Generating Javadoc
  Javadoc execution
  Loading source files for package org.apache.commons.cache.adt...
  Loading source files for package org.apache.commons.cache.remote...
  Loading source files for package org.apache.commons.cache.tagext...
  Constructing Javadoc information...
  javadoc: Error fetching URL: http://java.sun.com/products/jdk/1.4/docs/api/package-list
  Standard Doclet version 1.4.2-p6
  Generating target/docs/apidocs/constant-values.html...
  Copying file /home/dirkv/.maven/cache/maven-javadoc-plugin-1.7/plugin-resources/stylesheet.css to file target/docs/apidocs/stylesheet.css...
  Building tree for all the packages and classes...
  src/java/org/apache/commons/cache/remote/CacheRequest.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  src/java/org/apache/commons/cache/remote/CacheResponse.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  src/java/org/apache/commons/cache/remote/CacheRequest.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  src/java/org/apache/commons/cache/remote/CacheResponse.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  Building index for all the packages and classes...
  src/java/org/apache/commons/cache/remote/CacheRequest.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  Building index for all classes...
  src/java/org/apache/commons/cache/remote/CacheResponse.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  src/java/org/apache/commons/cache/remote/package.html: warning - Tag @link: reference not found: org.apache.commons.cache
  src/java/org/apache/commons/cache/remote/package.html: warning - Tag @link: reference not found: com.apache.commons.cache.server
  src/java/org/apache/commons/cache/tagext/package.html: warning - Tag @link: reference not found: org.apache.commons.cache
  src/java/org/apache/commons/cache/adt/ListableObject.java:57: warning - @param argument "the" is not a parameter name.
  src/java/org/apache/commons/cache/adt/WListableObject.java:57: warning - @param argument "the" is not a parameter name.
  src/java/org/apache/commons/cache/remote/CacheRequest.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  src/java/org/apache/commons/cache/remote/CacheResponse.java:28: warning - Tag @link: reference not found: org.apache.commons.cache.server.CacheServer
  Generating target/docs/apidocs/help-doc.html...
  1 error
  13 warnings