我有一台运行Ubuntu 14的虚拟机，我下载了版本：Luna Service Release 2（4.4.2）。我从/ opt / eclipse文件夹中以root身份运行eclipse。添加安装URL后 http://e-p-i-c.sf.net/updates 然后在组件安装过程中弹出以下错误。这个错误是什么？我该如何解决？
An error occurred while collecting items to be installed
session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,org.eclipse.egit,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.egit.core,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.egit.doc,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.egit.mylyn.ui,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.egit.ui,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.jgit,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.eclipse.jgit.archive,4.0.1.201506240215-r
No repository found containing: org.eclipse.update.feature,org.eclipse.egit,4.0.1.201506240215-r
No repository found containing: org.eclipse.update.feature,org.eclipse.egit.mylyn,4.0.1.201506240215-r
No repository found containing: org.eclipse.update.feature,org.eclipse.jgit,4.0.1.201506240215-r
No repository found containing: osgi.bundle,org.slf4j.impl.log4j12,1.7.2.v20131105-2200