Are you receiving the Connection refused error (or) Error: Could not open client transport with JDBC Uri when you try to start the beeline command prompt as part of the Cloudera distribution for Apache Hadoop (CDH) ?
beeline –u jdbc:hive2://localhost:10000
Though the above syntax should work without any problem, this issue still exists in the Cloudera Quickstart VM 5.5 version.
Just put a / at the end of the syntax and the issue goes away. It is an easy solution. So please try to start beeline with the beeline –u jdbc:hive2://localhost:10000/ syntax