Enterprise Manager Grid Control

Posted on 2006-05-17
Medium Priority
Last Modified: 2013-12-03

I get this error from a RAC cluster of 9i databases we have. For some reason the 10g agent although up and fine is reported as being down in EM Grid Control with error message the agent reports ok for only one database in the cluster:

Failed to connect to database instance: ORA-12157: TNS:internal network communication error (DBD ERROR: OCIServerAttach).

Any ideas ?

Question by:hraja77
  • 2
LVL 23

Accepted Solution

paquicuba earned 2000 total points
ID: 16702335
What's your complete 9i version?


Author Comment

ID: 16702699
Hi Paquicba

It is
LVL 23

Expert Comment

ID: 16733735
There are known bugs in earlier releases of 9i related to this type of error, but they don't apply to your version.

Sounds like your SID or SERVICE aren't correct in your TNSNAMES.ORA file.

Can you tnsping your database?

Can you connect to SQL*Plus?


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