See <https://builds.apache.org/job/maven-indexer/org.apache.maven.indexer$indexer-core/181/changes>
- Jenkins build became unstable: maven-indexer » Mave... Apache Jenkins Server
- Jenkins build is still unstable: maven-indexer ... Apache Jenkins Server
- Jenkins build is still unstable: maven-inde... Apache Jenkins Server
- Jenkins build is back to stable : maven... Apache Jenkins Server
