To see which version of Java JRE is being used by your MID Server:
Log in to the MID Server host.
Place the following parameter in a suitable place in the <path-to-MID-server>\agent\conf\wrapper-override.conf file.
Save the file.
Restart the MID Server.
The <path-to-MID-server>\agent\wrapper.log file now contains the version, which is displayed after the text "Launching a JVM...".