Liferay Studio 2.2.x won't do the update thing
If you want to try to update your Liferay Studio, you may encounter the following problem:
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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,org.eclipse.egit,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.egit.core,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.egit.doc,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.egit.mylyn.ui,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.egit.ui,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.jgit,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.jgit.archive,3.7.1.201504261725-r
No repository found containing: org.eclipse.update.feature,org.eclipse.egit,3.7.1.201504261725-r
No repository found containing: org.eclipse.update.feature,org.eclipse.egit.mylyn,3.7.1.201504261725-r
No repository found containing: org.eclipse.update.feature,org.eclipse.jgit,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.eclipse.jgit.java7,3.7.1.201504261725-r
No repository found containing: org.eclipse.update.feature,org.eclipse.jgit.java7,3.7.1.201504261725-r
No repository found containing: osgi.bundle,org.slf4j.impl.log4j12,1.7.2.v20131105-2200
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To bypass this problem, try updating the problematic plugin with the marketplace. Search for the plugin and press the update button. This update will work.