Ant targets "eclipse-files" and "javadoc" fail

% ant eclipse-files
Buildfile: build.xml

...

eclipse-files:
     [echo] Using hadoop version 0.20.0

BUILD FAILED
/Users/carl/Projects/hd6/hive-trunk/build.xml:278: taskdef class org.apache.hadoop.hive.ant.GetVersionPref cannot be found

Total time: 2 seconds
%

% ant javadoc
...

  [javadoc] Constructing Javadoc information...
  [javadoc] javadoc: warning - Multiple sources of package comments found for package "org.apache.commons.logging"
  [javadoc] javadoc: warning - No source files for package org.apache.hadoop.hive.ql.util.typedbytes
  [javadoc] Standard Doclet version 1.6.0_15
  [javadoc] Building tree for all the packages and classes...
  [javadoc] java.lang.OutOfMemoryError: Java heap space
  [javadoc] 	at com.sun.org.apache.xerces.internal.util.XMLChar.<clinit>(XMLChar.java:52)
  [javadoc] 	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipDeclSpaces(XMLEntityScanner.java:2105)
  [javadoc] 	at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:197)
  [javadoc] 	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)