NoClassDefFoundError: commons-io/IOUtils at startup #394
Description
Description of the bug
The application fails at startup with NoClassDefFoundError: org/apache/commons/io/IOUtils because the exampledata dependency has commons-io excluded in pom.xml, but exampledata (via FileCache) requires it at runtime.
This was previously provided transitively, but with Spring Boot 4.x it no longer arrives transitively.
The same issue was fixed in ce-demo (vaadin/ce-demo#154, vaadin/ce-demo#155) by removing the commons-io exclusion.
Expected behavior
The application should start without NoClassDefFoundError.
Fix
Remove the <exclusions> block for commons-io from the exampledata dependency in pom.xml.
Versions
- Vaadin: 25.0.5
- Spring Boot: 4.0.x