No response for applications using tongyi tts

[zhanaali]

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Provide a description of the help you need

"Upon using Tongyi's TTS to convert text to speech, the application became unresponsive with no abnormalities in the logs. Subsequent requests also elicited no response. System: Windows 11 Python: 3.10"

[dosubot[bot]]

Hey there @zhanaali! Great to see you back 🚀

Based on the information you've provided, there could be several reasons why the application becomes unresponsive when using Tongyi's TTS to convert text to speech. Here are some potential causes:

1. Thread Pool Deadlock or Resource Starvation: If the number of tasks submitted to the executor significantly exceeds the number of available threads (max_workers), it can cause the application to hang, especially if any of the tasks are waiting on I/O operations or other resources that do not complete.

2. Blocking I/O Operations: If these operations block the execution thread without proper asynchronous handling, it can make the application unresponsive. This is particularly critical in the context of Flask applications where the default server is not designed to handle a large number of concurrent requests or long-running I/O operations well.

3. Unhandled Exceptions in Threads: Unhandled exceptions or errors that do not derive from Exception (e.g., SystemExit, KeyboardInterrupt) could potentially cause silent failures or unexpected behavior. This might not directly cause unresponsiveness but could contribute to it by affecting the application's logic flow.

4. Memory Leaks or Resource Exhaustion: If the audio data is large or the conversion is done in large volumes without proper memory management, it could lead to memory leaks or exhaustion of system resources. This can manifest as application unresponsiveness, especially on systems with limited resources.

5. Inefficient Handling of Large Texts: If the text is very large, the overhead of managing many small tasks, along with the concatenation of audio segments, could lead to performance issues, particularly if the reduce operation in _tts_invoke method or the audio segment processing is not optimized.

To diagnose and address the issue, consider the following steps:

• Profiling and Monitoring: Use profiling tools to monitor the application's CPU, memory, and I/O usage to identify bottlenecks.
• Logging and Debugging: Enhance logging within the thread execution and I/O operations to capture more detailed information about the application's behavior and potential points of failure.
• Concurrency Model Review: Review the concurrency model and consider using asynchronous I/O operations (e.g., asyncio) to improve the handling of blocking I/O operations.
• Resource Management: Implement proper resource management strategies, including managing the size of the thread pool, to prevent resource starvation and ensure efficient use of system resources.

Unfortunately, I wasn't able to find the current configuration of the concurrent.futures.ThreadPoolExecutor in the application, specifically the value of max_workers, within the repository. It would be helpful if you could provide this information.

You can find more details about these potential issues in the tts.py file in the repository.

Sources

• api/core/model_runtime/model_providers/tongyi/tts/tts.py

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[zhanaali]

I looked at the code, and it seems to have stopped at this line: "response = dashscope.audio.tts.SpeechSynthesizer.call(model=voice, sample_rate=48000, text=sentence.strip(), format=audio_type)".

[charli117]

I looked at the code, and it seems to have stopped at this line: "response = dashscope.audio.tts.SpeechSynthesizer.call(model=voice, sample_rate=48000, text=sentence.strip(), format=audio_type)".

You have come to the tongyi tts SDK, if no response maybe network inaccessible, please make sure the connectedness of https://dashscope.aliyuncs.com

[charli117]

Also make sure the API dependencies are installed，No exception is found in the multi-environment verification

[zhanaali]

Copying the code and running it independently works fine, but I can't get a response inside dify. It's very strange.

[zhanaali]

There should be no issues with the SDK and the network

[dosubot[bot]]

Hi, @zhanaali,

I'm helping the team manage their backlog and am marking this issue as stale. The issue was reported by you regarding applications becoming unresponsive when using Tongyi's TTS to convert text to speech on a Windows 11 system with Python 3.10. Further discussion in the comments suggested potential causes and steps to diagnose and address the issue, with a focus on network accessibility and API dependencies. However, the issue remains unresolved.

Could you please confirm if this issue is still relevant to the latest version of the repository? If it is, please let me know by commenting on the issue. Otherwise, feel free to close the issue yourself, or the issue will be automatically closed in 7 days.

Thank you for your understanding and cooperation.

Dosu