SWT没有更多的句柄 - 在Windows 7

Question

根据客户端，我正在研究一个神秘停止工作的旧RCP应用程序。经过很多挫折之后，我终于抓住了原始开发人员的电脑（一台XP机器）。它在那台电脑上运行良好，很好。

所以我编译它，并把它放在另一台XP机器上，它运行良好。

在Windows 7机器上运行它，它显示splashscreen，然后显示关闭前一秒的主UI。

所以我复制该项目的Eclipse的工作环境到Windows 7的机器，和它给了我同样的行为，再加上错误信息：

org.eclipse.swt.SWTError: No more handles 

显然，Sleak应该是答案对于内存泄漏，但它在整个程序死亡之前也只持续一秒钟。我不认为这是内存泄漏;启动时仅打开两个视图。 Windows 7中是否有可能限制手柄的内容？

以下是完整的错误消息：

org.eclipse.swt.SWTError: No more handles 
at org.eclipse.swt.SWT.error(SWT.java:3803) 
at org.eclipse.swt.SWT.error(SWT.java:3695) 
at org.eclipse.swt.SWT.error(SWT.java:3666) 
at org.eclipse.swt.graphics.Image.<init>(Image.java:730) 
at org.eclipse.jface.resource.FileImageDescriptor.createImage(FileImageDescriptor.java:176) 
at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:227) 
at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:205) 
at org.eclipse.gef.ui.palette.editparts.PaletteEditPart$ImageCache.getImage(PaletteEditPart.java:396) 
at org.eclipse.gef.ui.palette.editparts.PaletteEditPart.setImageDescriptor(PaletteEditPart.java:353) 
at org.eclipse.gef.internal.ui.palette.editparts.ToolEntryEditPart.refreshVisuals(ToolEntryEditPart.java:455) 
at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:676) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:571) 
at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) 
at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) 
at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:727) 
at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:677) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:571) 
at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) 
at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) 
at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:727) 
at org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractEditPart.java:677) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh(AbstractGraphicalEditPart.java:571) 
at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:235) 
at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:219) 
at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:198) 
at org.eclipse.gef.editparts.SimpleRootEditPart.setContents(SimpleRootEditPart.java:101) 
at org.eclipse.gef.ui.palette.PaletteViewer.setPaletteRoot(PaletteViewer.java:397) 
at org.eclipse.gef.EditDomain.setPaletteViewer(EditDomain.java:360) 
at org.eclipse.gef.ui.palette.PaletteViewerProvider.hookPaletteViewer(PaletteViewerProvider.java:76) 
at org.eclipse.gef.ui.palette.PaletteViewerProvider.createPaletteViewer(PaletteViewerProvider.java:59) 
at org.eclipse.gef.ui.views.palette.PaletteViewerPage.createControl(PaletteViewerPage.java:63) 
at org.eclipse.gef.ui.views.palette.PaletteView.doCreatePage(PaletteView.java:100) 
at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:399) 
at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:741) 
at org.eclipse.ui.internal.PartListenerList$1.run(PartListenerList.java:72) 
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) 
at org.eclipse.core.runtime.Platform.run(Platform.java:880) 
at org.eclipse.ui.internal.PartListenerList.fireEvent(PartListenerList.java:57) 
at org.eclipse.ui.internal.PartListenerList.firePartActivated(PartListenerList.java:70) 
at org.eclipse.ui.internal.PartService.firePartActivated(PartService.java:186) 
at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:305) 
at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:56) 
at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:126) 
at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3491) 
at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:610) 
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2832) 
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2729) 
at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2721) 
at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2673) 
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) 
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668) 
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2652) 
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2635) 
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:708) 
at [companyname].gef.ApplicationWorkbenchWindowAdvisor.postWindowOpen(ApplicationWorkbenchWindowAdvisor.java:111) 
at org.eclipse.ui.internal.WorkbenchWindow.fireWindowOpened(WorkbenchWindow.java:1229) 
at org.eclipse.ui.internal.WorkbenchWindow.open(WorkbenchWindow.java:786) 
at org.eclipse.ui.internal.Workbench$22.runWithException(Workbench.java:1043) 
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) 
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) 
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133) 
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800) 
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425) 
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803) 
at org.eclipse.ui.internal.Workbench$27.runWithException(Workbench.java:1363) 
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) 
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) 
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133) 
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800) 
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425) 
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2295) 
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200) 
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495) 
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) 
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490) 
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) 
at [companyname].gef.Application.start(Application.java:28) 
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) 
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:386) 
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
at java.lang.reflect.Method.invoke(Unknown Source) 
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549) 
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) 
at org.eclipse.equinox.launcher.Main.run(Main.java:1236) 
at org.eclipse.equinox.launcher.Main.main(Main.java:1212) 

Answer 1

如果事情能正常工作在Win XP和Win 7的不工作，则其潜在的SWT错误。我建议你在Eclipse bugzilla中引发一个bug。

Answer 2

我已经有过很多次了，这与处置资源有关。您可能正在创建Font，Image对象，并且不会通过显式调用.dispose（）来释放它们。我怀疑它与Windows 7有关，它也会在那里发生，但可能需要更长的时间才能发生，因为您可能拥有该机器上的更多系统资源。确保您跟踪和处理您分配的资源通常可以解决问题。