while running the joget web console project, that i build from the community version, i have the below info messages

[info] jar is unsigned.
[debug] jarsigner executable=[C:\Program Files\Java\jdk1.8.0_131\jre\..\bin\jarsigner.exe]
[debug] Executing: cmd.exe /X /C '""C:\Program Files\Java\jdk1.8.0_131\jre\..\bin\jarsigner.exe" -verify \trunk\Source_Code\Jo-get\joget-community\wflow-designerweb\target\jnlp\unprocessed_nimrod-laf-1.2.jar"'
[info] 
[info] jar is unsigned.

[info] jar is unsigned.
[debug] jarsigner executable=[C:\Program Files\Java\jdk1.8.0_131\jre\..\bin\jarsigner.exe]
[debug] Executing: cmd.exe /X /C '""C:\Program Files\Java\jdk1.8.0_131\jre\..\bin\jarsigner.exe" -verify \trunk\Source_Code\Jo-get\joget-community\wflow-designerweb\target\jnlp\unprocessed_log4j-1.2.8.jar"'
[info]

what is the effect or problem of the above messages?

also, if i am not open source project, what type of license is required to me to work the joget community version?

or no license at all is required from my app?

thanks in advance