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"The Network Adapter could not establish the connection" Intermittent Closed Connection From WebLogic Application to DB Server (Doc ID 2716830.1)

Last updated on MAY 09, 2023

Applies to:

Oracle WebLogic Server - Version 12.1.1.0 and later
Information in this document applies to any platform.

Symptoms

Intermittent closed connection from application(WebLogic) and DB server.   Most of applications can work normally and only part of applications impacted.

Some Data Source changed to "Suspend" status when exception occurred. But ping to database server and telnet to database server work normally on WebLogic machine.  It is confirmed that DB server still keep "running".

WebLogic Log:

 

Cause

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In this Document
Symptoms
Cause
Solution


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