Speechsynthesizer causes JVM crash during finalization (Speech client-sdk for Java)

Question

https://github.com/Azure-Samples/cognitive-services-speech-sdk/issues/2701

As I detailed in the above github issue, there is a reproducible bug in the Java client-sdk for Azure Speech. During Finalization of Speechsynthesizer Instance it can cause a Memory Access Violation, resulting in a full crash of the JVM.

Version of Speech SDK 1.40.0

Platform, Operating System, and Programming Language

OS: Windows Server 2022 und Windows 11 Pro Programming language: Java OpenJDK 11

Answer 1

@Lucas Mikulla I was able to repro this issue at my end and find the cause of this issue.Cause:

The problem with the provided code is that it doesn't wait for the speech synthesis to complete before the synthesizer object is closed. When I tried it, I got this error - java.lang.IllegalStateException: Cannot dispose a synthesizer while async synthesis is running. Await async synthesis to avoid unexpected disposals.

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Fix:

I replaced test.speak("Hello"); with test.speak("Hello").get(); and Speech SDK did not crash anymore.

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Hope this helps. If you have any follow-up questions, please let me know. I would be happy to help.

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