After activating incrementals for all my plugins maven seems to produce very often corrupt configuration files for SpotBugs, PMD, and so on. This did not happen without incrementals. These configuration files are part of a jar file (dependency for each static analysis tool) and unpacked automatically before the analysis tool is started in maven.

Examples:

• http://jenkins-ci.361315.n4.nabble.com/Incrementals-and-static-analysis-configuration-from-a-dependency-td5011947.html
• https://ci.jenkins.io/job/Plugins/job/jquery3-api-plugin/job/parent-pom/3/console