android - eclipse android sdk 更新到 v20 破坏了我的安装

Question

我的 AVD 通知我对 v20 进行了更新。但是这样做之后我不能再使用 Eclipse 进行 Android 开发了。

当我尝试使用“帮助”->“检查更新”时:

然后单击下一步 然后我得到如下所示的错误。我看不到找到解决此问题的方法？我不打算卸载 Eclipse 并从头开始。

    An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,com.jcraft.jsch,0.1.46.v201205102330
No repository found containing: osgi.bundle,javax.persistence,2.0.4.v201112161009
No repository found containing: osgi.bundle,javax.servlet,3.0.0.v201112011016
No repository found containing: osgi.bundle,javax.servlet.jsp,2.2.0.v201112011158
No repository found containing: osgi.bundle,org.apache.ant,1.8.3.v20120321-1730
No repository found containing: osgi.bundle,org.apache.commons.lang,2.6.0.v201205030909
No repository found containing: osgi.bundle,org.eclipse.ant.core,3.2.400.v20120523-1752
No repository found containing: osgi.bundle,org.eclipse.ant.launching,1.0.200.v20120530-1204
No repository found containing: osgi.bundle,org.eclipse.ant.ui,3.5.300.v20120523-1752
No repository found containing: osgi.bundle,org.eclipse.compare,3.5.300.v20120522-1148
No repository found containing: osgi.bundle,org.eclipse.compare.core,3.5.200.v20120522-1148
No repository found containing: osgi.bundle,org.eclipse.compare.win32,1.0.200.v20120522-1148
No repository found containing: osgi.bundle,org.eclipse.core.commands,3.6.1.v20120521-2329
No repository found containing: osgi.bundle,org.eclipse.core.contenttype,3.4.200.v20120523-2004
No repository found containing: osgi.bundle,org.eclipse.core.databinding,1.4.1.v20120521-2329
No repository found containing: osgi.bundle,org.eclipse.core.databinding.beans,1.2.200.v20120523-1955
No repository found containing: osgi.bundle,org.eclipse.core.databinding.observable,1.4.1.v20120521-2329
No repository found containing: osgi.bundle,org.eclipse.core.databinding.property,1.4.100.v20120523-1955
No repository found containing: osgi.bundle,org.eclipse.core.expressions,3.4.400.v20120523-2004
No repository found containing: osgi.bundle,org.eclipse.core.externaltools,1.0.100.v20120521-2012
No repository found containing: osgi.bundle,org.eclipse.core.filebuffers,3.5.200.v20120523-1310
No repository found containing: osgi.bundle,org.eclipse.core.filesystem,1.3.200.v20120522-2012
No repository found containing: osgi.bundle,org.eclipse.core.filesystem.win32.x86,1.1.300.v20120522-1137
No repository found containing: osgi.bundle,org.eclipse.core.jobs,3.5.200.v20120521-2346
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No repository found containing: osgi.bundle,org.eclipse.core.runtime.compatibility,3.2.200.v20120521-2346
No repository found containing: osgi.bundle,org.eclipse.core.runtime.compatibility.registry,3.5.100.v20120521-2346
No repository found containing: osgi.bundle,org.eclipse.core.variables,3.2.600.v20120521-2012
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No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity,1.2.5.v201206130431
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No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.oda.design.ui,3.2.7.v201205221153
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.oda.flatfile,3.1.2.v201206121559
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.oda.flatfile.ui,3.1.3.v201203221637
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.oda.profile,3.2.7.v201203291105
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.sqm.core,1.2.5.v201205240353
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.sqm.core.ui,1.2.2.v201205240353
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.sqm.server.ui,1.1.100.v201202021103
No repository found containing: osgi.bundle,org.eclipse.datatools.connectivity.ui,1.2.3.v201205240353
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No repository found containing: osgi.bundle,org.eclipse.datatools.enablement.ibm.db2.luw.ui,1.0.3.v201202100836
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No repository found containing: osgi.bundle,org.eclipse.datatools.enablement.oda.ws,1.2.4.v201203221631
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No repository found containing: osgi.bundle,org.eclipse.datatools.sqltools.editor.core,1.0.2.v201205310904
No repository found containing: osgi.bundle,org.eclipse.datatools.sqltools.parsers.sql.query,1.2.1.v201201250511
No repository found containing: osgi.bundle,org.eclipse.datatools.sqltools.result,1.1.3.v201205310911
No repository found containing: osgi.bundle,org.eclipse.datatools.sqltools.sqlscrapbook,1.0.2.v201205310922
No repository found containing: osgi.bundle,org.eclipse.debug.core,3.7.100.v20120521-2012
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No repository found containing: osgi.bundle,org.eclipse.draw2d,3.8.0.201206112118
No repository found containing: osgi.bundle,org.eclipse.dstore.core,3.3.100.201205300905
No repository found containing: osgi.bundle,org.eclipse.dstore.extra,2.1.400.201205300905
