[HIVE-13264] JDBC driver makes 2 Open Session Calls for every open session

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.1, 2.0.1
• Fix Version/s: 2.1.1, 2.2.0
• Component/s: JDBC
• Labels: jdbc
• Hadoop Flags: Reviewed
• Tags: jdbc
• Assignee: NITHIN MAHESH
• Reporter: NITHIN MAHESH
• Created: 11/Mar/16 02:46
• Updated: 08/Dec/16 14:39
• Resolved: 10/Jun/16 18:28

Description

When HTTP is used as the transport mode by the Hive JDBC driver, we noticed that there is an additional open/close session just to validate the connection.

TCLIService.Iface client = new TCLIService.Client(new TBinaryProtocol(transport));
TOpenSessionResp openResp = client.OpenSession(new TOpenSessionReq());
if (openResp != null)

{ client.CloseSession(new TCloseSessionReq(openResp.getSessionHandle())); }

The open session call is a costly one and should not be used to test transport.