How to fix the Oracle error ORA-12042: cannot alter job_queue_processes in single process mode?

In this post, you’ll learn more about the Oracle ErrorORA-12042: cannot alter job_queue_processes in single process mode with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12042: cannot alter job_queue_processes in single process mode

Reason for the Error ORA-12042: cannot alter job_queue_processes in single process mode

An attempt was made to alter job_queue_processes in single process mode.

How to fix the Error ORA-12042: cannot alter job_queue_processes in single process mode ?

You can fix this error in Oracle by following the below steps

Do not attempt to set job_queue_processes in single process mode.