FatalError while creating javadoc (Unable to find package java.lang)

Question

I'm trying to run javadoc in my java project using Eclipse Kepler under Linux but I'm getting this error:

Constructing Javadoc information...
com.sun.tools.javac.util.FatalError: Fatal Error: Unable to find package java.lang in classpath or bootclasspath
    at com.sun.tools.javac.comp.MemberEnter.importAll(MemberEnter.java:137)
    at com.sun.tools.javac.comp.MemberEnter.visitTopLevel(MemberEnter.java:521)
    at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:454)
    at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:400)
    at com.sun.tools.javac.comp.MemberEnter.complete(MemberEnter.java:831)
    at com.sun.tools.javac.code.Symbol.complete(Symbol.java:400)
    at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:782)
    at com.sun.tools.javac.comp.Enter.complete(Enter.java:481)
    at com.sun.tools.javac.comp.Enter.main(Enter.java:459)
    at com.sun.tools.javadoc.JavadocEnter.main(JavadocEnter.java:71)
    at com.sun.tools.javadoc.JavadocTool.getRootDocImpl(JavadocTool.java:180)
    at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:364)
    at com.sun.tools.javadoc.Start.begin(Start.java:162)
    at com.sun.tools.javadoc.Main.execute(Main.java:59)
    at com.sun.tools.javadoc.Main.main(Main.java:49)
javadoc: error - fatal error
1 error

What am I doing wrong?

Answer 1

Try adding rt.jar from JAVA_HOME/lib/ to the bootclasspath. For example :

<plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-javadoc-plugin</artifactId>
        <version>2.9.1</version>
        <configuration>
           <minmemory>256m</minmemory>
           <maxmemory>1024m</maxmemory>
           <!-- error fix -->
           <bootclasspath>${java.home}/lib/rt.jar</bootclasspath>
        </configuration>
        <reportSets>
           <reportSet>
              <reports>
                 <report>aggregate</report>
              </reports>
           </reportSet>
        </reportSets>
     </plugin>