Restore default JUL root handler on Logback cleanup#50969
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When the JUL-to-SLF4J bridge is installed, the default java.util.logging root ConsoleHandler is removed. When the logging system is cleaned up (for example when an ApplicationFailedEvent is published), the bridge is uninstalled but the ConsoleHandler was not restored, leaving the JUL root logger with no handlers. Anything subsequently logged through JUL, such as a startup failure reported via a JUL-backed commons-logging Log, was then silently discarded. Restore the default ConsoleHandler when uninstalling the bridge so that JUL logging continues to work after cleanup. See spring-projectsgh-50404 Signed-off-by: Rameel Rizvi <rrizvi@alumni.cmu.edu>
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When the JUL-to-SLF4J bridge is installed, the default java.util.logging root ConsoleHandler is removed. When the logging system is cleaned up (for example when an ApplicationFailedEvent is published), the bridge is uninstalled but the ConsoleHandler was not restored, leaving the JUL root logger with no handlers. Anything subsequently logged through JUL, such as a startup failure reported via a JUL-backed commons-logging Log, was then silently discarded.
Restore the default ConsoleHandler when uninstalling the bridge so that JUL logging continues to work after cleanup.
See gh-50404