I am using JMeter to load test a Moodle server. However my Regular Expression Extractor seems to lose the session key value.
However, after sending roughly 15 HTTP requests, the variable reverts to its empty value. I have tried disabling the last call that successfully uses this variable, and the two following calls. But with no change.
I also tried creating a second instance of this extractor right before this variable goes null, and it still fails to work.
I am new to JMeter, so any additional information I should look up would be greatly appreciated.