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Does primary key = unique index + not null?
How should we know?
We don't even know what third party library you are talking about.
Have t you tried to put out in the same directory as you would do for tomcat?
Timo
What is the WLS version? WLS doesn't make use of config.xml for third party jars. For JDBC drivers jars refer
Using Third-Party JDBC Drivers with WebLogic Server
For other jars refer
Understanding WebLogic Server Application Classloading - 12c Release 1 (12.1.1)