Here’s the exact JMeter setup to create Owners at
http://43.204.220.89:8080/petclinic/owners/new.

Thread Group (your load)

• Users: as needed (e.g., 50/200/1000)
• Ramp-up: e.g., 60s
• Loop: as needed

Config Elements

1. HTTP Request Defaults

• Server Name: 43.204.220.89
• Port: 8080
• Protocol: http

2. HTTP Cookie Manager (enable cookies for session)
3. HTTP Header Manager

• Content-Type: application/x-www-form-urlencoded

4. CSV Data Set Config (to feed random data at scale)

• Filename: owners.csv
• Variable Names: first,last,address,city,phone
• Recycle on EOF: True
• Stop thread on EOF: False
• Example owners.csv line:
  John,Doe,12 Baker Street,London,0700012345

Samplers & Post-Processors

1) GET form page (fetch cookies and optional CSRF)

Sampler: HTTP Request

• Method: GET
• Path: /petclinic/owners/new

Post-Processor (optional, if CSRF is enabled): CSS Selector Extractor

• Name of created variable: csrf
• CSS Selector: input[name=_csrf]
• Attribute: value
  (If you don’t see a hidden _csrf field in the HTML, skip this extractor and the _csrf param below.)

2) POST create owner

Sampler: HTTP Request

• Method: POST
• Path: /petclinic/owners/new
• Parameters (add as form params):
  • firstName = ${first}
  • lastName = ${last}
  • address = ${address}
  • city = ${city}
  • telephone = ${phone}
  • _csrf = ${csrf} (only if extractor above succeeded)

(Alternative body if you prefer raw):
firstName=${first}&lastName=${last}&address=${address}&city=${city}&telephone=${phone}&_csrf=${csrf}

Assertion (to confirm success): Response Assertion

• Contains: Owner Information
  (Petclinic typically redirects to /petclinic/owners/{id} showing that text on success.)

Tips for mass traffic

• Add a Uniform Random Timer (e.g., 300–1200 ms) to better mimic users.
• Scale Thread Group users + loop to hit your target RPS.
• If you see 302 redirects, enable “Follow Redirects” on the POST sampler.

That’s it—this pair of samplers (GET→POST) with CSV data will flood the endpoint with realistic owner-creation requests.

Sample JMeter File and Sample Data

Rajesh Kumar

I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow , and SEO strategies at Wizbrand.

Do you want to learn Quantum Computing?

Please find my social handles as below;

Rajesh Kumar Personal Website
Rajesh Kumar at YOUTUBE
Rajesh Kumar at INSTAGRAM
Rajesh Kumar at X
Rajesh Kumar at FACEBOOK
Rajesh Kumar at LINKEDIN
Rajesh Kumar at WIZBRAND

Rajesh Kumar DailyLogs