Connection Labelling Cannot Be Used With PoolXADataSource from Universal Connection Pool Resulting in Null Connection
(Doc ID 1573094.1)
Last updated on MARCH 19, 2025
Applies to:
JDBC - Version 11.2.0.3.0 to 11.2.0.3.0 [Release 11.2]Universal Connection Pool - Version 11.2.0.3.0 to 11.2.0.3.0 [Release 11.2]
Information in this document applies to any platform.
Symptoms
With version 11.2.0.3 of the Thin JDBC driver and Universal Connection Pool (UCP), using PoolXADataSource from Universal Connection Pool returns NULL connection when ConnectionLabellingCallback is called.
A database connection should be returned when using PoolXADataSource.
To check if you are seeing this problem, you can try running the following standalone Java program:
If you are seeing the problem, then the output from the program will look like:
$ java -cp .:ojdbc6.jar:ucp.jar LabelTest
----------------
using dataSource
----------------
'configure' called
requestedLabels: {IMPORTANT_FEATURE=DESIRED_VALUE}
connection: $Proxy0@4036afc5
------------------
using xaDataSource
------------------
'configure' called
requestedLabels: {IMPORTANT_FEATURE=DESIRED_VALUE}
connection: null
The connection for XADataSource is NULL. This is incorrect behaviour.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |