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.caucho.hessian,3.2.0
No repository found containing: osgi.bundle,javax.persistence,2.0.1.v201006031150
No repository found containing: osgi.bundle,javax.transaction,1.1.1.v201006150915
No repository found containing: osgi.bundle,org.eclipse.dltk.core,2.0.0.v20100603-0936
No repository found containing: osgi.bundle,org.eclipse.dltk.debug,2.0.0.v20091110-1532
No repository found containing: osgi.bundle,org.eclipse.dltk.formatter,2.0.0.v20100304-1959
No repository found containing: osgi.bundle,org.eclipse.dltk.launching,2.0.0.v20100524-0038
No repository found containing: osgi.bundle,org.eclipse.dltk.ruby.core,2.0.0.v20100524-0038
No repository found containing: osgi.bundle,org.eclipse.dltk.ruby.formatter,2.0.0.v20100212-1450
No repository found containing: osgi.bundle,org.eclipse.dltk.ruby.ui,2.0.0.v20100524-0038
No repository found containing: osgi.bundle,org.eclipse.dltk.ui,2.0.0.v20100603-0936
No repository found containing: osgi.bundle,org.eclipse.net4j.jms.api,3.0.0.v20100614-1655
No repository found containing: osgi.bundle,org.eclipse.net4j.spring,0.7.1.v200610271244
No repository found containing: osgi.bundle,org.eclipse.net4j.util,3.0.0.v20100614-1655
No repository found containing: osgi.bundle,org.eclipse.persistence.antlr,2.1.0.v20100614-r7608
No repository found containing: osgi.bundle,org.eclipse.persistence.asm,2.1.0.v20100614-r7608
No repository found containing: osgi.bundle,org.eclipse.persistence.core,2.1.0.v20100614-r7608
No repository found containing: osgi.bundle,org.eclipse.persistence.jpa,2.1.0.v20100614-r7608
我用的是Eclipse jee版本
------解决方案--------------------
用classic版本试试，没用过jee版本
------解决方案--------------------
ADT很多依赖的插件都没有，强力建议使用J2SE版本的Eclipse
------解决方案--------------------
1、 进入help->software updates
2、 点击manage sites
3、 Remove掉所有的已有站点
4、 返回到software updates and add-ons页面，重新创建站点并update
------解决方案--------------------
重新下一个eclipse 3.+开头的得了。
------解决方案--------------------
删除了重新来一遍，可能是你中间某个环节出错了