You may get below error when trying to connect to the database using sqlplus or through an application login. ORA-12518: TNS:listener could not hand off client connection Reason: The process of handing off a client connection to another process failed. Solution; Increase PROCESSES initialization parameter. Use the following command to check the value of the PROCESSES initialization parameter: show parameter processes; If the database was started using an spfile, then the following command can be used to increase the PROCESSES initialization parameter: alter system set processes=600 scope=spfile; If the database was started using a pfile, then the value of the processes parameter must be changed in the pfile and the database bounced.
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