I have to create 1000 users at a time but when I execute test and after creation of 1st user, it gives an error that 'user already exsist' which is true. How can I create 1000 different users with different user names at a time.
Depending on your use case you can consider using:
- __threadNum() function (it returns current JMeter thread number) as a prefix or postfix for username so different virtual users will generate different actual users
- __RandomString() function to generate username out of pseudo-random characters
- __counter() function or Counter test element to generate incrementing number and use it as prefix or postfix