RFR: 8279673: AudioClip.play doesn't work due to NullPointerException when creating DataPusher
Phil Race
prr at openjdk.java.net
Wed Jan 19 21:06:58 UTC 2022
On Sun, 14 Nov 2021 20:02:27 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:
> There is possible NPE, when trying to play AudioClip
>
> import java.applet.AudioClip;
> import java.io.IOException;
> import java.net.URL;
>
>
> public class AudioNpe {
> public static void main(String[] args) throws IOException, InterruptedException {
> URL url = new URL("https://file-examples-com.github.io/uploads/2017/11/file_example_WAV_1MG.wav");
> AudioClip content = (AudioClip)url.getContent();
> content.play();
>
> Thread.sleep(10000L);
> }
> }
>
>
> at java.lang.Thread.<init>(Thread.java:393)
> at java.lang.Thread.<init>(Thread.java:760)
> at com.sun.media.sound.JSSecurityManager.createThread(JSSecurityManager.java:115)
> at com.sun.media.sound.DataPusher.start(DataPusher.java:117)
> - locked <0x955> (a com.sun.media.sound.DataPusher)
> at com.sun.media.sound.JavaSoundAudioClip.startImpl(JavaSoundAudioClip.java:202)
> - locked <0x95e> (a com.sun.media.sound.JavaSoundAudioClip)
> at com.sun.media.sound.JavaSoundAudioClip.play(JavaSoundAudioClip.java:152)
> at main.java.AudioNpe.main(AudioNpe.java:12)
>
>
> It happens because of bug in `com.sun.media.sound.JSSecurityManager#createThread` implementation: variable `String name`, which supposed to be used - actually unused and `null` thread name is passed to `Thread` constructor.
>
> After fix - audio clip plays without problems.
Marked as reviewed by prr (Reviewer).
-------------
PR: https://git.openjdk.java.net/jdk/pull/6382
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