title: maven install error in eclipse juno
body: <p>While I am tring to install maven in eclipse juno I got this error.
  error details:</p>
  
  <pre><code>Multiple annotations found at this line:
      - Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (execution: default-compile, phase: 
       compile)
      - CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.5.1 or one of its dependencies could not be resolved: 
       Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.5.1: ArtifactResolutionException: The repository system is offline but the 
       artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 is not available in the local repository.
      - Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile (execution: default-testCompile, 
       phase: test-compile)
  </code></pre>
  
  <p>please help me if knows proper answer.</p>
  
  <p>thanks </p>