Thread deadlock when starting Eclipse ------------------------------------- Key: JBIDE-23757 URL: https://issues.jboss.org/browse/JBIDE-23757 Project: Tools (JBoss Tools) Issue Type: Bug Components: server Affects Versions: 4.4.2.Final Environment: MacOS Sierra, JDK 1.8.0_112 Reporter: Jon Kranes Assignee: Rob Stryker Fix For: 4.4.3.AM2 Steps to reproduce: * Install latest Eclipse (Neon 4.6.2) (also tested with Spring ToolSuite 3.8.3 with same result) * Install JBoss AS, Wildfly & EAP Server Tools from JBoss Tools 4.4.2 Final * Add Wildfly 10.x runtime to Eclipse (tested 10.0 and 10.1 with same results) * Add Wildfly 10.x server to Eclipse * Create a default Maven Web App project * Add the web app project to the Wildfly server * Exit Eclipse and restart Eclipse hangs on startup with a thread deadlock. Eclipse "Progress" window shows "Registering Listeners" which never completes and blocks other Eclipse startup tasks. At this point Eclipse cannot exit and must be force-quit. Thread dump output from jvisualvm shows a thread deadlock: Found one Java-level deadlock: ============================= "Thread-8": waiting to lock monitor 0x000000011fe4e758 (object 0x0000000782b7aa00, a org.eclipse.wst.server.core.internal.Server), which is held by "Worker-0" "Worker-0": waiting to lock monitor 0x0000000101a566e8 (object 0x0000000782b7aa70, a org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager), which is held by "Thread-8" Java stack information for the threads listed above: =================================================== "Thread-8": at org.eclipse.wst.server.core.internal.Server.getServerNotificationManager(Server.java:1034) - waiting to lock <0x0000000782b7aa00> (a org.eclipse.wst.server.core.internal.Server) at org.eclipse.wst.server.core.internal.Server.removeServerListener(Server.java:697) at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.protectAddManagerAsListeners(UnitedServerListenerManager.java:152) - locked <0x0000000782b7aa70> (a org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager) at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.initializeManager(UnitedServerListenerManager.java:81) at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.access$1(UnitedServerListenerManager.java:73) at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager$1.run(UnitedServerListenerManager.java:68) "Worker-0": at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.addListener(UnitedServerListenerManager.java:109) - waiting to lock <0x0000000782b7aa70> (a org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager) at org.jboss.ide.eclipse.as.core.JBossServerCorePlugin.start(JBossServerCorePlugin.java:74) at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:774) at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:767) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:724) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:932) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:309) at org.eclipse.osgi.container.Module.doStart(Module.java:581) at org.eclipse.osgi.container.Module.start(Module.java:449) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:470) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:529) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:325) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:345) at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:423) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:372) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:364) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:564) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55) at org.eclipse.wst.server.core.internal.ServerType.createServerDelegate(ServerType.java:91) at org.eclipse.wst.server.core.internal.Server.getDelegate(Server.java:506) - locked <0x0000000782b7aa00> (a org.eclipse.wst.server.core.internal.Server) at org.eclipse.wst.server.core.internal.Server.getChildModules(Server.java:2634) at org.eclipse.wst.server.core.internal.Server.visitModule(Server.java:3058) at org.eclipse.wst.server.core.internal.Server.visit(Server.java:3039) at org.eclipse.wst.server.core.internal.Server.getAllModules(Server.java:1542) at org.eclipse.wst.server.ui.internal.cnf.ServersView2$3.run(ServersView2.java:189) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Found 1 deadlock.