Custom handlers, formatters and filters cause the server to crash if the log manager is on the boot class path -------------------------------------------------------------------------------------------------------------- Key: WFCORE-4674 URL: https://issues.jboss.org/browse/WFCORE-4674 Project: WildFly Core Issue Type: Bug Components: Logging Reporter: James Perkins Assignee: James Perkins Priority: Critical Labels: OpenShift, jdk11 If the log manager is on the boot class path with Java 11, {{-Xbootclasspath/a:jboss-logmanager.jar}}, and a custom handler, formatter or filter is used the server will fail to boot as the log manager can't see the types in jboss-modules. This seems due to the fact that the log manager is on the boot class path and jboss-modules is on the system class path. Example exception: {code} Failed to read or configure the org.jboss.logmanager.LogManager java.lang.IllegalArgumentException: Failed to load module "org.jboss.logmanager" for formatter "JSON" at org.jboss.logmanager.config.AbstractPropertyConfiguration.<init>(AbstractPropertyConfiguration.java:65) at org.jboss.logmanager.config.FormatterConfigurationImpl.<init>(FormatterConfigurationImpl.java:30) at org.jboss.logmanager.config.LogContextConfigurationImpl.addFormatterConfiguration(LogContextConfigurationImpl.java:172) at org.jboss.logmanager.PropertyConfigurator.configureFormatter(PropertyConfigurator.java:631) at org.jboss.logmanager.PropertyConfigurator.configureHandler(PropertyConfigurator.java:701) at org.jboss.logmanager.PropertyConfigurator.configureLogger(PropertyConfigurator.java:583) at org.jboss.logmanager.PropertyConfigurator.configure(PropertyConfigurator.java:521) at org.jboss.logmanager.PropertyConfigurator.configure(PropertyConfigurator.java:97) at org.jboss.logmanager.LogManager.readConfiguration(LogManager.java:170) at org.jboss.logmanager.LogManager.readConfiguration(LogManager.java:132) at java.util.logging.LogManager$3.run(LogManager.java:399) at java.util.logging.LogManager$3.run(LogManager.java:396) at java.security.AccessController.doPrivileged(Native Method) at java.util.logging.LogManager.readPrimordialConfiguration(LogManager.java:396) at java.util.logging.LogManager.access$800(LogManager.java:145) at java.util.logging.LogManager$2.run(LogManager.java:345) at java.security.AccessController.doPrivileged(Native Method) at java.util.logging.LogManager.ensureLogManagerInitialized(LogManager.java:338) at java.util.logging.LogManager.getLogManager(LogManager.java:378) at org.jboss.modules.Main.main(Main.java:523) Caused by: java.lang.NoClassDefFoundError: org/jboss/modules/ModuleLoader at org.jboss.logmanager.config.AbstractPropertyConfiguration$ModuleFinder.getClassLoader(AbstractPropertyConfiguration.java:556) at org.jboss.logmanager.config.AbstractPropertyConfiguration.<init>(AbstractPropertyConfiguration.java:63) ... 19 more {code}