For some time I had this impression that sometimes just copying over stuff to the plugins folder doesn’t necessarily do the trick. So today I found out that there is a cache of jars in eclipse/configuration/org.eclipse.osgi/bundles. It seems like this is updated when doing an installation from an update site. At some point I have got to find out how this really works…
Eclipse caches Jars
One response to “Eclipse caches Jars”
The cache is used to speed up the startup time by caching the registry (and not the jars as you mention).
In case you installed/updates/removed plugins — just start eclipse with -clean argument. That would flush the cache, and recreate it again.
Moreover the folder you mention contains stuff used by OSGi, and not eclipse itself 🙂