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on html files. always raises this error . and ide freezes. java.lang.NullPointerException at org.eclipse.jst.jsp.core.internal.contenttype.DeploymentDescriptorPropertyCache.getRelevantWebXMLPath(DeploymentDescriptorPropertyCache.java:936) at org.eclipse.jst.jsp.core.internal.contenttype.DeploymentDescriptorPropertyCache.getCachedDescriptor(DeploymentDescriptorPropertyCache.java:822) at org.eclipse.jst.jsp.core.internal.contenttype.DeploymentDescriptorPropertyCache.getJSPVersion(DeploymentDescriptorPropertyCache.java:869) at org.eclipse.jst.jsp.core.taglib.ProjectDescription.getAvailableTaglibRecords(ProjectDescription.java:1185) at org.eclipse.jst.jsp.core.taglib.TaglibIndex.internalGetAvailableTaglibRecords(TaglibIndex.java:866) at org.eclipse.jst.jsp.core.taglib.TaglibIndex.getAvailableTaglibRecords(TaglibIndex.java:497) at org.eclipse.jst.jsf.core.metadata.internal.TaglibMetaDataLocator.locateMetaDataModelProviders(TaglibMetaDataLocator.java:71) at org.eclipse.jst.jsf.common.metadata.internal.DomainLoadingStrategy.locateMetaDataSourceInstances(DomainLoadingStrategy.java:145) at org.eclipse.jst.jsf.common.metadata.internal.DomainLoadingStrategy.load(DomainLoadingStrategy.java:57) at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModel.load(MetaDataModel.java:95) at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModelManager.loadMetadata(MetaDataModelManager.java:152) at org.eclipse.jst.jsf.common.metadata.internal.MetaDataModelManager.getModel(MetaDataModelManager.java:95) at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getMDModel(MetaDataQueryHelper.java:126) at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getModel(MetaDataQueryHelper.java:61) at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getEntities(MetaDataQueryHelper.java:71) at org.eclipse.jst.jsf.common.metadata.query.internal.MetaDataQueryHelper.getEntity(MetaDataQueryHelper.java:66) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor$SymbolContribAggregator.create(JSPModelProcessor.java:783) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor$SymbolContribAggregator.access$0(JSPModelProcessor.java:775) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.processSymbolContrib(JSPModelProcessor.java:536) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.processAttributes(JSPModelProcessor.java:526) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.recurseChildNodes(JSPModelProcessor.java:508) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.refreshInternal(JSPModelProcessor.java:494) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.access$3(JSPModelProcessor.java:476) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor$RefreshRunnable.run(JSPModelProcessor.java:449) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2317) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.runOnCurrentThread(JSPModelProcessor.java:413) at org.eclipse.jst.jsf.designtime.internal.jsp.JSPModelProcessor.refresh(JSPModelProcessor.java:365) at org.eclipse.jst.jsf.designtime.internal.symbols.JSPTagVariableSymbolSourceProvider.getSymbols(JSPTagVariableSymbolSourceProvider.java:64) at org.eclipse.jst.jsf.designtime.context.DTJSPExternalContext.doGetMapForScope(DTJSPExternalContext.java:89) at org.eclipse.jst.jsf.designtime.context.AbstractDTExternalContext.getMapForScope(AbstractDTExternalContext.java:48) at org.eclipse.jst.jsf.designtime.context.AbstractDTExternalContext.getApplicationMap(AbstractDTExternalContext.java:82) at org.eclipse.jst.jsf.designtime.el.DefaultDTVariableResolver.resolveVariable(DefaultDTVariableResolver.java:79) at org.eclipse.jst.jsf.designtime.internal.symbols.ConfigBasedDTVariableResolver.resolveVariable(ConfigBasedDTVariableResolver.java:110) at org.eclipse.jst.jsf.designtime.resolver.SymbolContextResolver.getVariable(SymbolContextResolver.java:63) at org.eclipse.jst.jsf.core.internal.contentassist.el.SymbolResolveUtil.getSymbolForVariable(SymbolResolveUtil.java:58) at org.eclipse.jst.jsf.core.internal.contentassist.el.ContentAssistParser$PrefixVisitor.getSymbolInfo(ContentAssistParser.java:184) at org.eclipse.jst.jsf.core.internal.contentassist.el.ContentAssistParser.getSymbolInfo(ContentAssistParser.java:85) at org.eclipse.jst.jsf.ui.internal.jspeditor.JSPSourceUtil.determineSymbolInfo(JSPSourceUtil.java:105) at org.eclipse.jst.jsf.ui.internal.jspeditor.AbstractELHyperlinkDetector.detectHyperlinks(AbstractELHyperlinkDetector.java:70) at org.eclipse.jst.jsf.ui.internal.jspeditor.AbstractELHyperlinkDetector.detectHyperlinks(AbstractELHyperlinkDetector.java:57) at org.eclipse.ui.texteditor.HyperlinkDetectorRegistry$HyperlinkDetectorDelegate.detectHyperlinks(HyperlinkDetectorRegistry.java:81) at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:289) at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:262) at org.eclipse.jface.text.hyperlink.HyperlinkManager.mouseMove(HyperlinkManager.java:457) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:216) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5745) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1427) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:5013) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4507) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:153) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:150) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
it seems IProject.fullPath is null..
