[MYFACES-4469] "java.lang.IllegalArgumentException: object is not an instance of declaring class" occurs in FacesConfigurator.purgeConfiguration

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.0-RC1, 2.3.10, 2.3-next-M7, 3.0.2
• Fix Version/s: 2.3.11, 3.0.3, 2.3-next-M8, 2.2.16, 4.0.1
• Assignee: Volodymyr Siedlecki
• Reporter: Volodymyr Siedlecki
• Created: 27/Sep/22 14:38
• Updated: 12/Jun/23 12:58
• Resolved: 30/Mar/23 08:31

Description

If an application uses a custom factory via META-INF/services (such as javax.faces.application.ApplicationFactory), then a purge failure can occur when in development mode when an update occurs to the faces-config.xml. Additionally, the server must not restart the application (which can occur).

java.lang.IllegalArgumentException: object is not an instance of declaring class
…
at java.lang.reflect.Method.invoke(Method.java:508)
org.apache.myfaces.config.FacesConfigurator.purgeConfiguration(FacesConfigurator.java:555)
at org.apache.myfaces.config.FacesConfigurator.update(FacesConfigurator.java:485)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:136)

Code where the exception can occur: https://github.com/apache/myfaces/blob/e9fe59f96410f31a7f5c0fbd6838c1a22683a691/impl/src/main/java/org/apache/myfaces/config/FacesConfigurator.java#L452-L456

getPurgeMethod unwraps the factory to get the method, but it then calls the private method on the wrong class ( which doesn't have that purge method)

Issue Links

• links to: GitHub Pull Request #354