No repository found containing: osgi.bundle,org.eclipse.ecf,3.1.300.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.filetransfer,5.0.0.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.identity,3.1.200.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.provider.filetransfer,3.2.0.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.provider.filetransfer.httpclient,4.0.200.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.provider.filetransfer.httpclient.ssl,1.0.0.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.provider.filetransfer.ssl,1.0.0.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.ecf.ssl,1.0.100.v20120608-0148
No repository found containing: osgi.bundle,org.eclipse.emf,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.ant,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.codegen,2.8.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.codegen.ecore,2.8.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.codegen.ecore.ui,2.8.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.codegen.ui,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.common,2.8.0.v20120606-0717
No repository found containing: osgi.bundle,org.eclipse.emf.common.ui,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.converter,2.5.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.databinding,1.2.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.databinding.edit,1.2.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.ecore,2.8.0.v20120606-0717
No repository found containing: osgi.bundle,org.eclipse.emf.ecore.change,2.8.0.v20120606-0717
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No repository found containing: osgi.bundle,org.eclipse.emf.ecore.edit,2.8.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.ecore.editor,2.8.0.v20120608-0554
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No repository found containing: osgi.bundle,org.eclipse.emf.edit.ui,2.8.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.exporter,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.importer,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.importer.ecore,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.importer.java,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.importer.rose,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore.editor,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore2ecore,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore2ecore.editor,2.5.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore2xml,2.7.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ecore2xml.ui,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.emf.mapping.ui,2.6.0.v20120608-0554
No repository found containing: osgi.bundle,org.eclipse.epp.package.jee,1.5.0.20120131-1544
No repository found containing: osgi.bundle,org.eclipse.equinox.app,1.3.100.v20120522-1841
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No repository found containing: osgi.bundle,org.eclipse.equinox.concurrent,1.0.300.v20120522-2049
No repository found containing: osgi.bundle,org.eclipse.equinox.ds,1.4.0.v20120522-1841
No repository found containing: osgi.bundle,org.eclipse.equinox.event,1.2.200.v20120522-2049
No repository found containing: osgi.bundle,org.eclipse.equinox.frameworkadmin,2.0.100.v20120606-175127
No repository found containing: osgi.bundle,org.eclipse.equinox.frameworkadmin.equinox,1.0.400.v20120428-0117
No repository found containing: osgi.bundle,org.eclipse.equinox.http.jetty,3.0.0.v20120522-1841
No repository found containing: osgi.bundle,org.eclipse.equinox.http.registry,1.1.200.v20120522-2049
No repository found containing: osgi.bundle,org.eclipse.equinox.http.servlet,1.1.300.v20120522-1841
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No repository found containing: osgi.bundle,org.eclipse.equinox.launcher,1.3.0.v20120522-1813
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No repository found containing: osgi.bundle,org.eclipse.equinox.p2.core,2.2.0.v20120430-0525
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.director,2.2.0.v20120524-0542
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.director.app,1.0.300.v20120428-0517
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.discovery,1.0.200.v20120524-1717
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.discovery.compatibility,1.0.101.v20120524-1717
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.engine,2.2.0.v20120501-1502
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.metadata,2.1.0.v20120430-2001
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.metadata.repository,1.2.100.v20120524-1717
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.operations,2.2.0.v20120524-0542
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.publisher,1.2.0.v20120428-0117
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.publisher.eclipse,1.1.0.v20120511-1931
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.reconciler.dropins,1.1.200.v20120301-2145
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.repository,2.2.0.v20120524-1945
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.repository.tools,2.0.100.v20120501-1314
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.touchpoint.eclipse,2.1.100.v20120428-0117
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.touchpoint.natives,1.1.0.v20120524-0542
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.transport.ecf,1.0.100.v20120305-0333
