Blocked/waiting UCP Threads In UCP

(Doc ID 1935869.1)

Last updated on MARCH 08, 2017

Applies to:

JDBC - Version to [Release 11.2]
Universal Connection Pool - Version to [Release 11.2]
Information in this document applies to any platform.


Application is unable to use the UCP threadpool after a recent upgrade to JDBC and UCP Database version is
Thread pool is at maximum capacity (24 in this case) due to waiting tasks, and UCP results in not allowing any further connections.

The issue occurs when Fast Connection Failover (FCF) is enabled.



Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms