Spring boot yaml property boolean not recognized

I have the following in application.yml:

perscel:
  mail:
    featuretoggle: true

Following field:

@Value("${perscel.mail.featuretoggle}")
private final Boolean isFeatureActive;

results in:

Parameter 7 of constructor in be.cm.apps.press.perscel3.cron.CronJob required a bean of type ‘java.lang.Boolean’ that could not be found.

A bit annoyed by the unexpected issue, clearly the boolean field is set to true.
Note that all other fields under the same namespaces are properly filled in, it is literally only the boolean field that is causing the problem.
I have no additional configuration for reading properties files.

Spring boot starter xparent version 2.4.2

Edit: The AllArgsConstructor is annotated by lombok.
I have the following properties:

@Value("${perscel.mail.featuretoggle}")
private final Boolean isFeatureActive;

@Value("#{'${perscel.mail.recipients.developers}'.split(',')}")
private final List<String> emailRecipientsDevelopers;

@Value("#{'${perscel.mail.recipients.admins}'.split(',')}")
private final List<String> emailRecipientsAdmins;

The two lists properly worked, I only have a problem after adding the boolean value.

Answer

Note that Spring complains on the constructor, not on the field annotation. So, this is basically because of missing @Value annotation on the constructor param in auto-generated code by Lombok.

You basically have 2 options:

1. Remove @AllArgsConstructor (and final field modifier), mark all the bean fields with @Autowired and let Spring set fields for you directly instead of using constructor.
2. Add constructor with all the arguments explicitly, not relying on Lombok auto-generated one. But this time – place @Value annotation on the corresponding constructor param.