Build Errors

Build failures in QQQ 4.0

Check both java -version and mvn -version: use Java 21 and Maven 3.8 or later. Confirm the BOM is com.kingsrook.qqq:qqq-bom-pom and the selected version is actually published. Use mvn dependency:tree to find mixed QQQ versions, then mvn clean verify to reproduce the build.

A cannot-find-symbol error after upgrading often indicates a removed API or package rename. Follow the 4.0 migration guide. A dependency download failure, missing Testcontainers Docker runtime, and compilation error have different causes; retain the first useful error and fix that cause. Do not bypass checks to make an upgrade appear successful.