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ORA-03114: not connected to ORACLE When connecting from 12c Linux client

edited Oct 26, 2017 5:00AM in Database Administration (MOSC) 6 commentsAnswered

I am having an issue connecting from a 12c(12.1 or 12.2) Linux client to our 12.1.0.2 Linux database. 

I can connect successfully but when I run any command I get ORA-03114:

[xyz@logging ~]$  sqlplus xyz/xyz@ouxyz3

SQL*Plus: Release 12.2.0.1.0 Production on Tue Aug 1 11:35:20 2017

Copyright (c) 1982, 2016, Oracle.  All rights reserved.

Last Successful login time: Tue Aug 01 2017 11:29:19 -04:00

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and Real Application Testing options

SQL> select 1 from dual
  2  /
ERROR:
ORA-03114: not connected to ORACLE

The error occurs on all of our Linux 12c clients when using SQLPLUS.  Works fine from 11.2 Linux client, 12c clients on windows and SQLDeveloper.

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