7 个用户线程的 Jmeter 并发问题

Question

I have 1 thread Group, Within that I have 5 HTTP Request calls. 1st HTTP Request returns a value & that value is used in rest 4 HTTP Requests. The Thread Group Set Up with Number of Thread (Users): 7 & Ramp-Up period: 5 & Loop Count: infinite. When I run the thread group it breaks due to concurrency.

Example:

When User Thread 1 executes -> Request 1,

Thread 2 executes -> Request 2 (It expects a value from Request 1, Which has not happened for thread 2, Hence it breaks).

Please find the Jmeter SetUp Images below,

Thread

HttpCookieManager

I am new to Jmeter please help me in this.

Answer 1

1. Each JMeter thread (virtual user) executes Samplers upside down (or according to the Logic Controllers
2. JMeter Variables are local for the thread (virtual user)

So there is no option that Thread 1 executes Sampler 1 and Thread 2 executes Sampler 2, all users will be executing all Samplers sequentially, it can be checked using__threadNum() function :

So my expectation is that either your extractor fails or Sampler 1 execution by Thread 2 fails somewhere somehow, check the requests and responses using View Results Tree listener, the JMeter Variables using Debug Sampler and jmeter.log file for any suspicious entries.