ClassNotFoundException thrown on devstudio start up --------------------------------------------------- Key: JBDS-4180 URL: https://issues.jboss.org/browse/JBDS-4180 Project: Red Hat JBoss Developer Studio (devstudio) Issue Type: Bug Components: foundation, upstream Affects Versions: 10.2.0.GA Environment: Fedora 24, openjdk version "1.8.0_102" OpenJDK Runtime Environment (build 1.8.0_102-b14) Reporter: Marián Labuda Assignee: Rob Stryker Fix For: 10.x When starting latest DevStudio 10.2.0.GA (build ID GA-v20161116-0039-B6472) I get following error in console output {code} SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder] Noop constructor java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitoredHost at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.eclipse.osgi.internal.framework.ContextFinder.loadClass(ContextFinder.java:132) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeGetMonitoredHost(Tools.java:513) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.validateClassPathAndLibraryPath(Tools.java:365) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.reset(Tools.java:115) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.<init>(Tools.java:82) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getInstance(Tools.java:73) at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getActiveProcessIds(ToolsCore.java:179) at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler.updatesActiveJvms(JvmAttachHandler.java:100) at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler$1.run(JvmAttachHandler.java:78) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505) java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitoredHost at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.eclipse.osgi.internal.framework.ContextFinder.loadClass(ContextFinder.java:132) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeGetMonitoredHost(Tools.java:513) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeActiveVms(Tools.java:525) at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getActiveProcessIds(ToolsCore.java:179) at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler.updatesActiveJvms(JvmAttachHandler.java:100) at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler$1.run(JvmAttachHandler.java:78) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505) {code} problem is with openjdk version. With the lates 1.8.0_111 it works.