The JMeter documentation states that the cookie manager should be added at the Thread Group level. However what happens and/or what are the possible side effects of adding it at the Test Plan level? Am I correct in making the assumption all Thread Groups will pick up this global cookie manager and proceed as expected w/ no errors? Is this typically frowned upon? Just looking for a better understanding of how this works in JMeter.
1 Answers
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I've always used HTTP Cookie Manager added at the Test Plan level instead of Test Group one for any performance/load test-scenario WITHOUT any issues.
Here an answer from Jmeter support:
Is it possible to "propagate" cookies through different Thread Groups of the same Test Plan?
No. JMeter threads are intended to represent independent users, so cookies and variables are local to a thread.
If you are really interested in you will get more information by enabling debug for your HTTP Cookie Manager:select Cookie Manager > click Help in jmeter's main menu > click Enable Debug.
So you will find in jmeter.log debug info for Cookie Manager.
