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  1. JBoss Log Manager
  2. LOGMGR-218

JBoss Logmanager is incompatibile with -Xbootclasspath and JDK 11

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      The current logmanager implementation is incompatible with use with the -Xbootclasspath/a option on JDK 11. The is because it is a multi-release jar which is incompatible with -Xbootclasspath/a. This is problematic because to allow Java Agents to work with JBoss Modules based applications (i.e. WildFly and derivatives) often it is necessary to include logmanager in -Xbootclasspath/a .

      Here's me starting WildFly with a -Xbootclasspath/a setting and JDK 11:

      $ build/target/wildfly-core-7.0.0.CR2-SNAPSHOT/bin/standalone.sh 
=========================================================================

  JBoss Bootstrap Environment

  JBOSS_HOME: /Users/bstansberry/dev/wildfly/wildfly-core/build/target/wildfly-core-7.0.0.CR2-SNAPSHOT

  JAVA: /Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home/bin/java

  JAVA_OPTS:  -server -Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman,org.jboss.logmanager -Djava.awt.headless=true -Xbootclasspath/a:/Users/bstansberry/dev/wildfly/wildfly-core/dist/target/wildfly-core-7.0.0.CR2-SNAPSHOT/modules/system/layers/base/org/jboss/logmanager/main/jboss-logmanager-2.1.5.Final.jar -Djava.util.logging.manager=org.jboss.logmanager.LogManager  --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED --add-exports=jdk.unsupported/sun.reflect=ALL-UNNAMED --add-modules=java.se

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WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jboss.logmanager.LogLevelInitTask to constructor java.util.logging.Level$KnownLevel(java.util.logging.Level)
WARNING: Please consider reporting this to the maintainers of org.jboss.logmanager.LogLevelInitTask
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
java.lang.IllegalStateException: The LogManager was not properly installed (you must set the "java.util.logging.manager" system property to "org.jboss.logmanager.LogManager")
	at org.jboss.logmanager.Logger.getLogger(Logger.java:57)
	at org.jboss.as.server@7.0.0.CR2-SNAPSHOT//org.jboss.as.server.Main.main(Main.java:89)
	at org.jboss.modules.Module.run(Module.java:352)
	at org.jboss.modules.Module.run(Module.java:320)
	at org.jboss.modules.Main.main(Main.java:593)

      Right now jboss-logmanager is a multi-release jar. But, per the MR jar spec (https://openjdk.java.net/jeps/238) that is incompatible with -Xbootclasspath:

      Multi-release jars and the boot loader
      Multi-release JARs are not supported by the boot loader (for example, when a multi-release JAR file is declared with the -Xbootclasspath/a option). Such support would complicate the boot loader implementation for what is considered a rare use-case.

      At this point I've identified two java agents that are commonly used with WildFly derived apps that cannot be installed in a JDK 11 environment: Hawkular and the Prometheus jmx-exporter. The former I could perhaps work around (i.e. don't install it with JDK 11) as it's use is deprecated. But being able to use of jmx-exporter is quite important.

              jperkins-rhn James Perkins
              bstansbe@redhat.com Brian Stansberry
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