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ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

edited Jan 9, 2013 5:32PM in Oracle Weblogic Server (MOSC) 3 commentsAnswered
 Hi,
I'm getting in WebLogic Managed Server log file the following error:
Error creating the sql connection for serverType  oracle_thin
java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
 
In database server log I see that the SID received is null.
09-JAN-2013 19:45:56 * (CONNECT_DATA=(SID=null)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=null))) * (ADDRESS=(PROTOCOL=tcp)
 
The Oracle database/listener is up at the time of the error.

Do you have any idea why this error occurred when the db and listener is up?
Maybe a network issue?

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