Maven dependency provided on submodule ear throws ClassNotFoundException - maven

Question

Environment:
Java 11
JBoss 7.2
Maven 3.5
I am getting this ERROR java.lang.ClassNotFoundException: net.sf.jasperreports.engine.JRException when I try to execute a method from a class in app-commons module. Jasper dependency in app-commons is compiled and app-commons dependency in app-back is provided.
How could I solve this?
Error
09:29:24,013 SEVERE [org.primefaces.application.exceptionhandler.PrimeExceptionHandler] (default task-1) net/sf/jasperreports/engine/JRException: java.lang.NoClassDefFoundError: net/sf/jasperreports/engine/JRException
...
Caused by: java.lang.ClassNotFoundException: net.sf.jasperreports.engine.JRException from [Module "deployment.accfor2.ear" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:255)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
... 78 more
Modules:
app (pom)
app-ear
app-back
app-commons (provided)
app-front
app-commons (provided)
app-commons
jasperreports (compiled)
...
pom.xml (app-commons)
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.name.app</groupId>
<artifactId>app</artifactId>
<version>8.0.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>app-commons</artifactId>
<packaging>jar</packaging>
<name>app-commons</name>
...
<dependencies>
<dependency>
<groupId>net.sf.jasperreports</groupId>
<artifactId>jasperreports</artifactId>
<version>6.15.0</version>
</dependency>
</dependencies>
...
ReportManager.java (app-commons)
public class ReportManager {
...
public static void addParam(Map<String, Object> params, String nom, byte[] compiledReport) throws ReportException {
try {
params.put(nom, SerializationUtils.deserialize(compiledReport));
} catch (Exception e) {
throw new ReportException("Error deserialize compiledReport.");
}
}
...
pom.xml (app-back)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.name.app</groupId>
<artifactId>app</artifactId>
<version>8.0.0</version>
</parent>
<artifactId>app-back</artifactId>
<packaging>war</packaging>
<name>app-back</name>
<description>Módul back (intranet)</description>
<dependencies>
...
<dependency>
<groupId>com.name.app</groupId>
<artifactId>app-commons</artifactId>
<scope>provided</scope>
</dependency>
...
ExecuteReportBean.java (app-back)
public class ExecuteReportBean.java
...
public void compileReport(Informe informe, Map<String, Object> parametresSend) {
ReportManager.compilaReport(parametre.getJasperReport());//ERROR java.lang.ClassNotFoundException: net.sf.jasperreports.engine.JRException
...

Answer 1

If you declare the dependency as provided, it will not be packaged into the WAR.
Either change the scope to compile or let the application server provide it (by e.g. putting it into a JBoss module).

Answer 2

Because of transitive dependencies are not included when dependency is provided, so I had to restructure the modules this way.
Modules:
app (pom)
app-ear
jasperreports (compiled) MOVED FROM APP-COMMONS
app-back
app-commons (provided)
app-front
app-commons (provided)
app-commons
...
I was not able to change app-commons dependency to compiled because it is dependent of app-front and app-back. In app-commons as compiled I have an #ApplicationScope class that it would produce ambiguous Beans pointing to the class in app-commons because of jakartaee context management.