Process automatically exiting after starting in Process builder

[avigator003]

I am trying to have the multiprocessing functionality . When I try to run a browser or any exe-based command, that process automatically exits whereas my java jar is running and only exits when I close them. Below is my sample code using

process = processbuilder.start(launchCommand); CompletableFuture<Process> onProcessExit = process.onExit(); onProcessExit.then(ph -> functiontocallAfterClose();