RFR: 8301627: System.exit and Runtime.exit debug logging

[Alan Bateman]

On Fri, 10 Feb 2023 20:33:39 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> It can be difficult to find the cause of calls to `java.lang.System.exit(status)` and `Runtime.exit(status)` because the Java runtime exits.
> The status value and stack trace are logged using the System Logger named `java.lang.Runtime` with message level `System.Logger.Level.DEBUG`.

src/java.base/share/classes/java/lang/Shutdown.java line 162:

> 160:      * If the system logger {@code java.lang.Runtime} is enabled for logging level DEBUG/FINE
> 161:      * the stack trace of the call to {@code Runtime.exit()} or {@code System.exit()}
> 162:      * is logged.

Shutdown is not a public class so this impNote won't appear in the APIs docs. Should it move to Runtime.exit and System.exit?  If it moved to a public API then "system logger" could link to System.Logger. Also would it be more correct to say "a system logger named "java.lang.Runtime" is enabled for logging levels DEBUG or FINE"?

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PR: https://git.openjdk.org/jdk/pull/12517