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From Andrey Pokhilko <>
Subject Re: Concerns about change in JTL writing
Date Wed, 08 Aug 2018 09:16:16 GMT
I tried to use JMeter only like regular user will. I did change through
UI flag in listener, under "Configure" button. I believe the UI is the
"final judge" that overrides any property, plus if I have in my JMX the
flag set to false, it is guaranteed that it will be taken into account.

I looked into code and I see that property default is "true" from many
years ago. This still leaves us with the problem that behavior of CSV
JTL writing does change.

If we change property default, it will change result writing for users
of XML JTL, if we don't - it will change it for users of CSV JTL. JMeter
use CSV JTL as default format, so I'd suggest to change
"" default to false as lesser from two
evils (IMO).


Andrey Pokhilko

08.08.2018 11:56, Philippe Mouawad пишет:
> On Wednesday, August 8, 2018, Andrey Pokhilko <> wrote:
>> Hi,
>> I took the latest snapshot of JMeter and I'm shocked by the change in
>> CSV JTL writing. It is strange that it writes subsamples now with no
>> respect to "Save Sub Results" flag. I simply can't turn new behavior off.
> how did you do that ?
> Through property
> or in a different way , in the latter case how ?
>> It will break all the automated scripts written in the ecosystem. I run
>> the test with Aggregate Report, I see one number. If I save it into CSV
>> JTL and re-load it in Aggregate Report, I see completely different
>> picture. All my response times are counted twice now.
> That would be a bug that we need to fix.
>  The intention of the change was just to respect the
> flag for csv also.
> It was only taken into account  for xml.
>> I believe something really breaking has happened, and it will hurt
>> users. I think CSV JTL writer has to respect the "Save Sub Results" flag
>> and not have that flag enabled by default. Otherwise, we break any
>> automation that were reading CSV JTL assuming only top-level samples are
>> written and math of average response times is consistent.
>> Or maybe I'm just doing something wrong?
>> --
>> Andrey Pokhilko

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