Troubleshooting ORA-12547 TNS: Lost Contact
(Doc ID 555565.1)
Last updated on JANUARY 16, 2025
Applies to:
Oracle Database - Standard Edition - Version 10.2.0.5 to 10.2.0.5 [Release 10.2]Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.2.0.1 [Release 12.1 to 12.2]
Oracle Net Services - Version 10.2.0.5 to 12.2.0.1 [Release 10.2 to 12.2]
Oracle Database - Enterprise Edition - Version 10.2.0.5 and later
Oracle Cloud Infrastructure - Exadata Cloud Service - Version N/A and later
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 |