Maven nightly snapshot jenkins jobs are broken on multiple workers due to lsof

It looks like multiple workers in the amplab jenkins cannot execute lsof. Example log below:

https://amplab.cs.berkeley.edu/jenkins/view/Spark%20Packaging/job/spark-branch-2.1-maven-snapshots/182/console

spark-build/dev/create-release/release-build.sh: line 344: lsof: command not found
usage: kill [ -s signal | -p ] [ -a ] pid ...
kill -l [ signal ]

I looked at the jobs and it looks like only amp-jenkins-worker-01 works so you are getting a successful build every week or so. Unclear if the snapshot is actually released.