Very High Network out in ec2 instance

Posted by Jatin on Server Fault See other posts from Server Fault or by Jatin
Published on 2014-06-11T09:12:58Z Indexed on 2014/06/11 9:26 UTC
Read the original article Hit count: 273

Filed under:

linux

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ubuntu

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networking

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amazon-ec2

I launched an ubuntu-14.04-64bit instance in Amazon EC2 two days back. And I started Tomcat 7.0.54 in that instance and deployed my application war files. It has no other software installed other than tomcat and the default ones. In the past 2 days, its shows 858 GB of Data Transfer(Network Out) from that instance. I have attached a graph of Amazon CloudWatch Metric "Network Out"

enter image description here

My application does not do any data download/upload. Its a Java Spring application and the front end is in HTML&Javascript. My application traffic was very low (less than 20 hits) in those 2 days.

Is there a way to find out why these data transfers happened and also to find what data has been transferred. If you can see in graph, network out was 20gb per minute.

Some more info: Network in was negligible CPU Utilization was very high Everything else was low

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