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Screen Shot hereI'm trying to enable archivelog mode in Oracle database. For that I shutdown the services and used startup mount. Instead of database getting mounted, I'm getting error ORA- 12528 TNS - All instances are blocking new connections.

Any one can guide on this.

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    Use a local connection: sqlplus / as sysdba. What you tried will not work without static listener registration. – Balazs Papp Nov 18 at 10:21
  • as a work around you can try a local connection to the database if this is possible. connect to the server and connect using sqlplus and 'connect / as sysdba' – miracle173 Nov 18 at 10:30
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in which state your database was at the point you issue the shutdown command? Maybe the unregister in listener was incomplete. try:

  1. stop database

    shutdown immediate

  2. restart listener

    lsnrctl restart

  3. start database

    startup mount

  • sorry, but that is wrong, Besides that , how should one issue a "shutdown immediate" if one cannot connect to the database – miracle173 Nov 18 at 10:28
  • you dont need a listener for os authentification as sysdba. Connect as sysdba shoud be possible – MarcelS Nov 18 at 10:31
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    I know, but the OP is not able to connect to the database to to do a "startup mount", so why do you think he is able to connect to the database to do a "shutdow immediate"? – miracle173 Nov 18 at 10:47
  • db is already shutdown.. so listener restart could be help. – MarcelS Nov 18 at 11:09

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