repeated model downloads and first run hanging

[rishikanthc]

When trying to use the online mode for auto-downloading models, the first time models are downloaded the code gets stuck and doesn't execute even after model downloading is completed.

Here's an example code

fn get_model() -> Result<MutexGuard<'static, SentenceEmbeddingsModel>, Box<dyn Error>> {
    MODEL
        .get_or_try_init(
            || -> Result<Mutex<SentenceEmbeddingsModel>, Box<dyn Error>> {
                let model =
                    SentenceEmbeddingsBuilder::remote(SentenceEmbeddingsModelType::AllMiniLmL6V2)
                        .create_model()?;
                Ok(Mutex::new(model))
            },
        )
        .map_err(|e| Box::<dyn Error>::from(format!("Failed to initialize model: {:?}", e)))?
        .lock()
        .map_err(|e| Box::<dyn Error>::from(format!("Failed to acquire model lock: {:?}", e)))
}

Additionally, I have set the RUSTBERT_CACHE environment variable. I notice that even though models exist in the cache directory, after a few times using it, rust-bert starts downloading the models once again. And when it downloads again it once again gets stuck in it and doesn't execute the inference pipeline..

Any help would be appreciated..