Version 4.2 was tested and certified with JDK versions 1.7.0_80 and earlier.
Some Companies allow Oracle Java to automatically upgrade the system JDK. Once JDK 1.8.0_xx is downloaded and installed Process Automation stops working with version 4.2.x.
Process Automation version 4.3 is certified with JDK 1.8.0_xx.
If using Process Automation 4.2 you will need to use JDK 1.7.0 prior to version 80 . If your company requires JDK 1.8.0 you will need to upgrade to Process Automation version 4.3.x.
Please note - This also applies to the non-public JDK 7 releases, versions 1.7.0_81 or later.