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UCP Connection Pool Returns “No Valid Connection Available” During Intermittent Network Outages (Doc ID 1930432.1)

Last updated on MARCH 08, 2017

Applies to:

Universal Connection Pool - Version 11.2.0.4.0 and later
Information in this document applies to any platform.

Symptoms

When using the 12.1.0.1 or 12.1.0.2 UCP and JDBC driver, when network outages intermittently occur, the following error is returned:
 


This happens in place of a more descriptive / useful error indicating a network interruption or an "unable to connect to the database" type of error message.
This also happens instead of any attempt to create new valid connections.

This may also happen with UCP 11.2.0.4.

Cause

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