See <https://builds.apache.org/job/Ant-Build-Matrix-master-Windows/jdk=JDK%201.8.0_121%20(unlimited%20security)%2064-bit%20Windows%20only,label_exp=Windows/74/display/redirect?page=changes>
- Jenkins build became unstable: Ant-Build-Matrix-mas... Apache Jenkins Server
- Jenkins build is back to stable : Ant-Build-Mat... Apache Jenkins Server