Welcome to the forum @sudhir2016 and thanks for adding your profile picture. It helps build community! We're glad you're here. When you get a chance, please introduce yourself on this forum thread.
What AWS AMI and what EC2 size are you using? Also, it will be hard to troubleshoot without knowing all the steps taken before that particular error message and a more complete log. Are you able to try and again and note down each step you take as you go?