How do you cleanly uninstall the Eclipse MapReduce plugin?

Question

I'm trying to get the eclipse plugin for hadoop development to work, I'm using hadoop 0.18.3. I installed the old MapReduce plugin (http://www.alphaworks.ibm.com/tech/mapreducetools) on Eclipse v3.5.2 (M20100211-1343) by copying it to /Applications/eclipse/plugins and restarting eclipse but that didn't work, I figured it was because it was developed for older versions of hadoop and eclipse (circa 2007). Then I realized that the hadoop distribution has a jar under contrib/eclipse-plugin - so copied that to /Application/eclipse/plugins and restarted... then things got funky. So I tried to remove them both so I could start over but that fails, when I go to 'Window -> Open Perspective -> Other' there's a "ghost" of the old plugin ... no icon, it just says '' (literally surrounded by angle brackets).

I can't seem to revert eclipse to a clean prior state - I'm tempted to just start over with a fresh eclipse install but that'd be a lot of work (installing other plugins like git and pydev plus re-creating the workspace). So how do you cleanly uninstall the Eclipse MapReduce plugin?

Alternatively: how do I get the eclipse hadoop plugin properly installed, connected to the local tasktracker and development HDFS for hadoop 0.18.3?

Answer 1

I know nothing about hadoop and mapreduce, but you should look at the features folder as well as plugins. Anyway, that should be the only places that well-behaved plugins install themselves. But did you say that you dropped a file into plugins? Then there shouldn't be anything else to do.

I've never heard of contrib/eclipse-plugin, where is that? Not in the eclipse folder I think; I've never seen it.

It is possible that you should start eclipse with -clean, but that's not supposed to be needed any more with 3.5. Alternately you could try with a new workspace, which you don't like, but it would start with new metadata and that would tell you it was the metadata and not code in the plugins directory.