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From "Bob Tiernay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2444) Add TCP keepalive option for the hive jdbc driver
Date Sun, 18 Jan 2015 00:51:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14281609#comment-14281609
] 

Bob Tiernay commented on HIVE-2444:
-----------------------------------

Any update here?

> Add TCP keepalive option for the hive jdbc driver
> -------------------------------------------------
>
>                 Key: HIVE-2444
>                 URL: https://issues.apache.org/jira/browse/HIVE-2444
>             Project: Hive
>          Issue Type: Improvement
>          Components: JDBC
>    Affects Versions: 0.7.1
>            Reporter: Bob Tiernay
>
> When issuing long running jdbc queries it is quite plausibe that due to stateful firewall
rules connections may be dropped due to inactivity. Having the ability specify this as a jdbc
property would help alleviate this issue when firewall connection inactivity timeouts are
greater than the tcp keepalive time (default of 2 hrs). 
> As a temporary workaround, one can use reflection on the jdbc connection to set this
option:
> {code}
>     public static Connection getHiveConnection() {
>         Connection hiveConnection = // create connection
>         try {
>             Socket socket = getConnectionSocket( hiveConnection );
>             socket.setKeepAlive( true );
>         } catch( SocketException e ) {
>             throw new RuntimeException( e );
>         }
>         return hiveConnection;
>     }
>     private static Socket getConnectionSocket( Connection connection ) {
>         final Field fields[] = connection.getClass().getDeclaredFields();
>         for( int i = 0; i < fields.length; ++i ) {
>             if( "transport".equals( fields[i].getName() ) ) {
>                 try {
>                     fields[i].setAccessible( true );
>                     TSocket transport = (TSocket) fields[i].get( connection );
>                     return transport.getSocket();
>                 } catch( Exception e ) {
>                     throw new RuntimeException( e );
>                 }
>             }
>         }
>         return null;
>     }
> {code}



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