How to make sure HTTP Request completed then proceed to next request using JMeter

Question

Recently I'm new to JMeter, I have 9 HTTP requests and I want to make sure all the threads must run accordingly in order to complete the whole task in my project. Moreover, I do not think, that adding a synchronizing timer is the best answer to suit in my scenario. Right now I have 100 threads, ramp-up period is 1 second, forever loop until 10 mins. The problem occurs like this:

HTTP request 1
HTTP request 2
HTTP request 3
HTTP request 5 <--- Must complete HTTP request 4 first. otherwise got problems in my system.
HTTP request 4 
HTTP request 6
HTTP request 7
HTTP request 8
HTTP request 9

HTTP request 4 might take sometimes, because that step is actually registration part.

What I want to achieve HTTP request 1 - 9 accordingly. So that my system will register the user correctly.

I hope, that my explanation can give you more clearer image.

Answer 1

JMeter runs Samplers upside down (or according to Logic Controllers) to wit given the following Test Plan:

Each JMeter thread will always execute Request 1 first and then Request 2

When you have > 1 thread (virtual user) you may see that request order is broken, however if you add __threadNum() function as the request prefix/postfix you will see that actually each thread executes samplers in the order they appear in the Test Plan:

If you experience issues with number of threads > 1 it indicates a problem with your test plan, i.e. you forgot to add HTTP Cookie Manager or the clash is due to missing or improperly working correlation (handling of dynamic parameters)

Answer 2

Could you rename your requests by adding "Thread ${__threadNum}" prefix to your "Request 1", "Request 2", etc so they will look like etc into "Thread ${__threadNum} Request 1", "Thread ${__threadNum} Request 2", etc.

After that, run test and show the sequence of requests please.