[rvm-research] Error building the MMTk test harness

I am following the guides located in the
http://jikesrvm.org/Care+and+Feeding section of the website, and have
gotten the RVM configured and built, but when I got to the
http://jikesrvm.org/The+MMTk+Test+Harness guide, and ran the ant
mmtk-harness command, I got the following error:

Buildfile: /home/csse/trash-man/jikesrvm/build.xml

compile-vmmagic-stub:

compile-options:
    [mkdir] Created dir:
/home/csse/trash-man/jikesrvm/target/options/classes
    [javac] Compiling 10 source files to
/home/csse/trash-man/jikesrvm/target/options/classes

compile-mmtk:

ensure-javacc:

prepare-ant-tasks:
    [mkdir] Created dir: /home/csse/trash-man/jikesrvm/target/tasks/classes
    [javac] Compiling 16 source files to
/home/csse/trash-man/jikesrvm/target/tasks/classes
    [javac] Note:
/home/csse/trash-man/jikesrvm/tools/ant-tasks/src/org/jikesrvm/tools/template/GenerateFromTemplate.java
uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
Trying to override old definition of task truncate

ensure:
     [echo] javacc does not exist or is of the wrong version. Rebuilding...

prepare-ant-tasks:

init-javacc-properties:

fetch:
    [mkdir] Created dir: /home/csse/trash-man/jikesrvm/components/javacc/4.0
     [echo] Downloading (no cache available)
      [get] Getting:
http://java.net/projects/javacc/downloads/download/oldversions/javacc-4.0.zip
      [get] To:
/home/csse/trash-man/jikesrvm/components/javacc/4.0/javacc-4.0.zip
      [get]
http://java.net/projects/javacc/downloads/download/oldversions/javacc-4.0.zip
moved
to
https://java.net/projects/javacc/downloads/download/oldversions/javacc-4.0.zip
      [get]
https://java.net/projects/javacc/downloads/download/oldversions/javacc-4.0.zip
moved
tohttp://java.net/downloads/javacc/oldversions/javacc-4.0.zip

BUILD FAILED
/home/csse/trash-man/jikesrvm/build.xml:442: The following error occurred
while executing this line:
/home/csse/trash-man/jikesrvm/build/components/javacc.xml:50: The following
error occurred while executing this line:
/home/csse/trash-man/jikesrvm/build/components/base.xml:70: The following
error occurred while executing this line:
/home/csse/trash-man/jikesrvm/build/components/base.xml:76: The following
error occurred while executing this line:
/home/csse/trash-man/jikesrvm/build/components/javacc.xml:40: The following
error occurred while executing this line:
/home/csse/trash-man/jikesrvm/build/components/base.xml:110: The following
error occurred while executing this line:
/home/csse/trash-man/jikesrvm/build/components/base.xml:118: Redirection
detected from https to http. Protocol switch unsafe, not allowed.

I am running this on a Ubuntu 12.10 x32 machine, running OpenJDK 1.6. If
there is any more information I can provide, please let me know.

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