Question

When I am sending a a GET request to rails server it takes too long time to respond (29 minute)

Below is the log snippet

Log says that there is an error in code, it is ok, but why take so long to respond (1723579 ms) I am unable to find any reason of such kind of behavior. Previously when server was working fine this js request only take 9 ms to respond. but suddenly it started to behave like this. How should i debug the application to trace the root cause of such unexpected behavior.

        Started GET "/my-server/jobs/workers?_=1356363515400" for 27*.*.*.* at 2012-12-24 21:08:35 +0530
    ActionView::Template::Error ():
             1: <% @jobs.each do |job| %>
             2:   $('#cron_<%= job.id %>').attr('data-content', '<%= distance_of_time_in_words_to_now(job.next_fire_info, true) %>');
             3: <% end %>
             4: 
             5: <% @workers.each do |worker| %>
           app/models/job.rb:16:in `next_fire_info'
           app/views/jobs/workers.js.erb:2:in `block in _app_views_jobs_workers_js_erb__101155230_81985760'
           app/views/jobs/workers.js.erb:1:in `_app_views_jobs_workers_js_erb__101155230_81985760'


 Rendered jobs/workers.js.erb (1718348.7ms)

 Completed 500 Internal Server Error in 1723579ms

I am on Rails 3.1.3,
Ruby 1.9.3p194,
MongoDB version v2.2.0, pdfile version 4.5,
32 bit Ubuntu (12.04) with 2 gb ram

Answer 1

Finally i have found the reason for taking so long time to respond. The workers are running periodically based on cron expression.Root cause of this particular issue is one cron expression for job was entered erroneously. that’s why at the time of executing “distance_of_time_in_words_to_now” took too much time.