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Connection Pool Starts Growing In Size After Migrating To UCP 19c (Doc ID 2853725.1)

Last updated on AUGUST 09, 2023

Applies to:

Universal Connection Pool - Version 19.7 and later
Information in this document applies to any platform.


After migrating from a third party connection pool to using UCP , it is found that the connection pool is now steadily growing in size until the error "java.sql.SQLException: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use" is encountered.


 The expectation was that by using the property "AbandonConnectionTimeout" with a value of 120, the UCP will monitor the borrowed connections and reclaim them back into the connection pool after a connection has not been used for a specific amount of time.

The is causing the pool size to grow over time leading to the error.


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