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Thursday, 22 March 2012

ORA-12640: Authentication adapter initialization failed


Sometimes when starting the database with the system user you will face this issue the above error message written in ORADIM.LOG

Solution:
  1. Modify SQLNET.ORA
  2. Start database with SQLplus after the service is restarted.
  3. Start the service as specific users.
Modify SQLNET.ORA, either by removing the line
sqlnet.authentication_services=(NTS)
or by changing it to
sqlnet.authentication_services=(NONE)

Start the database manually after the Oracle database service has started, using
SQL*Plus and connecting as SYSDBA.

Start Service as a Specific User
Choose Start > Settings > Control Panel > Services.
Or Type in RUN “services.msc” to open the services dialog box.
Select the service and right click on this
Select Logon select this account
Specify the username and corresponding password.

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