My Oracle Support Banner

Primary Note: Troubleshooting steps for ORA-03113 Error (Doc ID 1506805.1)

Last updated on SEPTEMBER 04, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Net Services - Version and later
Information in this document applies to any platform.


An ORA-3113 "end of file on communication channel" error is a general error usually reported by a client process connected to an Oracle database. The error basically means 'I cannot communicate with the Oracle shadow process'. As it is such a general error more information must be collected to help determine what has happened - this error by itself does not indicate the cause of the problem. For example, ORA-3113 could be signaled for any of these following scenarios:

This article describes what information to collect for an ORA-3113 error. It is common for this error to be accompanied by other errors such as:

These are all symptomatic of being disconnected from Oracle.

This note is an updated version of archived
<Note 17613.1> - ORA-03113 on Unix - What Information to Collect
For older information, please refer to <Note 17613.1>


Troubleshooting Steps

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
Troubleshooting Steps
 (A)  ORA-3113 when attempting to STARTUP Oracle
 A1)  Errors connecting as SYSDBA or on startup nomount
 A2)  Errors Mounting the database
 (B)  ORA-3113 attempting to connect to the database using Oracle Net
 (C)  Client sees ORA-3113 running SQL / PLSQL
 (D)  Server trace reports ORA-3113
 (E)  Additional Checks / Information

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.