[LUCENE-6740] Reduce warnings emitted by javac in Java 7/Java 8

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 6.0
• Labels: Java7 Java8
• Lucene Fields: New
• Assignee: Uwe Schindler
• Reporter: Uwe Schindler
• Created: 15/Aug/15 10:30
• Updated: 28/Aug/22 14:41

Description

This is a overview issue about improvements to reduce warnings during the build. Since we moved trunk to Java 8 and branch_5x to Java 7, there were introduced some additional warnings, mostly in generated code.

ANTLR4 does automatically add the needed @SuppressWarnings, but jflex does not. There are also some rawtypes warnings, which changed in Java 7 (before Java 7 there were only "unsafe" warnings, now you need both.

I enabled the Warnings tracker in Policeman Jenkins, we can therefore very easily check the warnings: e.g. on trunk: http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/ (see diagram on the right), you can click on it, e.g. http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/warnings4

Issue Links

• contains: LUCENE-6741 Ant regenerate fails to be no-op on 5.x