OpenJDK9 + org.jboss.tools.common: java.lang.Exception: No valid JDK found --------------------------------------------------------------------------- Key: JBIDE-25556 URL: https://issues.jboss.org/browse/JBIDE-25556 Project: Tools (JBoss Tools) Issue Type: Bug Components: common Affects Versions: 4.5.2.AM3 Environment: FC27 + OpenJDK9 Reporter: Josef Kopriva Assignee: Rob Stryker Fix For: 4.5.x Error message from error log: {code:java} eclipse.buildId=11.2.0.AM3-v20180105-1612-B1822 java.version=9.0.1 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -product com.jboss.devstudio.core.product Command-line arguments: -data file:/home/jkopriva/devstudio_B1822-Java9-2/workspace/ -os linux -ws gtk -arch x86_64 -product com.jboss.devstudio.core.product org.jboss.tools.common.jdt.debug Error Thu Jan 11 10:45:50 CET 2018 java.lang.Exception: No valid JDK found in your eclipse workspace for JBoss Tools Launching Support. Please add one at Window -> Preferences -> Installed JREs. java.lang.Exception: No valid JDK found in your eclipse workspace for JBoss Tools Launching Support. Please add one at Window -> Preferences -> Installed JREs. at org.jboss.tools.common.jdt.debug.tools.internal.Tools.findFirstValidVMInstall(Tools.java:275) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.findSecondaryVMInstall(Tools.java:432) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.findHomeDirectoryToAddToClasspath(Tools.java:417) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getToolsJar(Tools.java:146) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getToolsLoader(Tools.java:121) at org.jboss.tools.common.jdt.debug.tools.internal.Tools.reset(Tools.java:114) 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.base/java.util.TimerThread.mainLoop(Timer.java:556) at java.base/java.util.TimerThread.run(Timer.java:506) {code}