I'm seeing an issue where Hiveserver2 fails after about an hour and a half. Looking into the logs, it appears that it is attempting to contact the data node on a random port and is unsuccessful, guessing due to the firewall/security group configuration. This repeats 45 times on 5 different ports before it gives up and shuts down. For example: 2017-07-29 10:54:22,004 INFO [main]: ipc.Client (Client.java:handleConnectionTimeout(870)) - Retrying connect to server: data.node.host/10.x.x.x:39085. Already tried 7 time(s); maxRetries=45 2017-07-29 10:54:38,697 INFO [HiveServer2-Background-Pool: Thread-93]: ipc.Client (Client.java:handleConnectionTimeout(870)) - Retrying connect to server: data.node.host/10.x.x.x:41192. Already tried 2 time(s); maxRetries=3 2017-07-29 10:54:42,024 INFO [main]: ipc.Client (Client.java:handleConnectionTimeout(870)) - Retrying connect to server: data.node.host/10.x.x.x:39085. Already tried 8 time(s); maxRetries=45 We're operating in a rather restrictive environment where every open port must be identified and documented, so up to now we have only opened the ports listed in the documentation for each node. I suspect that wider port ranges are required for the internode connections, but I have been unable to find those documented anywhere. ... View more