Symptoms:
When an automatic step completes a task, updating the cost model sometimes results in a database deadlock.
Resolution:
You can fix this issue by deploying the update to WorldServer 11.1.1, available on FTP.
If you cannot deploy it, connect to the Customer Support Web Portal and log a case. You need an account to log a case. If you do not have an account, contact your company's SDL Support Account Administrator.