spring-cloud-starter-config causes config bean validation to fail

Spring boot 1.5.2 fails to start because of bean validation errors caused by spring-cloud-config-starter:Camden.SR5.

We have a couple of @ConfigurationProperties in our project - some of properties to be set are coming from a defaults.properties in the classpath and others are overwritten by a config provided by a config server. Since we upgraded to boot:1.5.2 and spring-cloud:Camden.SR5 our app does not start properly anymore because of a bean validation error like the following:

Binding to target com.example.config.MiscConfigInfo@6f6962ba failed:

    Property: misc.kmsToWarning
    Value: null
    Reason: may not be empty

    Property: misc.listener
    Value: null
    Reason: may not be null

Action:

Update your application's configuration

So far so good, the description seems very clear, but it actually is wrong - the configuration is all fine and it works as soon as we remove spring-cloud-config-starter from the classpath.

Here is a very small project demonstrating the issue: https://github.com/imod/spring-config-validation-issue

For now, there only seems one workaround: we have to disable the field validation (remove the annotations on the properties).

[dsyer]

It’s fixed in snapshots (Camden and Dalston). New releases are coming shortly. Probably this change: https://github.com/spring-cloud/spring-cloud-commons/commit/8347c5741c3100a5f941db32f43f5088bb54bad5

[imod]

done: #663