All ant commands (afaik) fail for 3.1.x and earlier due to updated maven metadata Nexus 1.9

Borrowed from this page: http://maven.40175.n5.nabble.com/error-while-deploying-a-project-td4312935.html

"Nexus 1.9 is serving up the latest format of maven metadata (see http://jira.codehaus.org/browse/MNG-4452 for some background)

If you update to Maven 2.0.10 then it can handle the additional entries and the problem should go away."

Needed change...

Index: bootstrap/build_includes.xml
===================================================================
— bootstrap/build_includes.xml (revision 25645)
+++ bootstrap/build_includes.xml (working copy)
@@ -29,7 +29,7 @@

<typedef resource="org/apache/maven/artifact/ant/antlib.xml" uri="urn:maven-artifact-ant">
<classpath>

• <pathelement location="${imported.basedir}/lib/maven-ant-tasks-2.0.9.jar" />
  + <pathelement location="${imported.basedir}/lib/maven-ant-tasks-2.0.10.jar" />
  </classpath>
  </typedef>

Index: bootstrap/lib/maven-ant-tasks-2.0.10.jar
===================================================================
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream

Property changes on: bootstrap\lib\maven-ant-tasks-2.0.10.jar
___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream

Index: bootstrap/lib/maven-ant-tasks-2.0.9.jar
===================================================================
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream