mvn clean package --add-opens java.base/java.util=ALL-UNNAMED
If you are below 3.6.0, consider upgrading. Install a newer version from maven.apache.org or use your system’s package manager. mvn clean package --add-opens java
These dependencies are marked as <scope>compile</scope> by default, but they won't be bundled into your WAR (unless you have other code using JAXB). They are only needed during the build process. They are only needed during the build process
A developer could build from the terminal but not from Eclipse. The solution was to go to , point Eclipse to an external, fully functional Maven 3.8.6 installation (instead of the embedded one), and update the “Global Settings” file to match. point Eclipse to an external
Historically, this error plagued developers migrating from Java 7 to Java 8, or from older Maven versions to newer ones. Specifically, older versions of the maven-war-plugin (specifically versions prior to 2.4) utilized libraries (such as plexus-io or plexus-archiver ) that had native code dependencies or hard-coded logic that became incompatible with newer JDK versions.
The WebappStructureSerializer error is essentially a module-path compatibility issue. Java evolved, and Maven plugins had to catch up. By adding JAXB dependencies or upgrading your plugin, you'll get past this error quickly.
The most effective fix is to manually specify a modern version of the maven-war-plugin Locate the , add (or update) the following dependency: > < > < >org.apache.maven.plugins < artifactId >maven-war-plugin < Use code with caution. Copied to clipboard Steps to Apply the Change