"add var" appears in server console while task query execution

I was querying for historic task/variables/process instances via Rest API (POST method). I was passing JSON body as request payload.

And i was able to see the content “add var” repeatedly printing in server console and log.

add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var
add var

What is the issue?

Which Camunda version is this?

springBootVersion = ‘2.0.2.RELEASE’
camundaBPMStarterVersion= ‘3.0.0’
camunda 7.9

I was not able to reproduce it.
What is your spring boot setup - only Rest or Rest + webapps?

Rest + webapps(cockpit/admin/tasklist)

I was not able to reproduce it.
Could you please share an example which reproduce the issue.