I just updated ADK and I encountered exactly the same problem (the same version of upgrade) as this guy (Cannot update ADT from 22.3.0. to 22.6.1, no updates were found)
I followed their comments, yet I did not see the dialog mentioned in step 4 (4. You should see a dialog that says "this software is already installed, an update will be performed instead". Clicking ok will lead to 22.6.1 being installed.)
Instead, I have the error message that titled
Problem occurred
It says
Installing Software has encountered a problem. An error occurred while collecting items to be installed
And a chunk of details is followed, which I do not understand (See below). Could someone help? Thx so much
An error occurred while collecting items to be installed session context was:(profile=profile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=). No repository found containing: osgi.bundle,com.android.ide.eclipse.adt,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.adt.package,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.base,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.ddms,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.gldebugger,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.hierarchyviewer,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,com.android.ide.eclipse.traceview,22.6.2.v201403212031-1085508 No repository found containing: osgi.bundle,overlay.com.android.ide.eclipse.adt.overlay,22.6.2.v201403212031-1085508 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.adt,22.6.2.v201403212031-1085508 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.ddms,22.6.2.v201403212031-1085508 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.gldebugger,22.6.2.v201403212031-1085508 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.hierarchyviewer,22.6.2.v201403212031-1085508 No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.traceview,22.6.2.v201403212031-1085508
As per jonesw's link https://stackoverflow.com/a/14896322/621481 all you need to do is make sure you have unchecked 'Contact all update sites during install to find required software' from the eclipse install software screen.
I recently had a problem very similar to this. And the answer from @ChrisNoldus did not work for me. However I did find this link:
Basically, there seems to be a problem when an available update site doesn't have a trailing '/' in its link.
I did not need to export anything to a file, but simply changed the configurations in Window->Preferences->Install/Update->Available Software Sites
I recently encountered the same problem and marked answer didn't worked for me. I had tried all the possible solutions to fix this error. Finally I found there were 2 workspace of eclipse under C:\Users\Public\Documents ( Neon, Mars). Just delete the folder which you don't want (Suppose you are working on Neon then delete the other folder Mars) and then try installing update.
来源：https://stackoverflow.com/questions/23201685/eclipse-sdk-update-error-an-error-occur-while-collecting-items-to-be-installed