Local Connections Work, Connecting Via Listener To The Database Fails With ORA-01034 ORA-27101
(Doc ID 375688.1)
Last updated on NOVEMBER 06, 2017
Applies to:Oracle Net Services - Version 10.2.0.1 to 184.108.40.206 [Release 10.2 to 11.2]
Oracle Net Services - Version 220.127.116.11 to 18.104.22.168 [Release 12.1]
Information in this document applies to any platform.
On a system with multiple IP addresses, when we connect with sqlplus locally on the server (i.e. "sqlplus user/password") everything is OK, but connecting through a TNS alias, either from the network or locally on the server, we get the the following errors:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4 Error: 2: No such file or directory
May be triggered by:
- SID_LIST_<listener> changes in LISTENER.ORA
- Listener port/host reconfiguration
- Using (IP=FIRST) in LISTENER.ORA
- Database startup scripts changes
- Oracle user environment changes
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