Some applications need to launch new Java processes, but the javapackager tool only embeds a striped down version of the JRE that doesn't include the standard 'java' launcher. Applications expecting to be able to find this executable in the JRE folder will fail.

There should be some mechanism by which the javapackager could include the bin folder or parts of it in the embedded JRE. Due to various packaging steps (including code signing, generating installers, disk images, etc.) it is awkward to shoehorn the java command into the embedded JRE after the fact.