[JCLOUDS-1496] Update maven-compiler-plugin for increased JDK compatibility

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.2.0
• Component/s: jclouds-core
• Assignee: Unassigned
• Reporter: Olaf Flebbe
• Created: 11/Apr/19 20:31
• Updated: 07/May/19 09:58
• Resolved: 07/May/19 09:58

Description

The maven-compiler-plugin is referenced in the wrong clause of the pom file.
It should be within <project><build><pluginManagement><plugins>.
(See for instance https://maven.apache.org/plugins/maven-compiler-plugin/usage.html )

Otherwise you will see Nullptr Exceptions for instance with JDK11.

For now I propose to only move the plugin and use current version 3.8.0. Increasing the errorprone module version will trigger a lot of diagnostics in errorprone plugins, which should be dealt seperately.

Doublechecked: Still compiles with java 1.8

Issue Links

• causes: JCLOUDS-1497 Fix jclouds-labs after JCLOUDS-1496
• links to: GitHub Pull Request #25