[CAY-2253] Cayenne JDK9 compatibility

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.M5
• Fix Version/s: 4.0.RC1, 4.1.M2
• Environment: Java 9
• Assignee: Nikita Timofeev
• Reporter: Nikita Timofeev
• Created: 02/Mar/17 11:26
• Updated: 25/Jan/18 09:11
• Resolved: 25/Jan/18 09:11

Description

1. All tests that validate di.spi.ModuleProvider presence fail as ServiceLoader loads 2 providers instead of 1.
2. cayenne-server
   All tests related to hessian serialization are in error.
3. cayenne-client
   All tests related to hessian serialization are in error.

   Unable to make private java.lang.StackTraceElement() accessible: module java.base does not "opens java.lang" to unnamed module

4. cayenne-crypto
   javax.xml.bind.DatatypeConverter moved to a module that is not loaded by default
   see http://mail.openjdk.java.net/pipermail/jdk9-dev/2016-May/004309.html

   Caused by: java.lang.ClassNotFoundException: javax.xml.bind.DatatypeConverter
   at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:533)
   at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:186)
   at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:476)
   ... 32 more

5. cayenne-protostuff
   All tests related to protostuff serialization are in error.

   Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.lang.Object java.util.Collections$SingletonSet.element accessible: module java.base does not "opens java.util" to unnamed module

6. cayenne-doc
   Not really understood why this module is failing
7. tutorial-rop-server
   Seems that maven-war-plugin (3.0.0) is not compatible:

   [ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:3.0.0:war (default-war) on project tutorial-rop-server: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:3.0.0:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:3.0.0' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: null
   ...
   [ERROR] -----------------------------------------------------: ExceptionInInitializerError: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @7f51f588
   [ERROR] -> [Help 1]