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.ui,2.2.0.v20120524-0542
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.ui.discovery,1.0.0.v20110808-1657
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.ui.importexport,1.0.1.v20110818-1344
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.ui.sdk,1.0.200.v20120515-1650
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.ui.sdk.scheduler,1.1.0.v20110815-1744
No repository found containing: osgi.bundle,org.eclipse.equinox.p2.updatesite,1.0.400.v20120412-1615
No repository found containing: osgi.bundle,org.eclipse.equinox.preferences,3.5.0.v20120522-1841
No repository found containing: osgi.bundle,org.eclipse.equinox.registry,3.5.200.v20120522-1841
No repository found containing: osgi.bundle,org.eclipse.equinox.security,1.1.100.v20120522-1841
No repository found containing: osgi.bundle,org.eclipse.equinox.security.ui,1.1.100.v20120522-2049
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No repository found containing: osgi.bundle,org.eclipse.equinox.simpleconfigurator,1.0.300.v20110815-1744
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No repository found containing: osgi.bundle,org.eclipse.help.base,3.6.100.v201206081400
No repository found containing: osgi.bundle,org.eclipse.help.ui,3.5.200.v20120521-2344
No repository found containing: osgi.bundle,org.eclipse.help.webapp,3.6.100.v20120521-2344
No repository found containing: osgi.bundle,org.eclipse.jdt,3.8.0.v201206081400
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No repository found containing: osgi.bundle,org.eclipse.jdt.compiler.apt,1.0.500.v20120522-1651
No repository found containing: osgi.bundle,org.eclipse.jdt.compiler.tool,1.0.101.v20120522-1651
No repository found containing: osgi.bundle,org.eclipse.jdt.core,3.8.1.v20120531-0637
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No repository found containing: osgi.bundle,org.eclipse.jdt.debug.ui,3.6.100.v20120530-1425
No repository found containing: osgi.bundle,org.eclipse.jdt.doc.user,3.8.0.v20120606-134218
No repository found containing: osgi.bundle,org.eclipse.jdt.junit,3.7.100.v20120523-1543
No repository found containing: osgi.bundle,org.eclipse.jdt.junit.core,3.7.100.v20120523-1257
No repository found containing: osgi.bundle,org.eclipse.jdt.junit.runtime,3.4.300.v20120523-1257
No repository found containing: osgi.bundle,org.eclipse.jdt.junit4.runtime,1.1.200.v20120523-1257
No repository found containing: osgi.bundle,org.eclipse.jdt.launching,3.6.100.v20120523-1953
No repository found containing: osgi.bundle,org.eclipse.jdt.ui,3.8.0.v20120524-1551
No repository found containing: osgi.bundle,org.eclipse.jem,2.0.600.v201201051400
No repository found containing: osgi.bundle,org.eclipse.jface,3.8.0.v20120521-2329
No repository found containing: osgi.bundle,org.eclipse.jface.databinding,1.6.0.v20120521-2329
No repository found containing: osgi.bundle,org.eclipse.jface.text,3.8.0.v20120531-0600
No repository found containing: osgi.bundle,org.eclipse.jpt.common.branding,1.2.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.common.core,1.2.0.v201205240000
No repository found containing: osgi.bundle,org.eclipse.jpt.common.eclipselink.branding,1.2.0.v201203150000
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No repository found containing: osgi.bundle,org.eclipse.jpt.common.utility,2.1.0.v201205020001
No repository found containing: osgi.bundle,org.eclipse.jpt.dbws.eclipselink.branding,1.1.100.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.dbws.eclipselink.ui,1.0.200.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.doc.user,1.4.2.v201205290002
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.branding,1.2.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.core,1.2.0.v201205100000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.core.schemagen,1.0.200.v201203050000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.eclipselink.branding,1.2.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.eclipselink.core,1.2.0.v201204160000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.eclipselink.ui,1.3.0.v201204160000
No repository found containing: osgi.bundle,org.eclipse.jpt.jaxb.ui,1.3.0.v201205180000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.branding,3.2.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.core,3.2.0.v201206110000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.db,2.1.100.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.eclipselink.branding,3.2.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.eclipselink.core,2.2.0.v201205240000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.eclipselink.core.ddlgen,2.1.0.v201203150000
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.eclipselink.ui,2.2.0.v201205020001
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.gen,2.2.0.v201205020001
No repository found containing: osgi.bundle,org.eclipse.jpt.jpa.ui,3.2.0.v201205230001
No repository found containing: osgi.bundle,org.eclipse.jsch.core,1.1.400.v20120522-1148
No repository found containing: osgi.bundle,org.eclipse.jsch.ui,1.1.400.v20120522-1148
No repository found containing: osgi.bundle,org.eclipse.jst.common.frameworks,1.1.600.v201204190200
