Sometimes You can get ” ORA-12542: TNS:address already in use ” error.
Details of error are as follows.
ORA-12542: TNS:address already in use Cause: Specified listener address is already being used. Action: Start your listener with a unique address. ns main err code: 12542 TNS-12542: TNS:address already in use ns secondary err code: 12560 nt main err code: 512 TNS-00512: Address already in use nt secondary err code: 48 nt OS err code: 0
To solve this error, decrease the value for TIME_WAIT state.
Or you should use of IPC protocol, If the application or failing connection is local to the Database, use IPC for connectivity, instead of TCP.
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