Scenario: Read data from a CSV file with unknown number of records. Use the data to create Soap XML MSg and Post Method. Continue to do this until all the records have been read.

Problem: I used ReadyAPI to perform these actions and was able to achieve the intended TPS at server with whatever i have provided in VU's option. Tried with 150 vu's and observed constant load of 150 requests at the server. But when i try to do the same in JMeter, i was not able to achieve more than 70 TPS and the load isn't evenly distributed as well no matter how many threads i use. I am using a Thread Group, CSV DataSet Config, UserDefined Parameters to create unique request ID and JSR223 PreProcessor with Groovy Script as a child of HTTPRequest to remove empty xml tags.

Read some posts where it was mentioned that JMeter throughput will be stagnant based on servers response capability. But it's not in my case since i can generate 150TPS with ReadyAPI. Annual Licensing costs and Renewal costs associated with ReadyAPI is the Reason that i am looking for solution with JMeter.

I am facing the below issue -

Environment Chrome version - Version 86.0.4240.75 (Official Build) (64-bit) chrome driver - ChromeDriver 86.0.4240.22 (downloaded from https://chromedriver.chromium.org/downloads) python 3.6.6 32 bit selenium - 3.141.0 ExpressVPN connected Windows 10 Pro 64 bit system

Code

from selenium.webdriver.chrome.options import Options
from selenium import webdriver
driver = webdriver.Chrome(options=options, executable_path='D:/chromedriver_win32/chromedriver.exe')

Execution output

D:\Assignment>python add_to_cart_v3.py

DevTools listening on ws://127.0.0.1:59948/devtools/browser/b3bea32b-25a1-47ff-800c-162e0200566a
Traceback (most recent call last):
  File "add_to_cart_v3.py", line 67, in <module>
    driver = webdriver.Chrome(options=options, executable_path=r'D:/chromedriver_win32/chromedriver.exe')
  File "C:\Users\pc\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 81, in __init__
    desired_capabilities=desired_capabilities)
  File "C:\Users\pc\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "C:\Users\pc\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "C:\Users\pc\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Users\pc\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: chrome not reachable

When I disconnect the Express VPN, it works fine. Please share your inputs about what could be the issue here.