[jbosstools-issues] [JBoss JIRA] (JBIDE-17843) Connecting to a local JBoss AS process in JMX Navigator fails - java version

Connecting to a local JBoss AS process in JMX Navigator fails - java version ---------------------------------------------------------------------------- Key: JBIDE-17843 URL: https://issues.jboss.org/browse/JBIDE-17843 Project: Tools (JBoss Tools) Issue Type: Bug Components: jmx Affects Versions: 4.2.0.Beta3 Environment: JBDS 8.0.0.Beta3 B172 running with java 8 JBoss AS 7.1 running with java 6 workspace default is java 8 Reporter: Martin Malina Assignee: Rob Stryker Priority: Critical Labels: respin-a Fix For: 4.2.0.Beta3 I started a local JBoss AS 7.1 server and then tried to connect to the java process in JMX Navigator in Local Processes. When I tried to connect, I got this in the server log: {code} Exception in thread "Attach Listener" 10:13:20,404 ERROR [stderr] (Attach Listener) java.lang.UnsupportedClassVersionError: org/jboss/tools/jmx/jvmmonitor/internal/agent/Agent : Unsupported major.minor version 51.0 10:13:20,405 ERROR [stderr] (Attach Listener) at java.lang.ClassLoader.defineClass1(Native Method) 10:13:20,405 ERROR [stderr] (Attach Listener) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) 10:13:20,405 ERROR [stderr] (Attach Listener) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) 10:13:20,406 ERROR [stderr] (Attach Listener) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 10:13:20,406 ERROR [stderr] (Attach Listener) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) 10:13:20,406 ERROR [stderr] (Attach Listener) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 10:13:20,406 ERROR [stderr] (Attach Listener) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) 10:13:20,407 ERROR [stderr] (Attach Listener) at java.security.AccessController.doPrivileged(Native Method) 10:13:20,407 ERROR [stderr] (Attach Listener) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 10:13:20,407 ERROR [stderr] (Attach Listener) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 10:13:20,407 ERROR [stderr] (Attach Listener) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) 10:13:20,408 ERROR [stderr] (Attach Listener) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 10:13:20,408 ERROR [stderr] (Attach Listener) at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:280) 10:13:20,408 ERROR [stderr] (Attach Listener) at sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain(InstrumentationImpl.java:348) Agent failed to start! {code} Java version 51.0 indicates Java SE 7. This is probably because the AS is running with java 6, but the attached agent jar is built with java 7.