Database Connection Fails With Oracle.ons.NoServersAvailable: Subscription Time Out From a WLS Datasource
(Doc ID 2421344.1)
Last updated on JULY 25, 2019
Applies to:JDBC - Version 126.96.36.199.0 and later
Information in this document applies to any platform.
On : Thin JDBC driver
After upgrading WebLogic from 188.8.131.52.180116 to 184.108.40.206.0 (CPU April), several business critical applications are unable to create a connection to a RAC Database.
Database Connection fails with oracle.ons.NoServersAvailable: Subscription time out
Patch 26045997 (“ENABLING DRIVER FAN WITHOUT RUNNING ONS DAEMONS CAUSES CONNECT REQUEST ERROR”) was applied.
Afterwards the connection seems to work, but the error still exists:
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