Could this be related to some tests running in parallel?
https://builds.apache.org/job/PreCommit-HIVE-Build/13209/testReport/org.apa
che.hive.jdbc/TestActivePassiveHA/testManualFailoverUnauthorized/
2018-08-14T04:11:45,837 ERROR [Thread-10] server.HiveServer2: Error
starting Web UI:
java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method) ~[?:1.8.0_102]
...
at org.apache.hive.http.HttpServer.start(HttpServer.java:254)
~[hive-common-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
org.apache.hive.service.server.HiveServer2.start(HiveServer2.java:732)
[hive-service-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hive.jdbc.miniHS2.MiniHS2.start(MiniHS2.java:371)
[hive-it-util-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
