python selenium网页爬虫多线程并发执行偶尔会报错，请问是什么原因？-灵析社区

公司有个需求需要将动态html保存为pdf文件，准备用python+selenium实现。调用chromedriver的Page.printToPdf命令，在页面加载完成后获取打印的response，最后转为pdf保存。考虑到并发性，用多线程模拟测试发现偶尔会出现报错，单个执行又没问题，不知道啥原因 python 3.9.0 selenium 4.16.0 from selenium import webdriver from selenium.webdriver.chrome.options import Options from selenium.webdriver.chrome.service import Service from selenium.common.exceptions import TimeoutException from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support.expected_conditions import staleness_of from urllib.parse import urlparse import json import base64 import threading import time def test(): webdriver_service = Service(r"D:\work\chromedriver-win64\chromedriver.exe") webdriver_options = Options() webdriver_options.binary_location = r"D:\work\chrome-win64\chrome.exe" webdriver_options.add_argument('--no-sandbox') #webdriver_options.add_argument('--headless') webdriver_options.add_argument('--disable-gpu') webdriver_options.add_argument("--remote-debugging-port=9225") webdriver_options.add_argument("--incognito") #webdriver_options.page_load_strategy = 'eager' #webdriver_options.add_argument('--disable-dev-shm-usage') webdriver_prefs = {} webdriver_options.experimental_options['prefs'] = webdriver_prefs webdriver_prefs['profile.default_content_settings'] = {'images': 2} driver = webdriver.Chrome(options=webdriver_options, service=webdriver_service) print(driver.session_id) driver.get("https://www.baidu.com") driver.quit() if __name__ == '__main__': t1 = threading.Thread(target=test) t2 = threading.Thread(target=test) t3 = threading.Thread(target=test) t1.start() t2.start() t3.start() Exception in thread Thread-2: Traceback (most recent call last): File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python39\lib\threading.py", line 950, in _bootstrap_inner self.run() File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python39\lib\threading.py", line 888, in run self._target(*self._args, **self._kwargs) File "C:\Users\Lenovo\Desktop\canon\pythonProject\http\convert_html.py", line 104, in test raise e File "C:\Users\Lenovo\Desktop\canon\pythonProject\http\convert_html.py", line 102, in test driver = webdriver.Chrome(options=webdriver_options, service=webdriver_service) File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 45, in __init__ super().__init__( File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\chromium\webdriver.py", line 61, in __init__ super().__init__(command_executor=executor, options=options) File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 209, in __init__ self.start_session(capabilities) File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 293, in start_session response = self.execute(Command.NEW_SESSION, caps)["value"] File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 348, in execute self.error_handler.check_response(response) File "C:\Users\Lenovo\Desktop\canon\pythonProject\.venv\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 229, in check_response raise exception_class(message, screen, stacktrace) selenium.common.exceptions.WebDriverException: Message: disconnected: Unable to receive message from renderer (failed to check if window was closed: disconnected: not connected to DevTools) (Session info: chrome=120.0.6099.71) Stacktrace: GetHandleVerifier [0x00007FF6341E4D02+56194] (No symbol) [0x00007FF6341504B2] (No symbol) [0x00007FF633FF76AA] (No symbol) [0x00007FF633FE0839] (No symbol) [0x00007FF633FE06EB] (No symbol) [0x00007FF633FDEE3D] (No symbol) [0x00007FF633FDF603] (No symbol) [0x00007FF633FDE026] (No symbol) [0x00007FF633FEEC0F] (No symbol) [0x00007FF633FE02A8] (No symbol) [0x00007FF633FDEE3D] (No symbol) [0x00007FF633FDF603] (No symbol) [0x00007FF633FDE026] (No symbol) [0x00007FF633FE8394] (No symbol) [0x00007FF633FE02A8] (No symbol) [0x00007FF633FDEE3D] (No symbol) [0x00007FF633FDF603] (No symbol) [0x00007FF633FDE026] (No symbol) [0x00007FF633FE55B2] (No symbol) [0x00007FF633FE02A8] (No symbol) [0x00007FF633FDEE3D] (No symbol) [0x00007FF633FDF603] (No symbol) [0x00007FF633FDE026] (No symbol) [0x00007FF633FD5EEA] (No symbol) [0x00007FF633FDD62D] (No symbol) [0x00007FF633FDD1DF] (No symbol) [0x00007FF633FF9931] (No symbol) [0x00007FF633FD040E] (No symbol) [0x00007FF633FCFCAC] (No symbol) [0x00007FF634070A1C] (No symbol) [0x00007FF634065C23] (No symbol) [0x00007FF634034A45] (No symbol) [0x00007FF634035AD4] GetHandleVerifier [0x00007FF63455D5BB+3695675] GetHandleVerifier [0x00007FF6345B6197+4059159] GetHandleVerifier [0x00007FF6345ADF63+4025827] GetHandleVerifier [0x00007FF63427F029+687785] (No symbol) [0x00007FF63415B508] (No symbol) [0x00007FF634157564] (No symbol) [0x00007FF6341576E9] (No symbol) [0x00007FF634148094] BaseThreadInitThunk [0x00007FF97B5E7C24+20] RtlUserThreadStart [0x00007FF97C3CD4D1+33]