No repository found containing: osgi.bundle,org.eclipse.jst.common.project.facet.core,1.4.201.v201108161900
No repository found containing: osgi.bundle,org.eclipse.jst.common.ui,1.0.200.v201202020230
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No repository found containing: osgi.bundle,org.eclipse.jst.j2ee,1.1.600.v201205170400
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No repository found containing: osgi.bundle,org.eclipse.jst.j2ee.jca,1.1.600.v201111012200
No repository found containing: osgi.bundle,org.eclipse.jst.j2ee.navigator.ui,1.1.600.v201203142300
No repository found containing: osgi.bundle,org.eclipse.jst.j2ee.ui,1.1.600.v201205170400
No repository found containing: osgi.bundle,org.eclipse.jst.j2ee.web,1.1.600.v201203142300
No repository found containing: osgi.bundle,org.eclipse.jst.jee,1.0.500.v201202020745
No repository found containing: osgi.bundle,org.eclipse.jst.jee.ui,1.0.500.v201205170400
No repository found containing: osgi.bundle,org.eclipse.jst.jsf.core,1.4.0.v201205241050
No repository found containing: osgi.bundle,org.eclipse.jst.jsf.facelet.core,1.0.200.v201205161442
No repository found containing: osgi.bundle,org.eclipse.jst.jsf.facesconfig,1.2.100.v2012030703072246
No repository found containing: osgi.bundle,org.eclipse.jst.jsf.facesconfig.ui,1.2.100.v201201111516
No repository found containing: osgi.bundle,org.eclipse.jst.jsf.ui,1.3.200.v201202131530
No repository found containing: osgi.bundle,org.eclipse.jst.jsp.core,1.2.500.v201203071954
No repository found containing: osgi.bundle,org.eclipse.jst.jsp.ui,1.1.700.v201204260100
No repository found containing: osgi.bundle,org.eclipse.jst.pagedesigner,1.3.200.v2012030703072246
No repository found containing: osgi.bundle,org.eclipse.jst.pagedesigner.jsp.core,1.2.100.v201112111111
No repository found containing: osgi.bundle,org.eclipse.jst.server.core,1.2.302.v20120503_1042
No repository found containing: osgi.bundle,org.eclipse.jst.server.preview.adapter,1.1.200.v20120517_1442
No repository found containing: osgi.bundle,org.eclipse.jst.server.tomcat.core,1.1.400.v20120418_1501
No repository found containing: osgi.bundle,org.eclipse.jst.server.tomcat.ui,1.1.300.v20120420_1012
No repository found containing: osgi.bundle,org.eclipse.jst.servlet.ui,1.1.600.v201202011057
No repository found containing: osgi.bundle,org.eclipse.jst.ws,1.0.600.v201108242234
No repository found containing: osgi.bundle,org.eclipse.jst.ws.annotations.core,1.2.0.v201203272107
No repository found containing: osgi.bundle,org.eclipse.jst.ws.axis.consumption.ui,1.0.700.v201204181727
No repository found containing: osgi.bundle,org.eclipse.jst.ws.axis.creation.ui,1.0.750.v201204120428
No repository found containing: osgi.bundle,org.eclipse.jst.ws.consumption,1.0.700.v201204102147
No repository found containing: osgi.bundle,org.eclipse.jst.ws.consumption.ui,1.1.500.v201204102147
No repository found containing: osgi.bundle,org.eclipse.jst.ws.creation.ui,1.0.700.v201205041550
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.consumption.core,1.0.200.v201201312103
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.consumption.ui,1.0.200.v201201312103
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.core,1.1.0.v201205012246
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.creation.core,1.0.200.v201205012246
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.creation.ui,1.0.200.v201204221838
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.doc.user,1.0.200.v201205231944
No repository found containing: osgi.bundle,org.eclipse.jst.ws.cxf.ui,1.0.200.v201203062228
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxrs.core,1.0.400.v201202152223
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxrs.ui,1.0.500.v201205020140
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.core,1.0.200.v201204172145
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.doc.user,1.0.200.v201205231938
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.dom.integration,1.0.200.v201109042201
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.dom.runtime,1.0.200.v201109042201
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.ui,1.0.200.v201204221614
No repository found containing: osgi.bundle,org.eclipse.jst.ws.jaxws.utils,1.0.200.v201201032002
No repository found containing: osgi.bundle,org.eclipse.ltk.core.refactoring,3.6.0.v20120523-1543
No repository found containing: osgi.bundle,org.eclipse.ltk.ui.refactoring,3.7.0.v20120523-1543
No repository found containing: osgi.bundle,org.eclipse.mylyn.bugzilla.core,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.bugzilla.ide,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.bugzilla.ui,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.commons.core,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.commons.net,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.commons.screenshots,3.8.0.v20120612-0600
No repository found containing: osgi.bundle,org.eclipse.mylyn.commons.ui,3.8.0.v20120612-0600
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Answer 1

这张票中有提示:https://bugs.eclipse.org/bugs/show_bug.cgi?id=290782

从窗口 -> 首选项 -> 安装/更新 -> 可用软件站点删除所有 url，然后重试更新。