Just for your information, I've just renewed the certificate for ci.bigtop.apache.org in accordance with [1]. Let me know if you find something wrong with it.
[1]: https://cwiki.apache.org/confluence/display/BIGTOP/Bigtop+CI+Setup+Guide#BigtopCISetupGuide-Renewingthecert Kengo Seki <sek...@apache.org>
