Hi Sushma,
Most likely, your Studio Pro instance crashed before (without restarting your machine). If so, another instance might be running. Otherwise, you could be using another (Mendix) app locally at the same time as well. If you want to do this, you need to select a different port for each app.
When you only have one Studio Pro instance running, but there are more OpenJDK processes running; it's likely that something is still running in te background. A device restart is the cleanest option then (or killing a process manually).
In order to use more than one app, you can change the port via the ‘Settings’.
Hopefully, this helps.
Hi Sushma,
It looks like the port you are trying to use is already in used by Mendix or another program. Try changing the port with the following steps:
Hope this helps!