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Editorial Team
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Asked: 2026-05-26T21:12:59+00:00

We are currently using Spring JDBC with connection pool implementation from DBCP to connect

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We are currently using Spring JDBC with connection pool implementation from DBCP to connect to TAF supportred ORACLE 11g2 server.

connection string used is

jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS_LIST 
                     =(LOAD_BALANCE=ON)(FAILOVER=ON)(ADDRESS = (PROTOCOL = TCP)(HOST = **IP1**)(PORT 
                     = 1521))(ADDRESS = (PROTOCOL = TCP)(HOST = IP2)(PORT = 1521)))(CONNECT_DATA 
                     =(SERVER = DEDICATED)(SERVICE_NAME = **service_name**)(FAILOVER_MODE=(TYPE=select)(METHOD=basic))))

When querying v$session to verify failover type ,failover method . It is showing both to none.
enter image description here

What should be done to set failover_type and failover_method to SELECT and BASIC respectively.
enter image description here

Is there any invalid settings in connection string please suggest.
Thanks in advance.

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1 Answer

  1. Editorial Team

    The 11.2 oracle jdbc documentation says
    “Transparent Application Failover (TAF) is a feature of the Java Database Connectivity (JDBC) Oracle Call Interface (OCI) driver”
    your connection string is:
    jdbc:oracle:thin:
    So in order to enable TAF you should use the jdbc OCI driver not the thin one. I never used the jdbc OCI driver but I suppose you must install the standard native oracle client or the instant client.

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