<Sound Dev> Stream objects not garbage collected?

[Alex Menkov]

It looks like a bug in IcedTea PulseAudio provider implementation.
You can file a bug report at http://icedtea.classpath.org/

regards
Alex

On 15.06.2012 18:14, HAAS Christian wrote:
> Hello there!
> We have been using IcedTea/PulseAudio for some load tests for playing
> audio and came across a memory leak which we are now searching.
> Test setup: Create a Clip object of some arbitrary sound file, play it
> once, then close it – rinse and repeat, many times.
> After a few hours we came across an out of memory exception. Analysing
> the memory dump we found that all Clip objects were still active, with
> the garbage collector root being "JNI Global" for the stream objects
> that each Clip is creating. See attached image showing a selected Clip
> object. The clip itself was kept alive through callback interfaces to
> Stream, but isOpen=false proves that close() was called.
> I then proceeded to go through the code of icedtea6-1.9.13 and came
> across the Stream.java / org_classpath_icedtea_pulseaudio_Stream.c pair.
> The native function for native_pa_stream_new() does the call to
> NewGlobalRef() to keep the Stream object alive – presumably for the
> callbacks. But I didn't find the complementary call to DeleteGlobalRef().
> I'd assume this should be done in native_pa_stream_unref(), as this one
> is the last to be called from PulseAudioDataLine.close() -> Stream.free() .
> How is the stream expected to be released properly? Are we missing
> something or is this leak genuine?
> For now we will modify our code to keep and reuse the Clip objects, but
> it would be good to know the root cause.
> Thanks and kind regards,
> ch
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