Issue was first discovered, when I saw Alarms on MCS. Then, I followed the documentation at : https://community.mapr.com/docs/DOC-1202, to gather information from system. Node was working fine after stop-start in EC2 console but then after few hours again it was crashed.
Please let me know, what is wrong with cluster. I have also attached "System logs" taken from EC2 console.
Since there is limit to attachment size, I am uploading support-dumps in MapR Big Data - Google Drive.
All the support dumps taken are after the crash and stop-start instance from EC2 console, as then only I could ssh into node and ran scripts.
I will delete Drive contents after few days, once someone acknowledges.