Hello, in the process of updating our environment to the latest version of
Java, we've found an issue with the latest version of JaCoCo and the
J9/Semeru VM. When trying to run the jacoco:merge target of our builds,
we're getting the error below.
If we switch to the HotSpot/Temurin VM, the tests pass and the coverage
reports are produced as expected.
We ran into a similar issue with 0.8.5 and the J9 VM. In that instance,
reverting to 0.8.2 and adding some Xbootclasspath/a: entries to the startup
configuration for JBoss fixed the issue. That's not an option for Java 17
as we need 0.8.8 to support it, at least according to the docs.
Have we once again bumped into an incompatibility between JaCoCo and the J9
VM?
Thanks,
-a
Error StackTrace when trying to start JBoss (WildFly v26.1.1)
Exception in thread "main" java.lang.NoClassDefFoundError: java.lang.$JaCoCo
at
org.jboss.as.jmx<atSign>18.1.1.Final//org.jboss.as.jmx.PluggableMBeanServerBuilder.$jacocoInit(PluggableMBeanServerBuilder.java)
at
org.jboss.as.jmx<atSign>18.1.1.Final//org.jboss.as.jmx.PluggableMBeanServerBuilder.<init>(PluggableMBeanServerBuilder.java)
at java.base/java.lang.J9VMInternals.newInstanceImpl(Native Method)
at java.base/java.lang.Class.newInstance(Class.java:2353)
at
java.management/javax.management.MBeanServerFactory.newBuilder(MBeanServerFactory.java:461)
at
java.management/javax.management.MBeanServerFactory.checkMBeanServerBuilder(MBeanServerFactory.java:499)
at
java.management/javax.management.MBeanServerFactory.getNewMBeanServerBuilder(MBeanServerFactory.java:537)
at
java.management/javax.management.MBeanServerFactory.newMBeanServer(MBeanServerFactory.java:316)
at
java.management/javax.management.MBeanServerFactory.createMBeanServer(MBeanServerFactory.java:231)
at
java.management/javax.management.MBeanServerFactory.createMBeanServer(MBeanServerFactory.java:192)
at
java.management/java.lang.management.ManagementFactory.getPlatformMBeanServer(ManagementFactory.java:484)
at org.jboss.modules.Main.main(Main.java:545)
Caused by: java.lang.ClassNotFoundException: java.lang.$JaCoCo from [Module
"org.jboss.as.jmx" version 18.1.1.Final from local module loader @c531709d
(finder: local module finder @13efed7d (roots:
C:\Development\WildFly\modules,C:\Development\WildFly\modules\system\layers\base))]
at
org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:200)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
at
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
... 12 more
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