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From "Kathey Marsden (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-1459) Early load of Derby driver with JDBC 4.0 autoloading can lead to derby properties not being processed or derby boot time actions consuming resources when a connection is made with another driver
Date Tue, 27 Jun 2006 18:22:29 GMT
Early load of Derby driver with JDBC 4.0 autoloading can lead to derby properties not being
processed or derby boot time actions consuming resources when a connection is made with another
driver
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

         Key: DERBY-1459
         URL: http://issues.apache.org/jira/browse/DERBY-1459
     Project: Derby
        Type: Bug

  Components: JDBC, Services  
    Versions: 10.2.0.0    
 Environment: JDK 1.6 
    Reporter: Kathey Marsden
    Priority: Critical
     Fix For: 10.2.0.0


The addition of support for autoloading of Derby drivers, DERBY-930, caused two potentially
serious regresions for applications.


1) Early load of driver can mean that  derby system properties, such as derby.system.home
may not be processed by the driver because they are set after the driver is loaded.

2) Early load of the driver can mean boot time operations, such as starting network server
with derby.drda.startNetworkServer can happen even when Derby is never used if a connection
is made to another database such as Oracle.


The attached file autoloading_scenarios.html  shows scenarios that show these regressions
plus another case that will regress if boot time operations are moved to the first Derby embedded
connection.   I don't know what solution is available that would handle all three cases.





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