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Troubleshooting ORA-12547 TNS: Lost Contact (Doc ID 555565.1)

Last updated on AUGUST 20, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Oracle Net Services - Version 10.2.0.5 to 12.2.0.1 [Release 10.2 to 12.2]
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Oracle Database - Standard Edition - Version 10.2.0.5 to 10.2.0.5 [Release 10.2]
Information in this document applies to any platform.

Purpose

Aid in diagnosing and resolving the TNS-12547 or "lost contact" errors for both local and remote Oracle client connections.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 Bequeath (Local) :
 Remote Connections:
 Listener specific : 
 Permissions:
 Diagnosis :
References

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