java.io.IOException: mark/reset not supported

The documentation for AudioSystem.getAudioInputStream(InputStream) says:

The implementation of this method may require multiple parsers to examine the stream to determine whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and, if not, reset the stream's read pointer to its original position. If the input stream does not support these operation, this method may fail with an IOException.

Therefore, the stream you provide to this method must support the optional mark/reset functionality. Decorate your resource stream with a BufferedInputStream.

//read audio data from whatever source (file/classloader/etc.)InputStream audioSrc = getClass().getResourceAsStream("mySound.au");//add buffer for mark/reset supportInputStream bufferedIn = new BufferedInputStream(audioSrc);AudioInputStream audioStream = AudioSystem.getAudioInputStream(bufferedIn);

After floundering about for a while and referencing this page many times, I stumbled across this which helped me with my problem. I was initially able to load a wav file, but subsequently only could play it once, because it could not rewind it due to the "mark/reset not supported" error. It was maddening.

The linked code reads an AudioInputStream from a file, then puts the AudioInputStream into a BufferedInputStream, then puts that back into the AudioInputStream like so:

audioInputStream = AudioSystem.getAudioInputStream(new File(filename));BufferedInputStream bufferedInputStream = new BufferedInputStream(audioInputStream);audioInputStream = new AudioInputStream(bufferedInputStream, audioInputStream.getFormat(), audioInputStream.getFrameLength());

And then finally it converts the read data to a PCM encoding:

audioInputStream = convertToPCM(audioInputStream);

With convertToPCM defined as:

private static AudioInputStream convertToPCM(AudioInputStream audioInputStream)    {        AudioFormat m_format = audioInputStream.getFormat();        if ((m_format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) &&            (m_format.getEncoding() != AudioFormat.Encoding.PCM_UNSIGNED))        {            AudioFormat targetFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,                m_format.getSampleRate(), 16,                m_format.getChannels(), m_format.getChannels() * 2,                m_format.getSampleRate(), m_format.isBigEndian());            audioInputStream = AudioSystem.getAudioInputStream(targetFormat, audioInputStream);    }    return audioInputStream;}

I believe they do this because BufferedInputStream handles mark/reset better than audioInputStream. Hope this helps somebody out there.

Just came across this question from someone else with the same problem who referenced it.

Oracle Bug database, #7095006

Use the following code to avoid the InputStream step. It's the InputStream that is causing the error.

URL url = AudioMixer.class.getResource(fileName); AudioInputStream ais =  AudioSystem.getAudioInputStream(url); 

voila - no InputStream

mark/reset exception during getAudioInputStream()