https://bz.apache.org/bugzilla/show_bug.cgi?id=66139
Bug ID: 66139
Summary: Open Model Thread Group using CSV Data Set Config
Product: JMeter
Version: 5.5
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: HTTP
Assignee: issues@jmeter.apache.org
Reporter: michael.ho...@bentley.com
Target Milestone: JMETER_5.5
Created attachment 38323
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38323&action=edit
Test jmx file
In v5.4.3, using a standard thread group I've been successfully using CSV Data
Set Config with a CSV of 100 users for login/password in my HTTP requests.
I'm now trying v5.5 and the Open Model Thread Group, but the users are not all
being read from the CSV, it seems to skip users out of the list of 100. The
skipping seems random, such as users 1-4 are read then 5 is skipped, then 6-15
are read, but 16-18 are skipped, and so on.
I've also tried the CSV Data Set Config with recycle on end of file, and can
see that if when it does recycle it again skips some users (not the same ones).
So by the end of a test, some users have been used 3 times, some 1, some 5,
etc.
Works fine in v5.5 using a standard thread group, but when I try the Open Model
the behaviour is as above.
I have simplified my test right down to a single request, and removed any
confidential data. In the attached jmx there is a "Thread Group" and a "Open
Model Thread Group". Easiest to see the issue by disabling one of these and
running the test, monitoring the Summary Report. There you can see the label
and the username that is used. "Thread Group" goes through the csv in
sequence, but "Open Model Thread Group" goes through in sequence skipping
random users. I have also attached a test csv file for the usernames.
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