The eclipse of the Map / reduce the plug-in as an exception

?This post last edited by the yx19910102 on 2013-04-16 11:48:06 in the eclipse of the Map / reduce plug-in for LDS location
conduct disconnect after throws the following error

Closing all opened File Systems ...
Exception in thread "Thread-3" java.lang.NoClassDefFoundError: org / apache / hadoop / fs / FileSystem
at org.apache.hadoop.eclipse.dfs.DFSLocationsRoot $ 1.run (DFSLocationsRoot.java: 131)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FileSystem
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal (BundleLoader.java: 501)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass (BundleLoader.java: 421)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass (BundleLoader.java: 412)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass (DefaultClassLoader.java: 107)
at java.lang.ClassLoader.loadClass (ClassLoader.java: 356)
... 1 more
Closing all opened File Systems ...
Exception in thread "Thread-4" java.lang.NoClassDefFoundError: org / apache / hadoop / fs / FileSystem
at org.apache.hadoop.eclipse.dfs.DFSLocationsRoot $ 1.run (DFSLocationsRoot.java: 131)

This is what causes, how to do
I use hadoop1.1.2 eclipse 4.2class version
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introduced package insufficiency
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hadoop-core-Version.jar
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not as long as the introduction of an additional five packs can begin?
jackson the two, commons configure, httpclicent, lang's three Mody
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introduced, looks like there is this error eh
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really is for this reason that looks like the plug-in does not work with reference to the relationship.

need to hadoop-core to extract all the files in the appropriate class location, you can solve the problem.
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Can you elaborate on how to configure the next?