IndexOutOfBoundsException in SinglePeriodTimeline.getWindow

[ummerakbar45]

java.lang.IndexOutOfBoundsException:
at com.google.android.exoplayer2.util.Assertions.checkIndex (Assertions.java:68)
at com.google.android.exoplayer2.source.SinglePeriodTimeline.getWindow (SinglePeriodTimeline.java:151)
at com.google.android.exoplayer2.source.ForwardingTimeline.getWindow (ForwardingTimeline.java:62)
at com.google.android.exoplayer2.source.AbstractConcatenatedTimeline.getWindow (AbstractConcatenatedTimeline.java:164)
at com.google.android.exoplayer2.Timeline.getWindow (Timeline.java:633)
at com.google.android.exoplayer2.Timeline.getWindow (Timeline.java:620)
at com.google.android.exoplayer2.ui.PlayerControlView.updateProgress (PlayerControlView.java:731)
at com.google.android.exoplayer2.ui.PlayerControlView.access$000 (PlayerControlView.java:162)
at com.google.android.exoplayer2.ui.PlayerControlView$ComponentListener.onTimelineChanged (PlayerControlView.java:1094)
at com.google.android.exoplayer2.ExoPlayerImpl.updatePlaybackInfo (ExoPlayerImpl.java:659)
at com.google.android.exoplayer2.ExoPlayerImpl.handlePlaybackInfo (ExoPlayerImpl.java:611)
at com.google.android.exoplayer2.ExoPlayerImpl.handleEvent (ExoPlayerImpl.java:557)
at com.google.android.exoplayer2.ExoPlayerImpl$1.handleMessage (ExoPlayerImpl.java:106)
at android.os.Handler.dispatchMessage (Handler.java:102)
at android.os.Looper.loop (Looper.java:154)
at android.app.ActivityThread.main (ActivityThread.java:6119)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:776)

[tonihei]

Most likely, the issue is caused by one of two reasons:

1. You are accessing the player from multiple threads. (see e.g. Allow specifying a Looper when instantiating ExoPlayer #4278). If you switch to the latest 2.9.0 release, you should see warnings in the log if that happens.
2. A bug which happens when removing playlist elements (see e.g. SinglePeriodTimeline.getPeriod assertion fails when manipulating playlist #4871). That is also fixed in 2.9.0.