Database Connection Fails With Oracle.ons.NoServersAvailable: Subscription Time Out From a WLS Datasource

(Doc ID 2421344.1)

Last updated on JULY 10, 2018

Applies to:

JDBC - Version 12.2.0.0.0 and later
Information in this document applies to any platform.

Symptoms

On : Thin JDBC driver

We are facing to an enormous issue in our WebLogic Serverfarm after upgrading OWLS from 12.2.1.2.180116 to 12.2.1.3.0 (CPU April).
Several business critical applications are unable to create a connection to our RAC Database.
Database Connection fails with oracle.ons.NoServersAvailable: Subscription time out

It was applied Patch 26045997 (“ENABLING DRIVER FAN WITHOUT RUNNING ONS DAEMONS CAUSES CONNECT REQUEST ERROR”)

Afterwards the connection seems to work, but the error still exists:

ERROR
-----------------------



BUSINESS IMPACT
-----------------------
The issue has the following business impact:
Due to this issue, Application is reporting this error in the log.

Changes

 

Cause

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