Set assembly plugin runOnlyAtExecutionRoot=false to make sure each jar file get's it source-release.zip attachment
diff --git a/parent/pom.xml b/parent/pom.xml
index ba3326c..e50ab81 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -93,4 +93,28 @@
             </plugins>
         </pluginManagement>
     </build>
+
+   <profiles>
+        <profile>
+            <id>apache-release</id>
+            <build>
+                <plugins>
+                    <!-- Set runOnlyAtExecutionRoot=false to make sure each jar file get's it source-release.zip attachment -->
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-assembly-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>source-release-assembly</id>
+                                <configuration>
+                                    <runOnlyAtExecutionRoot>false</runOnlyAtExecutionRoot>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+    
 </project>