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    Oracle Error ORA-12522: TNS:listener could not find available instance with given INSTANCE_ROLE

    admin November 30, 2024 No Comments

    Oracle Error Message

    ORA-12522: TNS:listener could not find available instance with given INSTANCE_ROLE

    Reason for the Error

    There are not any available and appropriate database instances registered with the listener, that are part of the service identified by SERVICE_NAME given in the connect descriptor and that have the specified INSTANCE_ROLE (and INSTANCE_NAME, if specified).

    Solution

    Check to make sure that the INSTANCE_ROLE specified is correct. Run “lsnrctl services” to ensure that the instance(s) have registered with the listener and that they are ready to accept connections.

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