I am using MyEclipse 7.5 and have created a new report project. I created a simple report but an unable to preview it. When I click the preview tab, it just hangs. I can sample the associated dataset just fine. Max data rows is 100. It is a very simple query, no joins. Database server shows it is not doing anything.

One other note: I can get sample rows in the dataset properties screen. It works just fine.

Could there be a problem with log4j not in the path?

java.lang.ExceptionInInitializerError
at org.eclipse.equinox.http.jetty.internal.HttpServerManager.updated(HttpServerManager.java:60)
at org.eclipse.equinox.http.jetty.internal.Activator.startServer(Activator.java:209)
at org.eclipse.equinox.http.jetty.JettyConfigurator.startServer(JettyConfigurator.java:43)
at org.eclipse.birt.report.viewer.utilities.AppServerWrapper.start(AppServerWrapper.java:159)
at org.eclipse.birt.report.viewer.utilities.WebappAccessor.start(WebappAccessor.java:72)
at org.eclipse.birt.report.viewer.utilities.WebViewer.startWebApp(WebViewer.java:719)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:948)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:942)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewEditor.display(ReportPreviewEditor.java:507)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.refresh(ReportPreviewFormPage.java:160)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.onBroughtToTop(ReportPreviewFormPage.java:106)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.prePageChanges(MultiPageReportEditor.java:840)
at org.eclipse.birt.report.designer.ui.editors.IDEMultiPageReportEditor.prePageChanges(IDEMultiPageReportEditor.java:534)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.pageChange(MultiPageReportEditor.java:764)
at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:266)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:770)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3242)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2017)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
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 org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
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(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@a406e8 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category) (Caused by org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@a406e8 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category))
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.mortbay.log.LogFactory.getLog(LogFactory.java:28)
at org.mortbay.util.Container.<clinit>(Container.java:38)
... 49 more
Caused by: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@a406e8 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
... 53 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Category
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.getConstructor(Class.java:1657)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
... 54 more
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Category
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:483)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:399)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:387)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 59 more

!ENTRY org.eclipse.ui 4 0 2009-06-18 11:40:42.765
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NoClassDefFoundError: Could not initialize class org.mortbay.http.HttpServer
at org.eclipse.equinox.http.jetty.internal.HttpServerManager.updated(HttpServerManager.java:60)
at org.eclipse.equinox.http.jetty.internal.Activator.startServer(Activator.java:209)
at org.eclipse.equinox.http.jetty.JettyConfigurator.startServer(JettyConfigurator.java:43)
at org.eclipse.birt.report.viewer.utilities.AppServerWrapper.start(AppServerWrapper.java:159)
at org.eclipse.birt.report.viewer.utilities.WebappAccessor.start(WebappAccessor.java:72)
at org.eclipse.birt.report.viewer.utilities.WebViewer.startWebApp(WebViewer.java:719)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:948)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:942)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewEditor.display(ReportPreviewEditor.java:507)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.refresh(ReportPreviewFormPage.java:160)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.onBroughtToTop(ReportPreviewFormPage.java:106)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.prePageChanges(MultiPageReportEditor.java:840)
at org.eclipse.birt.report.designer.ui.editors.IDEMultiPageReportEditor.prePageChanges(IDEMultiPageReportEditor.java:534)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.pageChange(MultiPageReportEditor.java:764)
at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:266)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:770)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3242)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2017)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
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 org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
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(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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)

!ENTRY org.eclipse.ui 4 0 2009-06-18 11:52:46.250
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NoClassDefFoundError: Could not initialize class org.mortbay.http.HttpServer
at org.eclipse.equinox.http.jetty.internal.HttpServerManager.updated(HttpServerManager.java:60)
at org.eclipse.equinox.http.jetty.internal.Activator.startServer(Activator.java:209)
at org.eclipse.equinox.http.jetty.JettyConfigurator.startServer(JettyConfigurator.java:43)
at org.eclipse.birt.report.viewer.utilities.AppServerWrapper.start(AppServerWrapper.java:159)
at org.eclipse.birt.report.viewer.utilities.WebappAccessor.start(WebappAccessor.java:72)
at org.eclipse.birt.report.viewer.utilities.WebViewer.startWebApp(WebViewer.java:719)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:948)
at org.eclipse.birt.report.viewer.utilities.WebViewer.display(WebViewer.java:942)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewEditor.display(ReportPreviewEditor.java:507)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.refresh(ReportPreviewFormPage.java:160)
at org.eclipse.birt.report.designer.ui.preview.editors.ReportPreviewFormPage.onBroughtToTop(ReportPreviewFormPage.java:106)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.prePageChanges(MultiPageReportEditor.java:840)
at org.eclipse.birt.report.designer.ui.editors.IDEMultiPageReportEditor.prePageChanges(IDEMultiPageReportEditor.java:534)
at org.eclipse.birt.report.designer.ui.editors.MultiPageReportEditor.pageChange(MultiPageReportEditor.java:764)
at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:266)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:770)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3242)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2017)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
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 org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
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(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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)

This sounds more like an installation / configuration related issue. Can you go to MyEclipse > installation Summary > Installation Details and paste the information here for us. Did you update to 7.5 from 7.1.1 or setup MyEclipse 7.5 from scratch?

I noticed you have reported a performance issue as well with ME 7.5 which is very strange. I would suggest you switch to a new workspace and test the performance as well as previewing reports.

Let me know what result you get in the new workspace.

Using a brand new workspace seems to have fixed it. Thanks.

Your welcome.