[NETBEANS-3679] NetBeans plugin classloader does not work with multi-release JARs

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 11.2
• Component/s: core
• Assignee: Unassigned
• Reporter: Andreas Sewe
• Created: 09/Jan/20 12:29
• Updated: 09/Jan/20 12:29

Description

I have a plugin which uses Apache Log4J 2, which has the following (nice) API to request a Logger from the LogManager:

private static final Logger LOGGER = LogManager.getLogger();

Unfortunately, running NetBeans 11.2 on Java 13 causes the plugin to fail, with an ExceptionInInitializerError:

Caused by: java.lang.UnsupportedOperationException: No class provided, and an appropriate one cannot be found.
at org.apache.logging.log4j.LogManager.callerClass(LogManager.java:555)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:580)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:567)

AFAICT, the reason is the same as for a similar bug I recently reported in IntelliJ: NetBeans plugin classloader cannot handle multi-release JARs as per JEP 238, which is exactly what Log4J's StackLocatorUtil.getCallerClass needs to work on both Java 8 and 9 or newer (a more detailed analysis in the IntelliJ bug).

The effect of this limitation is that your NetBeans plugins cannot depend on any multi-release JARs like Log4J.