Polly 重试策略使其阻止或等待成功

问：

我有以下 polly 重试策略：

var retry = new ResiliencePipelineBuilder();
retry.AddRetry(new RetryStrategyOptions
{
    BackoffType = DelayBackoffType.Exponential,
    UseJitter = true, // Adds a random factor to the delay
    MaxRetryAttempts = int.MaxValue,
    Delay = TimeSpan.FromSeconds(1),
    MaxDelay = TimeSpan.FromSeconds(15),
    OnRetry = args =>
    {
        _logger.LogWarning($"Mqtt Reconnecting Attempt: {args.AttemptNumber} with delay {args.RetryDelay}ms.");
        return default;
    }
});

//Build the policy
_retryPolicy = retry.Build();

然后我像这样使用它：

private async Task ReConnectAsync()
{
    try
    {
        //Check if we are not already re-connecting
        if (_isReconnecting) return;
        _isReconnecting = true;
        // Polly retry
        await _retryPolicy.ExecuteAsync(async x => await ConnectToMqttAsync());
    }
    catch (Exception exception)
    {
        _logger.LogError(exception, "failed to retry connecting to mqtt.");
    }
    finally
    {
        _isReconnecting = false;
    }
}

现在我的问题是我正在等待呼叫，但它没有阻止或等待，它似乎触发了一个执行重试的后台任务。我的问题是现在我有多个 Polly 忙于重试的实例。

如何让它阻止/等待重试策略成功或失败？