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Validating our web site as a project kicks out this stack trace: !ENTRY org.eclipse.core.resources 4 1 2010-09-08 13:51:27.093 !MESSAGE Internal Error !STACK 1 org.eclipse.core.runtime.CoreException: No file system is defined for scheme: http at org.eclipse.core.internal.filesystem.Policy.error(Policy.java:55) at org.eclipse.core.internal.filesystem.Policy.error(Policy.java:50) at org.eclipse.core.internal.filesystem.InternalFileSystemCore.getFileSystem(InternalFileSystemCore.java:65) at org.eclipse.core.internal.filesystem.InternalFileSystemCore.getStore(InternalFileSystemCore.java:107) at org.eclipse.core.filesystem.EFS.getStore(EFS.java:470) at org.eclipse.core.internal.localstore.FileSystemResourceManager.findLinkedResourcesPaths(FileSystemResourceManager.java:129) at org.eclipse.core.internal.localstore.FileSystemResourceManager.allPathsForLocationNonCanonical(FileSystemResourceManager.java:120) at org.eclipse.core.internal.localstore.FileSystemResourceManager.allPathsForLocation(FileSystemResourceManager.java:57) at org.eclipse.core.internal.localstore.FileSystemResourceManager.allResourcesFor(FileSystemResourceManager.java:198) at org.eclipse.core.internal.resources.WorkspaceRoot.findFilesForLocationURI(WorkspaceRoot.java:112) at org.eclipse.core.internal.resources.WorkspaceRoot.findFilesForLocationURI(WorkspaceRoot.java:103) at org.eclipse.wst.common.componentcore.internal.util.ComponentResolver.recalculateFile(ComponentResolver.java:58) at org.eclipse.wst.common.componentcore.internal.util.ComponentResolver.resolve(ComponentResolver.java:120) at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:68) at org.eclipse.wst.xml.core.internal.validation.XMLValidator._internalResolveEntity(XMLValidator.java:560) at org.eclipse.wst.xml.core.internal.validation.XMLValidator$MyEntityResolver.resolveEntity(XMLValidator.java:523) at org.apache.xerces.impl.XMLEntityManager.resolveEntity(Unknown Source) at org.apache.xerces.impl.xs.XMLSchemaLoader.resolveDocument(Unknown Source) at org.apache.xerces.impl.xs.traversers.XSDHandler.resolveSchema(Unknown Source) at org.apache.xerces.impl.xs.traversers.XSDHandler.constructTrees(Unknown Source) at org.apache.xerces.impl.xs.traversers.XSDHandler.parseSchema(Unknown Source) at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source) at org.apache.xerces.impl.xs.XMLSchemaValidator.findSchemaGrammar(Unknown Source) at org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source) at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(Unknown Source) at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.eclipse.wst.xml.core.internal.validation.XMLValidator.validate(XMLValidator.java:346) at org.eclipse.wst.xml.core.internal.validation.eclipse.Validator.validate(Validator.java:73) at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validate(AbstractNestedValidator.java:276) at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validate(AbstractNestedValidator.java:82) at org.eclipse.wst.validation.Validator$V2.validate(Validator.java:1159) at org.eclipse.wst.validation.internal.ValManager.validate(ValManager.java:704) at org.eclipse.wst.validation.internal.ValManager$1.visit(ValManager.java:665) at org.eclipse.wst.validation.internal.ValManager.accept(ValManager.java:810) at org.eclipse.wst.validation.internal.ValManager.validate(ValManager.java:669) at org.eclipse.wst.validation.internal.ValBuilderJob$Visitor.visit(ValBuilderJob.java:299) at org.eclipse.core.internal.resources.Resource$2.visit(Resource.java:112) at org.eclipse.core.internal.resources.Resource$1.visitElement(Resource.java:64) at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:82) at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86) at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86) at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86) at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86) at org.eclipse.core.internal.watson.ElementTreeIterator.iterate(ElementTreeIterator.java:127) at org.eclipse.core.internal.resources.Resource.accept(Resource.java:74) at org.eclipse.core.internal.resources.Resource.accept(Resource.java:110) at org.eclipse.core.internal.resources.Resource.accept(Resource.java:94) at org.eclipse.wst.validation.internal.ValBuilderJob.fullBuild(ValBuilderJob.java:219) at org.eclipse.wst.validation.internal.ValBuilderJob.run(ValBuilderJob.java:178) at org.eclipse.wst.validation.internal.ValBuilderJob.runInWorkspace(ValBuilderJob.java:126) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) The URI resolver framework is calling ComponentResolver without an IFile but with a base location string beginning with http:// . As that there's no way to check for a suitable filesystem provider without having the CoreException, and there is not a provider offered by default, I'm going to just turn off that bit of code.
Left open even though the fix has been in the stream since late 2010.
