title: maven-javadoc-plugin breaks mvn release:perform
body: <p>I'm trying to execute <code>mvn release:perform</code> on three projects that I have released to our Nexus server <em>many</em> times in the past. Suddenly today, for no apparent reason, all releases are failing to execute goal <code>org.apache.maven.plugins:maven-javadoc-plugin:2.10:jar (attach-javadocs)</code>.</p>
  
  <p>With full stack tracing and debug logging turned on (<code>-e</code> and <code>-X</code>), I see several hundred lines of errors about missing packages:</p>
  
  <pre><code>...    
  package org.apache.http does not exist
  package org.slf4j does not exist
  package org.joda.time does not exist
  ...
  </code></pre>
  
  <p>However, all of these packages are in both my local repository and Nexus server. Moreover, I don't get any of these errors from <code>mvn clean install</code>, and all the projects (Java web apps) actually launch from Intellij without issues—so clearly I'm not actually missing hundreds of packages.</p>
  
  <p>What could be preventing <code>mvn release:perform</code> from finding these packages when <code>mvn clean install</code> and <code>mvn release:prepare</code> don't have any problems?</p>