I noticed that HIVE-9538.patch has a and b prefixes. https://issues.apache.org/jira/secure/attachment/12695792/HIVE-9538.patch It was built by Jenkins successfully...
https://issues.apache.org/jira/browse/HIVE-9538 Also, Review Board allows to upload patches only with a,b prefixes now. If a,b prefixes are required now How to Contribute wiki should be updated https://cwiki.apache.org/confluence/display/Hive/HowToContribute#HowToContribute-CreatingaPatch
