[FIXED] Spring Boot, ClassNotDef Error with JaxB, Package -Info.java

Issue

I am using AJSC framework in SpringBoot with JaxB implementation. I built the stubs outside the project and copied them inside the project with proper directories.

However, during API execution, i get a classNotDef error. But I have seen my Jar file and i have the package-info class file inside the directory.

Caused by: java.lang.NoClassDefFoundError: BOOT-INF/classes/com/att/fpp/fpprome/opportunity/package-info (wrong name: com/att/fpp/fpprome/opportunity/package-info)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$100(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:94)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.hibernate.annotations.common.util.StandardClassLoaderDelegateImpl.classForName(StandardClassLoaderDelegateImpl.java:57)
    at org.hibernate.boot.internal.MetadataBuilderImpl$MetadataBuildingOptionsImpl$4.classForName(MetadataBuilderImpl.java:758)
    at org.hibernate.annotations.common.reflection.java.JavaReflectionManager.packageForName(JavaReflectionManager.java:148)
    at org.hibernate.cfg.AnnotationBinder.bindPackage(AnnotationBinder.java:281)
    at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.prepare(AnnotationMetadataSourceProcessorImpl.java:186)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.prepare(MetadataBuildingProcess.java:156)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:253)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:847)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874)
    at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
    at acsi.grid.gridcore.core.sql.EntityManagerHelper.getDefaultEntityManager(EntityManagerHelper.java:250)
    at acsi.grid.gridcore.core.sql.EntityManagerHelper.getEntityManager(EntityManagerHelper.java:174)
    at acsi.grid.gridcore.core.JdbcGridBagImpl.getEntityManager(JdbcGridBagImpl.java:188)
    at acsi.grid.gridcore.core.JdbcGridBagImpl.put(JdbcGridBagImpl.java:163)
    at com.att.fpp.fpprome.dao.impl.OpportunityDaoImpl.updateOpportunityDatabaseROME(OpportunityDaoImpl.java:497)
    at com.att.fpp.fpprome.bo.impl.OpportunityBusinessObjectImpl.getOpptyInfo(OpportunityBusinessObjectImpl.java:78)
    at com.att.fpp.fpprome.service.impl.OpportunityServiceImpl.getOpportunitiesById(OpportunityServiceImpl.java:62)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:180)
    at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)

Also I noticed that I am not using apache.cxf anywhere in pom but yet it is being called here.

Solution

Found the issue. The AJSC framework implementing the ADF (Hibernate based ORM) did not support package-info and hence searched for that class everytime.

Only way around was to execute the command to not generate the package-info during stubs generation.

Use -npa in XJC utility to suppress package-info and everything will work.

Answered By - Grim42
Answer Checked By - Candace Johnson (JavaFixing Volunteer)