IllegalStateException while accessing DefaultDrmSessionManager builder. #350

Media3 Version

ExoPlayer 2.18.6

Devices that reproduce the issue

Xiaomi Redmi Note 7 running on 11

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Not tested

Reproduction steps

Play any Widevine DRM protected content. Haven't tested other DRM schemes yet.

Expected result

The content should play without any exception thrown since we have not changed anything in our implementation since the last update.

Actual result

Playback does not crash but instead continues with the following stack trace. This actually seems to be intended but we have yet to come up with a reason behind this behavior.

DefaultDrmSessionManager accessed before setPlayer(), possibly on the wrong thread. java.lang.IllegalStateException at com.google.android.exoplayer2.drm.DefaultDrmSessionManager.verifyPlaybackThread(DefaultDrmSessionManager.java:824) at com.google.android.exoplayer2.drm.DefaultDrmSessionManager.prepare(DefaultDrmSessionManager.java:471) at com.google.android.exoplayer2.source.dash.DashMediaSource.prepareSourceInternal(DashMediaSource.java:450) at com.google.android.exoplayer2.source.BaseMediaSource.prepareSource(BaseMediaSource.java:221) at com.google.android.exoplayer2.source.CompositeMediaSource.prepareChildSource(CompositeMediaSource.java:120) at com.google.android.exoplayer2.source.MergingMediaSource.prepareSourceInternal(MergingMediaSource.java:171) at com.google.android.exoplayer2.source.BaseMediaSource.prepareSource(BaseMediaSource.java:221) at com.google.android.exoplayer2.source.CompositeMediaSource.prepareChildSource(CompositeMediaSource.java:120) at com.google.android.exoplayer2.source.WrappingMediaSource.prepareChildSource(WrappingMediaSource.java:212) at com.google.android.exoplayer2.source.MaskingMediaSource.createPeriod(MaskingMediaSource.java:108) at com.google.android.exoplayer2.MediaSourceList.createPeriod(MediaSourceList.java:315) at com.google.android.exoplayer2.MediaPeriodHolder.createMediaPeriod(MediaPeriodHolder.java:433) at com.google.android.exoplayer2.MediaPeriodHolder.<init>(MediaPeriodHolder.java:108) at com.google.android.exoplayer2.MediaPeriodQueue.enqueueNextMediaPeriodHolder(MediaPeriodQueue.java:190) at com.google.android.exoplayer2.ExoPlayerImplInternal.maybeUpdateLoadingPeriod(ExoPlayerImplInternal.java:1999) at com.google.android.exoplayer2.ExoPlayerImplInternal.updatePeriods(ExoPlayerImplInternal.java:1986) at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:974) at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:502) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:223) at android.os.HandlerThread.run(HandlerThread.java:67)

Media

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Bug Report

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