Running jmeter to load test vaadin 13 application being return session expired meta

Question

I am trying to run jmeter to load test vaadin13 application following the article here How to perform an Load Test/Performance Test with Vaadin 10 (is it possible with Jmeter?) which is absolutely very helpful. However, i encounter being return for(;;);[{"meta":{"sessionExpired":true}}] for every request which i am clueless.

I check that Vaadin-Security-Key is extracted correctly. Check the request data csrfToken, node is replaced with the value correctly. I am clueless on what i am missing here. Would like to seek advice what else i am missing. Thanks in advance.

Answer 1

您发送的请求负载（数据）是 JSON。我猜您尚未在请求中设置Content-Type标头，并且 Vaadin 无法读取您发送的有效负载，因此无法读取验证会话所需的csrfToken 。

您可以使用HTTP 标头管理器 组件设置标头。如果所有请求都发送 json 数据，您可以在线程组级别添加此组件，如果只有某些请求需要它，您可以将其添加到特定的 HTTP Sampler...

对于 json 类型的请求，content-type header 的值应该是application/json；字符集=UTF-8。

我希望这能解决您面临的问题......