Here the steps to restore the Jenkins installation after a ports upgrade by @asfinfra
1. Do the following as root on lucene.zones.apache.org:
portsnap update (or extract if that fails)
2. For each of the following ports, change into its home directory and run make deinstall; make clean install :
3. Copy script-js.jar and js.jar from /home/uschindler/ to the jre/lib/ext/ directory under both /usr/local/openjdk6/ and /usr/local/openjdk7/. This allows tests using scripting to run under Jenkins.