This job ran on our Precise environment, which is in the process of being decommissioned. Please update to a newer Ubuntu version by specifying dist: xenial in your .travis.yml.
The latest one is Ubuntu Xenial 16.04, but I don't think that the support Java 7 on it. Ubuntu Trusty 14.04 is still the default and supports openjdk7 and openjdk8. Oracle JDK 7 is not provided because it reached End of Life in April 2015. Seehttps://docs.travis-ci.com/user/reference/trusty/#jvm-clojure-groovy-java-scala-images
We are getting a warning on our Travis builds:
Supported distribution: https://docs.travis-ci.com/user/reference/overview/#linux
The latest one is Ubuntu Xenial 16.04, but I don't think that the support Java 7 on it. Ubuntu Trusty 14.04 is still the default and supports openjdk7 and openjdk8. Oracle JDK 7 is not provided because it reached End of Life in April 2015. Seehttps://docs.travis-ci.com/user/reference/trusty/#jvm-clojure-groovy-java-scala-images