Errno::ECONNREFUSED - Connection refused - connect(2): while uploading image in Rails 3.1.13

When I tried to upload an image, I am getting the below error in the log:

[paperclip] Saving attachments. [paperclip] saving report_photos/original/2.jpg (0.4ms) rollback transaction Completed 500 Internal Server Error in 948ms

Errno::ECONNREFUSED - Connection refused - connect(2):
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/net/http.rb:763:in initialize'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/net/http.rb:763:in open'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/net/http.rb:763:in block in connect'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/timeout.rb:69:in timeout'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/timeout.rb:100:in timeout'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/net/http.rb:763:in connect'
/home/abcuser/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/net/http.rb:756:in do_start'
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app/controllers/photos_controller.rb:56:in block in form_upload'
app/controllers/photos_controller.rb:55:ineach'
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script/rails:6:inrequire' script/rails:6:in `'

Started POST "/__better_errors/98360080/variables" for xxx-xxx-xx-xx(ip address)

This is an maintenance project and I am using rvm with Ruby 1.9.3p551 and Rails Rails 3.2.13 and paperclip used for uploads. Please suggest where I went wrong?