Eclipse点击Run As运行类触发未处理事件循环异常的解决方法

我之前也碰到过几乎一模一样的问题，从你贴的报错栈能一眼看出来——核心问题出在TestNG插件的启动检测逻辑上，整个调用链都是TestNG相关的类（比如TestSearchEngine、JavaTypeExtender）在抛出异常，直接卡死了Eclipse的事件循环。下面是几个亲测有效的解决办法：

首先先整理你的报错信息：

java.lang.IllegalArgumentException at org.eclipse.jdt.core.dom.ASTParser.<init>(ASTParser.java:226) at org.eclipse.jdt.core.dom.ASTParser.newParser(ASTParser.java:125) at org.testng.eclipse.util.TestSearchEngine.doIsTest(TestSearchEngine.java:273) at org.testng.eclipse.util.TestSearchEngine.doIsTest(TestSearchEngine.java:257) at org.testng.eclipse.util.TestSearchEngine.isTest(TestSearchEngine.java:225) at org.testng.eclipse.launch.tester.JavaTypeExtender.isTest(JavaTypeExtender.java:29) at org.testng.eclipse.launch.tester.JavaTypeExtender.test(JavaTypeExtender.java:14) at org.testng.eclipse.launch.tester.TestNGPropertyTester.isTestClass(TestNGPropertyTester.java:60) at org.testng.eclipse.launch.tester.TestNGPropertyTester.test(TestNGPropertyTester.java:42) at org.eclipse.core.internal.expressions.Property.test(Property.java:58) at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:99) at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53) at org.eclipse.core.internal.expressions.IterateExpression.evaluate(IterateExpression.java:150) at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53) at org.eclipse.core.internal.expressions.WithExpression.evaluate(WithExpression.java:72) at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53) at org.eclipse.core.internal.expressions.EnablementExpression.evaluate(EnablementExpression.java:53) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.evalEnablementExpression(LaunchShortcutExtension.java:287) at org.eclipse.debug.ui.actions.ContextualLaunchAction.isApplicable(ContextualLaunchAction.java:295) at org.eclipse.debug.ui.actions.ContextualLaunchAction.fillMenu(ContextualLaunchAction.java:218) at org.eclipse.debug.ui.actions.ContextualLaunchAction$1.menuShown(ContextualLaunchAction.java:137) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:255) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774) at org.eclipse.jface.action.ActionContributionItem.copyMenu(ActionContributionItem.java:1268) at org.eclipse.jface.action.ActionContributionItem.handleShowProxy(ActionContributionItem.java:1248) at org.eclipse.jface.action.ActionContributionItem.access$4(ActionContributionItem.java:1237) at org.eclipse.jface.action.ActionContributionItem$8.handleEvent(ActionContributionItem.java:1210) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058) at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:4881) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4557) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976) at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method) at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:257) at org.eclipse.swt.widgets.Display.runPopups(Display.java:4210) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3752) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:18

具体解决步骤 #

1. 优先处理TestNG插件（最可能解决问题） #

因为异常完全是TestNG插件触发的，所以先从这里入手：

• 强制结束卡住的Eclipse进程（任务管理器里找eclipse.exe）
• 重启Eclipse时加上-clean参数：找到Eclipse启动快捷方式，右键打开属性，在目标栏末尾加上 -clean（注意前面有空格），启动后会自动清理插件缓存
• 如果还是不行，直接卸载TestNG插件：打开Help > About Eclipse > Installation Details，找到TestNG相关条目，点击Uninstall，重启后再尝试运行Java类。之后如果需要TestNG，再安装最新版本的插件，旧版本大概率和你的Eclipse版本不兼容。

2. 绕过右键菜单，直接创建运行配置 #

如果暂时不想卸载插件，可以跳过有问题的右键检测逻辑：

• 打开Run > Run Configurations
• 右键Java Application选择New
• 在Main标签页点击Search，选中你的主类，然后直接点Run，这样就能绕过TestNG的检测逻辑正常运行。

3. 清理工作空间缓存 #

有时候工作空间的缓存损坏也会导致这类奇怪的异常：

• 关闭Eclipse
• 找到你的工作空间文件夹，删除.metadata文件夹（记得备份里面的自定义配置，比如快捷键、视图布局）
• 重新启动Eclipse，导入项目后再尝试运行。

4. 检查JRE兼容性 #

确保项目使用的JRE和Eclipse本身的JRE版本一致：

• 打开Window > Preferences > Java > Installed JREs，确认默认JRE是Eclipse自带的或者兼容的版本
• 右键项目，选择Properties > Java Build Path > Libraries，把JRE System Library换成默认的JRE。

内容的提问来源于stack exchange，提问作者ChanGan