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Viewing file: Select action/file-type: Oracle Universal Connection Pool Release 11.2.0.0.2 (11.2 Beta 2) Production README ======================================================================= Contents Of This Release ------------------------ For all platforms: [ORACLE_HOME]/ucp/lib contains: - ucp.jar Classes for use with JDK 5.0 and JDK 6. It contains the Universal Connection Pool classes, as well as the built-in JDBC Pool Adapter classes for standalone UCP / JDBC applications. Javadoc / Documentation / Demo: All of the above are also available for download on OTN. Installation ------------ The Oracle Installer puts the Universal Connection Pool files in the [ORACLE_HOME]/ucp directory. Setting Up Your Environment --------------------------- On Windows platforms: - Add [ORACLE_HOME]\ucp\lib\ucp.jar to your CLASSPATH. On all Unix platforms: - Add [ORACLE_HOME]/ucp/lib/ucp.jar to your CLASSPATH. Important Notes --------------- * UCP works with older Oracle databases such as 11.1 and 10g databases, as well as non-Oracle databases such as DB2, SQLServer. Please refer to OTN for complete UCP certification information, including JDBC driver and vendor database versions. * UCP's connection affinity features (Web-session based affinity and Transaction based affinity) are designed to work with Oracle Real Application Clusters (RAC) 11.1 or above, since they are designed to leverage features of the 11g RAC database. These UCP features may not work as expected with older RAC versions. * If you are using UCP's Connection Labeling feature, and enabled Fast Connection Failover as well as RAC Load Balancing Advisory, note that UCP's Runtime Connection Load-Balancing (RCLB) takes precedence over connection labeling. In other words, in a RAC enabled environment, UCP's RCLB would provide better performance characteristics than generic Connection Labeling feature. Known Problems/Limitations In This Release ------------------------------------------ * For applications using XA (global transactions) and Fast Connection Failover (FCF), the method isValid() on oracle.ucp.jdbc.ValidConnection may not be optimal in performance when returning from the method. This could happen when using UCP's PoolXADataSource with FCF enabled. This is expected, due to Oracle JDBC bug #7314006. Workaround: This bug does not affect the correctness of the isValid API. The application could choose to check for XAException.XAER_RMERR inside the XAException catch-block instead, to determine a connection's validity. * For applications using the built-in pool adapter PoolDataSource and PoolXADataSource, the pool allows dynamic setting of properties on the specified connection factory, such as connect-URL, host, port, etc., during run-time. However, other than connect-URL, the pool does not refresh itself when setting other connection factory properties. This applies to both standard connection factory properties (for example, those on javax.sql.DataSource including user, password, portNumber, databaseName, etc.), and customized properties specific to a connection factory. Workaround: Application should try to avoid dynamic setting of important connection factory properties, after the pool has been populated with connections. If this can not be avoided, application can explicitly perform pool refresh after all dynamic property set. Problems/Limitations Fixed in This Release ------------------------------------------ BUG-7657258 Incorrect Fast Connection Failover (FCF) outcome recorded after processing service-up event. BUG-7607299 Minor typos in UCP Development Guide. BUG-7504160 UniversalConnectionPoolException: Universal Connection Pool already exists. BUG-7500649 Added support for connecting directly to a named RAC instance. BUG-7499744 Added FCF up-event processing information via getStatistics API. BUG-7449959 When remote ONS setup or instantiation fails, subscription to ONS is no longer attempted. BUG-7448113 Incorrect number of connections processed while tearing down connections during FCF. BUG-7390833 UCP connection proxies cannot be removed from HashMap while used as key. BUG-7390692 JDBC proxies throw exception for methods called on invalid or closed connections. BUG-7355968 Incorrect factory class check in pool subclasses for connections BUG-7316726 Incorrect classloaders used in JDBC proxies. |
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