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After upgrading to WebLogic Server 12.2.1.4, Certain Functions that Read CLOB Data Throw: "java.sql.SQLException: Connection has already been closed" error (Doc ID 2693946.1)

Last updated on JULY 24, 2020

Applies to:

Oracle WebLogic Server - Version 12.2.1.4.0 and later
Information in this document applies to any platform.

Goal

After upgrading to Weblogic 12.2.1.4, certain functions (for example length() and getCharacterStream()) that read CLOB data are throwing java.sql.SQLException: Connection has already been closed errors.

Stack Trace that is seen: 


Disabling "Wrap Data Types" for the datasource fixes the error, but what has changed after upgrading the application from WLS 12.2.1.2 to WLS 12.2.1.4?

Solution

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In this Document
Goal
Solution
References


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