Well… you’ve got a journey ahead of you. And keep in mind the current LTS version of SonarQube is actually v7.9 LTS, so maybe set that as your target!
I want to know the End of life for this SonarQube 4.4.1
Since v4.4.1 wasn’t an LTS version of SonarQube, it became end-of-life as soon as a new version was released (v4.5 LTS). So… give or take whatever policy we had the time, it’s been EOL since September 2014!
I want to migrate the this SonarQube 4.4.1 to 6.7.x , For that i required documentation.
To jump between versions of SonarQube you need to upgrade to intermediary LTS versions. This means:
There are a huge number of upgrade notes to read in between as well!
I want to know is there any impact will happened for the application
While I imagine that some foundational stuff is still there… over 5 years of development has pretty massively changed SonarQube. Depending on how important historical information is for you… you may want to consider starting over fresh (and not falling so far behind again!)