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Troubleshooting Guide for ORA-12537 / TNS-12537 TNS:Connection Closed (Doc ID 555609.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Net Services - Version 9.2.0.8 to 12.2.0.1 [Release 9.2 to 12.2]
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.

Purpose

Aid in diagnosing, explaining and resolving the TNS-12537 or "connection closed" error for local or remote connections.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
References

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