We are looking at upgrading some legacy code to Java 10. As JAXB is not visible by default (EDIT: and the proper long term solution is not to circumvent the symptom using various JVM flags, but fix it properly) I have added this snippet to my pom.xml:
<!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
Unfortunately there is still a warning printed at startup to stderr. Apparently this is not the correct fix.
WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/home/tra/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-impl-2.3.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release
The full output from --illegal-access=debug is:
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/home/tra/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-impl-2.3.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.getMethod(Injector.java:222)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.access$000(Injector.java:74)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:175)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:172)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.<clinit>(Injector.java:171)
at com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:81)
at com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:179)
at com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:285)
at com.sun.xml.bind.v2.runtime.property.ArrayProperty.<init>(ArrayProperty.java:68)
at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.<init>(ArrayERProperty.java:88)
at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.<init>(ArrayElementProperty.java:100)
at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.<init>(ArrayElementNodeProperty.java:62)
at com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:128)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:181)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:514)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:331)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:139)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1156)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:165)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:297)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:286)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:409)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at dk.statsbiblioteket.medieplatform.autonomous.PremisManipulatorFactory.<init>(PremisManipulatorFactory.java:28)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule.providePremisManipulatorFactory(DomsModule.java:182)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:32)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:11)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:56)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:12)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.doms.DomsRepository_Factory.get(DomsRepository_Factory.java:53)
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/home/tra/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-impl-2.3.0.jar) to method java.lang.ClassLoader.resolveClass(java.lang.Class)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.getMethod(Injector.java:222)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.access$000(Injector.java:74)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:175)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:172)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.<clinit>(Injector.java:171)
at com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:81)
at com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:179)
at com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:285)
at com.sun.xml.bind.v2.runtime.property.ArrayProperty.<init>(ArrayProperty.java:68)
at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.<init>(ArrayERProperty.java:88)
at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.<init>(ArrayElementProperty.java:100)
at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.<init>(ArrayElementNodeProperty.java:62)
at com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:128)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:181)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:514)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:331)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:139)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1156)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:165)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:297)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:286)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:409)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at dk.statsbiblioteket.medieplatform.autonomous.PremisManipulatorFactory.<init>(PremisManipulatorFactory.java:28)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule.providePremisManipulatorFactory(DomsModule.java:182)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:32)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:11)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:56)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:12)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.doms.DomsRepository_Factory.get(DomsRepository_Factory.java:53)
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/home/tra/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-impl-2.3.0.jar) to method java.lang.ClassLoader.findLoadedClass(java.lang.String)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.getMethod(Injector.java:222)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.access$000(Injector.java:74)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:175)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1.run(Injector.java:172)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.<clinit>(Injector.java:171)
at com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:81)
at com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:179)
at com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:285)
at com.sun.xml.bind.v2.runtime.property.ArrayProperty.<init>(ArrayProperty.java:68)
at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.<init>(ArrayERProperty.java:88)
at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.<init>(ArrayElementProperty.java:100)
at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.<init>(ArrayElementNodeProperty.java:62)
at com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:128)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:181)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:514)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:331)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:139)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1156)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:165)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:297)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:286)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:409)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at dk.statsbiblioteket.medieplatform.autonomous.PremisManipulatorFactory.<init>(PremisManipulatorFactory.java:28)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule.providePremisManipulatorFactory(DomsModule.java:182)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:32)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvidePremisManipulatorFactoryFactory.get(DomsModule_ProvidePremisManipulatorFactoryFactory.java:11)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:56)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.tools.modules.DomsModule_ProvideSBOIEventIndexFactory.get(DomsModule_ProvideSBOIEventIndexFactory.java:12)
at dk.statsbiblioteket.digital_pligtaflevering_aviser.doms.DomsRepository_Factory.get(DomsRepository_Factory.java:53)
What are the proper dependencies to use here to resolve this problem?
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Answer
jaxb-ri runtime uses ClassLoader#defineClass / Unsafe#defineClass to do some bytecode modification in runtime to optimize performance. ClassLoader#defineClass is tried first which causes the warning.
This legacy optimization is removed completely in jaxb-ri master (after 2.3.0, not released yet).
To disable this optimization for 2.3.0, set system property
com.sun.xml.bind.v2.bytecode.ClassTailor.noOptimize.
After next jaxb-ri release updating to newest version will remove the warning. jaxb-core artifact will be discontinued in favor for JPMS support. Correct pom will look like:
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.4.0</version>
</dependency>
If you wish to try early, you can pick latest promoted build from: https://maven.java.net/content/groups/promoted/org/glassfish/jaxb/jaxb-runtime/