Database Link Accessed Remotely Fails with ORA-12154, Locally Works
(Doc ID 1593961.1)
Last updated on SEPTEMBER 08, 2023
Applies to:
Oracle Net Services - Version 10.2.0.1 to 18.3.0.0.0 [Release 10.2 to 18.1]Information in this document applies to any platform.
Symptoms
After connecting remotely or via the listener to a source or origin database and then attempting to select across a dblink, the following error occurs:
ORA-12154: TNS:could not resolve the connect identifier specified.
In other words, you establish a connection via the listener, to an instance where a dblink is created.
Sqlplus <username>/<password>@TNS_alias
Then you issue a select across the dblink like:
SQL>select * from dual@db_link_name;
This yields the ORA-12154 error.
However, when you connect locally to the same origin database, you cannot reproduce this failure using the same link name.
Set ORACLE_SID=<mysid>
Sqlplus <username>/<password>
SQL>select * from dual@db_link_name;
--> works
Changes
This may be a new database link or the $TNS_ADMIN environment variable may have been changed recently.
Cause
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In this Document
Symptoms |
Changes |
Cause |
Solution |
References |