我实现了编辑TopComponent。出于某种原因，当我保存文档时，它会抛出错误。下面列出的是错误。我不知道从这个例外开始。你能分享你所知道的吗？谢谢
java.lang.IllegalArgumentException: Self-causation not permitted
at java.lang.Throwable.initCause(Throwable.java:458)
at org.netbeans.modules.masterfs.filebasedfs.fileobjects.MutualExclusionSupport.addStack(MutualExclusionSupport.java:122)
at org.netbeans.modules.masterfs.filebasedfs.fileobjects.MutualExclusionSupport.addStack(MutualExclusionSupport.java:109)
at org.netbeans.modules.masterfs.filebasedfs.fileobjects.MutualExclusionSupport.addResource(MutualExclusionSupport.java:98)
at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:127)
at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:102)
at org.openide.text.DataEditorSupport$Env.outputStream(DataEditorSupport.java:891)
at org.openide.text.CloneableEditorSupport.saveDocument(CloneableEditorSupport.java:1172)
at org.openide.text.DataEditorSupport.superSaveDoc(DataEditorSupport.java:602)
at org.openide.text.DataEditorSupport$SaveImpl.run(DataEditorSupport.java:1315)
at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:609)
at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:415)
at org.openide.text.DataEditorSupport.saveDocument(DataEditorSupport.java:598)
at org.netbeans.modules.openide.loaders.SimpleES$SaveCookieImpl.save(SimpleES.java:226)
at org.openide.actions.SaveAction.performAction(SaveAction.java:132)
at org.openide.actions.SaveAction.performAction(SaveAction.java:102)
at org.openide.actions.SaveAction$Delegate.actionPerformed(SaveAction.java:249)
at org.openide.awt.ContextAction$Performer.actionPerformed(ContextAction.java:231)
at org.openide.awt.ContextManager.actionPerformed(ContextManager.java:257)
at org.openide.awt.ContextAction.actionPerformed(ContextAction.java:109)
at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:93)
at org.openide.util.actions.ActionInvoker$ActionRunnable.actionPerformed(ActionInvoker.java:162)
at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:109)
at org.netbeans.modules.openide.actions.ActionsBridgeImpl.invokeAction(ActionsBridgeImpl.java:60)
at org.openide.util.actions.ActionInvoker$ActionRunnable.doRun(ActionInvoker.java:153)
at org.openide.util.actions.ActionInvoker$2.run(ActionInvoker.java:110)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to
at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:114)
at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
at org.openide.awt.GeneralAction$BaseDelAction.actionPerformed(GeneralAction.java:234)
at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:1176)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2940)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2842)
at java.awt.Component.processEvent(Component.java:6282)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
at java.awt.Component.dispatchEventImpl(Component.java:4731)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
编辑1
我有一个dataObject和一个VisualElement子类，它们配置了一个新的mime-type text/x-puml。一旦我将这些更改回text/plain，事情就开始起作用了。我搜索了text/plain以查看我是否错过了将任何内容更改为text/x-puml，我找不到任何内容。我是否应该更改其他内容以将mime类型更改为text/x-puml？
编辑2
现在似乎偶尔发生，但经常发生。如果我有自定义的mime类型，我是否需要实现自己的SaveCookie或Savable？
答案 0 :(得分：1)
它看起来像是一个信号量问题。
系统无法保存文件，因为此文件存在独占锁定。另一个独占锁（根据需要保存）是不可能的。
尝试查看文件处理。某处必须是锁。
答案 1 :(得分：0)
由于重命名，我有类似的错误，这是因为文件的锁定。所以我在{：1}}中使用了文件锁：
primaryFile.lock()用它来保存文件或任何情况。