[FLINK-12516] Update Travis base image from trusty to xenial

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.0
• Fix Version/s: 1.9.0
• Component/s: Travis
• Labels: pull-request-available
• Assignee: Nico Kruber
• Reporter: Nico Kruber
• Created: 15/May/19 11:23
• Updated: 16/May/19 08:11
• Resolved: 16/May/19 08:11

Description

Currently, our Travis tests are running with a trusty environment which is officially not supported by Ubuntu anymore. It also brings old system libraries which blocks unit tests for FLINK-11579.

I propose to update to xenial (Ubuntu 16.04 LTS) which is still supported until 2021-04.

Since Travis doesn't support oraclejdk8 on xenial, however, this also implies a switch to openJDK 8.

Issue Links

• blocks: FLINK-12517 Run network tests with dynamically-linked openSSL
• blocks: FLINK-12518 Run e2e tests with openSSL
• links to: GitHub Pull Request #8448