当回答过长时，代理服务器自动关闭连接，日志错误显示499错误

[BlakrPander]

日志如下：

SCF_FunctionName:OpenAI-Proxy
SCF_Namespace:default
SCF_StartTime:1698287749552
SCF_RequestId:***
SCF_Duration:14312
SCF_Alias:$DEFAULT
SCF_Qualifier:$LATEST
SCF_LogTime:1698287764481804310
SCF_RetryNum:0
SCF_MemUsage:18266024.00
SCF_Level:INFO
SCF_Message:ERROR RequestId: 4280633807e4294e004bc5642e9f0709 Result: {"errorCode":-1,"errorMessage":"Request was canceled by client or apigw timed out earlier than function.","statusCode":499}
SCF_Type:Platform
SCF_StatusCode:499

已经将超时时间修改为900了，但是还是会出现这种错误，使用同样prompts对官方api_base发送时虽然回答时间很长，但不会出现中断现象，请问该如何解决？
测试代码如下：

prompt = "请你用python写一段素数筛"
    response=openai.ChatCompletion.create(
        api_key="sk-***",
        api_base="https://service-***.usw.apigw.tencentcs.com",
        model="gpt-3.5-turbo",
        messages=[
            {"role":"user","content":prompt},
        ]
    )
    answer=response.choices[0].message.content
    print(answer)
    ```