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spring-boot/documentation/spring-boot-docs
Hyunwoo Jung a86aa43303 Allow properties migrator to fail application startup
Add a new configuration property to prevent the application from
starting when configuration keys that need to be migrated are
found.

With `on-error`, the application fails when keys that are no longer
supported are found. With `on-warning`, it also fails when keys that
have been renamed are found. The default, `never`, keeps the current
behavior of only logging the report.

See gh-51855

Signed-off-by: Hyunwoo Jung <hyunwoojung@kakao.com>
2026-09-25 20:23:53 -07:00
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