During upgrade, database raised exception 9002, severity 17, state 1. Use the exception number to determine the cause

I am trying to update the **SQL Server 2014** to **Service Pack 3** on my Windows Server Machine. After the updates from Windows update feature I am unable to start the SQL Server service and SQL Server Agent Service. I have checked the Error log for the same and it's showing below 2 messages. > 1. The transaction log for database 'master' is full due to 'CHECKPOINT'. > 2. During upgrade, database raised exception 9002, severity 17, state 1. Use the exception number to determine the cause.