[FLINK-8847] Modules containing package-info.java are always recompiled

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.3.2, 1.4.1, 1.5.0
• Fix Version/s: 1.4.3, 1.5.0
• Component/s: Build System
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 03/Mar/18 19:37
• Updated: 10/Mar/18 12:12
• Resolved: 10/Mar/18 12:12

Description

All modules that contain a package-info.java file (that do not contain annotations which applies to all instances in Flink) will always be recompiled by the maven-compiler-plugin.

To detect modified files the compiler compares timestamps of the source and .class file. In the case of package-info.java no .class file is created if it doesn't contain annotations, which the compiler interprets as a missing .class file.

We can add -Xpkginfo:always to the compiler configuration to force the generation of these files to prevent this from happening.

Issue Links

• is related to: MCOMPILER-209 Incremental compilation doesn't work unless useIncrementalCompilation is set to 'false'
• is related to: MCOMPILER-205 incremental compilation broken for package-info classes
• links to: GitHub Pull Request #5644