server hangs and never ever responds in multiple image upload on S3.

[hardiksondagar]

In single file upload all working fine but when I'm uploading multiple file using Model::saveAll() it's just hangs and not responding anything.
I'm using Ubuntu 14.10 on EC2.

I found some questions regarding curl hanging os on stackoverflow ( like http://stackoverflow.com/questions/2828559/how-can-i-figure-out-why-curl-is-hanging-and-unresponsive ) . My issues is related to that or something else