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Invalid YAML configuration

Reports unresolved and deprecated configuration keys and invalid values in Spring Boot application .yaml configuration files, which can lead to runtime errors.


server: port: invalid # Reports 'Cannot convert 'invalid' to java.lang.Integer'

If a deprecated configuration key has a replacement key, you can apply the 'Use replacement key' quick-fix.


logging: path: ${path} # Reports 'Deprecated configuration property 'logging.path''

After the quick-fix is applied:

logging: file: path: ${path}

If a configuration key is not defined in spring-configuration-metadata.json, you can apply the 'Define configuration key' quick-fix that creates the META-INF/spring-additional-configuration-metadata.json file and defines the necessary key.


new: key: value # Reports 'Cannot resolve configuration property 'new.key''

After the quick-fix is applied, the following is added to META-INF/spring-additional-configuration-metadata.json:

{ "properties": [ { "name": "new.key", "type": "java.lang.String", "description": "Description for new.key." } ] }

Use the Replacement tokens option to define tokens used for value placeholders in configuration files. These tokens are specified in the form beginToken*endToken. Without the *, the token is assumed to be the same for start and end.

For example, the default is @ for both start and end token, which enables you to define placeholders, such as

Values inside the replacement token (@property.key@) will not be highlighted.

Inspection options




Replacement tokens



Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for JVM 2023.3


Spring Boot, 233.SNAPSHOT

Last modified: 13 July 2023