
	at androidx.media3.datasource.DataSourceUtil.closeQuietly(DataSourceUtil.java:87)
	at androidx.media3.exoplayer.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:1160)
	at androidx.media3.exoplayer.upstream.Loader$LoadTask.run(Loader.java:453)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
	at java.lang.Thread.run(Thread.java:1119)

Since the media was properly played already the assertion breaks gapless due to player error.
Usually closeQuietly are meant to drop errors, and so

Expected result

Do not throw errors as it happens while playback was successful.

Actual result

The player send errors triggering side effects.

025-10-01 09:38:47.799 Error ExoPlayer  ExoPlayerImplInternal - Playback error
androidx.media3.exoplayer.ExoPlaybackException: Source error
	at androidx.media3.exoplayer.ExoPlayerImplInternal.handleIoException(ExoPlayerImplInternal.java:926)
	at androidx.media3.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:902)
	at android.os.Handler.dispatchMessage(Handler.java:103)
	at android.os.Looper.loopOnce(Looper.java:257)
	at android.os.Looper.loop(Looper.java:342)
	at android.os.HandlerThread.run(HandlerThread.java:85)
Caused by: androidx.media3.exoplayer.upstream.Loader$UnexpectedLoaderException: Unexpected IllegalStateException
	at androidx.media3.exoplayer.upstream.Loader$LoadTask.run(Loader.java:474)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
	at java.lang.Thread.run(Thread.java:1119)
Caused by: java.lang.IllegalStateException
	at androidx.media3.common.util.Assertions.checkState(Assertions.java:85)
	at androidx.media3.datasource.cache.SimpleCache.commitFile(SimpleCache.java:409)
	at androidx.media3.datasource.cache.CacheDataSink.closeCurrentOutputStream(CacheDataSink.java:278)
	at androidx.media3.datasource.cache.CacheDataSink.close(CacheDataSink.java:234)
	at androidx.media3.datasource.TeeDataSource.close(TeeDataSource.java:101)
	at androidx.media3.datasource.cache.CacheDataSource.closeCurrentSource(CacheDataSource.java:855)
	at androidx.media3.datasource.cache.CacheDataSource.close(CacheDataSource.java:688)
	at androidx.media3.datasource.StatsDataSource.close(StatsDataSource.java:123)
	at androidx.media3.datasource.DataSourceUtil.closeQuietly(DataSourceUtil.java:87)
	at androidx.media3.exoplayer.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:1160)
	at androidx.media3.exoplayer.upstream.Loader$LoadTask.run(Loader.java:453)
	... 3 more

Media

N/A

Bug Report

• You will email the zip file produced by adb bugreport to android-media-github@google.com after filing this issue.