我正在尝试安装Eclipse pluginfor Heroku (Eclipse EE Juno SR1)，但遇到以下错误：
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.ning.async-http-client,1.6.5.20120903-0645
No repository found containing: osgi.bundle,org.eclipse.m2e.archetype.common,1.2.0.20120903-0645
No repository found containing: osgi.bundle,org.eclipse.m2e.core,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.core.ui,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.discovery,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.editor,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.editor.xml,1.2.0.20120903-1050
No repository found containing: org.eclipse.update.feature,org.eclipse.m2e.feature,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.jdt,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.launching,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.lifecyclemapping.defaults,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.maven.indexer,1.2.0.20120903-0645
No repository found containing: osgi.bundle,org.eclipse.m2e.maven.runtime,1.2.0.20120903-0645
No repository found containing: osgi.bundle,org.eclipse.m2e.model.edit,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.refactoring,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.eclipse.m2e.scm,1.2.0.20120903-1050
No repository found containing: osgi.bundle,org.jboss.netty,3.2.5.Final-20120903-0645
No repository found containing: osgi.bundle,org.slf4j.api,1.6.4.v20120130-2120
有任何想法吗？