Message10525

This has been a major wish list item for a while on the JVM; but see this in the corresponding JRuby project:

"JRuby doesn't implement fork() on any platform, including those where fork() is available in MRI. This is due to the fact that most JVMs cannot be safely forked."

https://github.com/jruby/jruby/wiki/DifferencesBetweenMriAndJruby#fork-is-not-implemented

For such purposes, Jython should be considered to be much like Python on Windows - no fork available. Subprocess is often, but not always, the same - think of daemonization, inherited file handles, etc.