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Could not resolve artifact javax.servlet:servlet-api:jar:2.5
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org.eclipse.core.runtime.CoreException: Could not resolve artifact javax.servlet:servlet-api:jar:2.5	at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:776)	at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:1)	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)	at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:743)	at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:720)	at com.google.cloud.tools.eclipse.util.MavenUtils.resolveArtifact(MavenUtils.java:133)	at com.google.cloud.tools.eclipse.appengine.libraries.repository.MavenHelper.resolveArtifact(MavenHelper.java:46)	at com.google.cloud.tools.eclipse.appengine.libraries.repository.M2RepositoryService.resolveArtifact(M2RepositoryService.java:54)	at com.google.cloud.tools.eclipse.appengine.libraries.repository.LibraryClasspathContainerResolverService.resolveLibraryFileAttachSourceSync(LibraryClasspathContainerResolverService.java:208)	at com.google.cloud.tools.eclipse.appengine.libraries.repository.LibraryClasspathContainerResolverService.resolveLibraryAttachSourcesSync(LibraryClasspathContainerResolverService.java:107)	at com.google.cloud.tools.eclipse.appengine.localserver.ServletClasspathProvider.doResolveClasspathContainer(ServletClasspathProvider.java:73)	at com.google.cloud.tools.eclipse.appengine.localserver.ServletClasspathProvider.resolveClasspathContainer(ServletClasspathProvider.java:52)	at org.eclipse.jst.server.core.RuntimeClasspathProviderDelegate.resolveClasspathContainerImpl(RuntimeClasspathProviderDelegate.java:133)	at org.eclipse.jst.server.core.internal.RuntimeClasspathProviderWrapper.resolveClasspathContainerImpl(RuntimeClasspathProviderWrapper.java:155)	at org.eclipse.jst.server.core.internal.RuntimeClasspathContainer.getClasspathEntries(RuntimeClasspathContainer.java:77)	at org.eclipse.jdt.internal.ui.packageview.ClassPathContainer.getChildren(ClassPathContainer.java:135)	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getContainerPackageFragmentRoots(PackageExplorerContentProvider.java:372)	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getChildren(PackageExplorerContentProvider.java:298)	at org.eclipse.jdt.internal.ui.navigator.JavaNavigatorContentProvider.getChildren(JavaNavigatorContentProvider.java:171)	at org.eclipse.jdt.ui.StandardJavaElementContentProvider.hasChildren(StandardJavaElementContentProvider.java:241)	at org.eclipse.jdt.internal.ui.navigator.JavaNavigatorContentProvider.hasChildren(JavaNavigatorContentProvider.java:159)	at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.hasChildren(SafeDelegateTreeContentProvider.java:112)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.callNormalHasChildren(NavigatorContentServiceContentProvider.java:444)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.access$4(NavigatorContentServiceContentProvider.java:439)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider$3.run(NavigatorContentServiceContentProvider.java:407)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.hasChildren(NavigatorContentServiceContentProvider.java:392)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.hasChildren(NavigatorContentServiceContentProvider.java:436)	at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2131)	at org.eclipse.jface.viewers.TreeViewer.isExpandable(TreeViewer.java:553)	at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2169)	at org.eclipse.jface.viewers.AbstractTreeViewer.updatePlus(AbstractTreeViewer.java:2861)	at org.eclipse.jface.viewers.TreeViewer.updatePlus(TreeViewer.java:804)	at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:844)	at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:818)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:791)	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:611)	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:762)	at org.eclipse.jface.viewers.AbstractTreeViewer.handleTreeExpand(AbstractTreeViewer.java:1493)	at org.eclipse.jface.viewers.TreeViewer.handleTreeExpand(TreeViewer.java:903)	at org.eclipse.jface.viewers.AbstractTreeViewer$4.treeExpanded(AbstractTreeViewer.java:1505)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:132)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4230)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1491)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1514)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1499)	at org.eclipse.swt.widgets.TreeItem.sendExpand(TreeItem.java:1036)	at org.eclipse.swt.widgets.Tree.expandItem_expandChildren(Tree.java:1256)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5955)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:227)	at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1121)	at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2066)	at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1113)	at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2571)	at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2034)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5692)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:227)	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2130)	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2337)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5756)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5193)	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5342)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3695)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	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:380)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)	at org.eclipse.equinox.launcher.Main.run(Main.java:1515)	at org.eclipse.equinox.launcher.Main.main(Main.java:1488)