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https://issues.apache.org/jira/browse/HIVE-13264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15201213#comment-15201213
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Damien Carol commented on HIVE-13264:
-------------------------------------
[~nithinmahesh] you modified thrift protocol in your patch ?...
Adding *TProtocolVersion.HIVE_CLI_SERVICE_PROTOCOL_V9* is a little bit
intrusive IMHO.
> JDBC driver makes 2 Open Session Calls for every open session
> -------------------------------------------------------------
>
> Key: HIVE-13264
> URL: https://issues.apache.org/jira/browse/HIVE-13264
> Project: Hive
> Issue Type: Bug
> Components: JDBC
> Reporter: NITHIN MAHESH
> Assignee: NITHIN MAHESH
> Labels: jdbc
> Attachments: HIVE-13264.1.patch, HIVE-13264.2.patch, HIVE-13264.patch
>
>
> 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.
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