HDP2.6以后的版本，部署hdp后，falcon的web ui警告无法访问，是因为没有指定一个jdbc驱动，解决办法：
# wget –O je-5.0.73.jar http://search.maven.org/remotecontent?filepath=com/sleepycat/je/5.0.73/je-5.0.73.jar#mv remotecontent?filepath=com%2Fsleepycat%2Fje%2F5.0.73%2Fje-5.0.73.jar /usr/share/je-5.0.73.jar#ambari-server setup --jdbc-db=bdb --jdbc-driver=/usr/share/je-5.0.73.jar#ambari-server restart再重启falcon服务
参考：https://www.ibm.com/developerworks/library/l-digital-business-start-trial/