Mal noch etwas zur Niveausteigerung in diesem Forum!
Seit meinem letzten Beitrag hat das doch sehr nachgelassen.
Auch die "Moderatoren" tragen nicht mehr zur Steigerung bei

Was ist eigentlich aus dem Weinkeller geworden?
Symptom:
When starting server manager the following error is generated:
ORA-12560: TNS
rotocol adapter error occurred
Cause:
Oracle classify this as a ‘generic protocol adapter error’. In my experience it indicates that Oracle client does not know what instance to connect to or what TNS alias to use.
Possible Remedies:
*
If running on the server (or workstation) that is running the database (i.e. if the database is local to the machine) then try explicitly setting ‘ORACLE_SID’. e.g.
set ORACLE_SID=<sid>
and then try again. If this works then consider whether to make the change permanent by specifying it as a system variable.
*
(Possibly 8.1.5 and later
If running on the server (or workstation) that is running the database then check that the service name ‘OracleService<SID>’ ties up with the actual database SID. If the database SID is changed without recreating the service then this can lead to this error. To recreate the service:
oradimxx -delete -sid <old-sid>
oradimxx -new -sid <SID> -intpwd <internal-password> AUTO -pfile <full-init-ora-filename>
*
Try setting the environment variable ‘LOCAL’ to the required connection alias (typically the database SID) and then try again. Do be sure that the application that is being used picks up the new environment variable setting. Setting this to an invalid connection alias will typically produce ORA-12154: TNS:could not resolve service name.
*
Ignore the error and try connecting by specifying explicitly which connection alias to use.
*
Check that the network connection between the client computer and the server has not failed. From the client try pinging the server. (For general guidance on troubleshooting general network connectivity problems click here.)
Brian Brooks (Encorus Technologies, USA) has highlighted a problem with DHCP. If the database server has its IP address dynamically allocated by DHCP then its IP address may change. This is not likely to be a problem on a local network where DNS will take care of name resolution issues, but where the database server is on a remote network and its IP address needs to be explicitly specified in the client's lmhosts file then this can be a problem because it requires periodic updates to the client's lmhosts file. If faced with this scenario then push to get the database server allocated a permanent IP address.
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