According to codehaus there are 2 main reasons for this error when running a Maven goal – “This error indicates that Maven is either unable to access the required plug-in from your local repository, or unable to access the official or ‘central’ Maven2 plug-in repository“.
Most of the time this can be resolved by either:
If you [...]
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How many times have I seen this – ‘artifact org.apache.maven.plugins:maven-resources-plugin’ could not be retrieved from repository’ blah blah blah. I usually resolve this by re-running the commands over and over until the artifact does get resolved. Today though I thought enough was enough.
After a little digging about I discover that the plugins attached to lifecycle phases [...]
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Eclipse: Galileo 3.5
Plugin: Maven2
I have several projects in Eclipse all dependency managed by Maven. The dependencies are correctly declared in the POM’s but there is 1 project that will not resolve the projects it depends on. Expanding the Maven Dependencies node in the Eclipse Project Explorer does not list the projects declared in the om, althoughall external libraries seem to be resolved ok.

I discovered that in the .classpath file I had this in the offending POM:
<classpathentry kind=”con” path=”org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER/modules”>
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