Release Note: Fail Immediately If a GC That Is Unavailable Is Selected

Previously, if an unavailable garbage collector (for example, the G1 garbage collector was not present in "minimal" JVM builds) was selected by the user on the command line, then the JVM would issue a warning and continue execution, by silently selecting one of the available garbage collectors. This behavior has been changed. The JVM will now print an error message and immediately terminate if the user selects an unavailable garbage collector.