DST Java tzupdater - continued

[John M.]

*Hoping for some more discussion.
Hello, in the readme file for tzupdater can some explain this statement:

"Any executing instances of the JDK/JRE to be operated upon must be stopped
prior to running the TZupdater tool against that installed JDK/JRE on-disk
image."

Is there a daemon to be stopped/started or something else (processes to kill).

Could someone elaborate on the implications of doing the above once its identified what to stop?
Thanks very much,
John