[FLUME-2945] Bump java target version to 1.8

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 1.8.0
• Assignee: Lior Zeno
• Reporter: Lior Zeno
• Created: 02/Jul/16 13:35
• Updated: 21/Jun/17 15:14
• Resolved: 20/Jun/17 13:28

Description

We should move to Java 8 as a minimum requirement.

1. Java 7 is EOL'ed http://www.oracle.com/technetwork/java/eol-135779.html.
2. Many projects are adopting java 8 as a minimum requirement, for instance:

• Solr 6: https://issues.apache.org/jira/browse/LUCENE-6722
• Hbase 2: https://issues.apache.org/jira/browse/HBASE-15624
• elasticsearch 5: https://www.elastic.co/guide/en/elasticsearch/reference/master/setup.html

The attached patch was tested on Ubuntu 16.04 with openjdk version "1.8.0_91".
All unit tests, except for the known flaky ones, successfully passed.

Issue Links

• blocks: FLUME-2919 Upgrade the Solr version to 6.0.1
• links to: Review Board