Windows环境Locust高频HTTPS请求后异常停止问题求助

问题现象 #

• 仅Windows系统出现该异常，相同Locust/Python版本、多Locust服务器配置的Linux环境无问题
• 单Locust服务器、5线程（含约100个基于FastHttpUser的HTTPS请求任务）场景会复现；简化为单任务单线程，向同子网服务器发起HTTPS请求仍可复现
• 改为HTTP请求、向公网服务器发起HTTPS请求或在请求间添加等待时间时，程序不会提前停止
• 停止时无报错信息，Locust服务器的CPU和内存状态正常
• 正常复杂测试场景下，约1分钟后停止，仅执行20-50次请求；升级Locust至2.15.1后问题依旧

调试信息 #

关键日志片段 #

[2023-05-31 10:05:18,545] Locust-01/INFO/locust.runners: All users spawned: {"TestTrafficLocust": 1} (1 total users)
[2023-05-31 10:05:18,545] Locust-01/DEBUG/urllib3.connectionpool: Starting new HTTPS connection (1): test.localserver.com:443
[2023-05-31 10:05:20,248] Locust-01/DEBUG/urllib3.connectionpool: https://test.localserver.com:443 "GET /Check.asmx HTTP/1.1" 200 4409
[2023-05-31 10:05:20,248] Locust-01/DEBUG/urllib3.connectionpool: Starting new HTTPS connection (1): test.localserver.com:443
[2023-05-31 10:05:20,280] Locust-01/DEBUG/urllib3.connectionpool: https://test.localserver.com:443 "GET /Check.asmx HTTP/1.1" 200 4409
... 443 repeated calls in 14 seconds ...
[2023-05-31 10:05:34,014] Locust-01/DEBUG/urllib3.connectionpool: Starting new HTTPS connection (1): test.localserver.com:443
[2023-05-31 10:05:34,030] Locust-01/DEBUG/urllib3.connectionpool: https://test.localserver.com:443 "GET /Check.asmx HTTP/1.1" 200 4409
[2023-05-31 10:10:18,602] Locust-01/INFO/locust.runners: Shape test stopping
[2023-05-31 10:10:18,602] Locust-01/DEBUG/locust.runners: Stopping all users

注：最后一次HTTPS请求与Locust关闭间隔超过4分钟

代码调试结果 #

测试代码片段：

print("This is printed")
with client.get(f"https://test.localserver.com/Check.asmx", verify=False, catch_response=True, name="Test_HTTPS_Check") as healthResponse:
        
    if(healthResponse.status_code != 200):
        healthResponse.failure("This is never printed")
        return
    
print("This is not printed")

• 执行到HTTPS请求步骤后停滞，"This is not printed"从未输出
• Wireshark抓包未捕获到该请求，说明请求从未发起
• 调整network_timeout和connection_timeout参数无效（因请求未发起），程序会一直等待至测试时长结束

环境配置 #

• locust：2.12.1（升级至2.15.1后问题依旧）
• Python：3.9.0
• Windows Server 2016 Standard 10.0.14393（VM）
• 内存：2.36 GB
• CPU：Xeon Silver 4116，6核

咨询问题 #

1. @task(1)能否设置超时？
2. 还有哪些方法可避免Locust停止？
3. 在保证测试性能的前提下，添加任务间隔或增加线程是否可行？

内容的提问来源于stack exchange，提问作者Scott