With streaming on, closed client connections cause Fatal Broken Pipe errors

Once we turned streaming on on www.songkick.com, we started getting
these
errors on production quite a bit. (See below)

It appears that if the client closes the connection during the rendering
of
the template, the next attempt to write a portion of the page to the
connection will fail with a Broken Pipe error, understandably. Rails
catches this and turns it into a ActionView::Template::Error.

So these are benign errors, but I’d like to stop them happening or
silence
them.

  1. Where can we register a handler in Rails (3.2) to process template
    errors?
  2. Should the StreamingTemplateRenderer be catching these broken pipe
    errors and suppressing them, perhaps with a “Request Aborted” log line?

thanks
Dan

Error follows:

FATAL skweb( Rails::ActionController): ActionView::Template::Error
(Broken pipe):

44:     <%= shared_component('site_header', @page.site_header) %>


45:     <%= shared_component(@page.site_navigation.component_name,

@page.site_navigation) %>

46:     <div id="page">


47:       <%= yield %>


48:     </div>


49:     <%= shared_component('footer', :static) %>


50:     <!-- after footer -->

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/unicorn-4.3.1.2/lib/unicorn/http_response.rb:41:in
`write’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/unicorn-4.3.1.2/lib/unicorn/http_response.rb:41:in
`block in http_response_write’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/lint.rb:523:in
`block in each’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/chunked.rb:28:in
`block in each’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_view/buffers.rb:31:in
`call’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_view/buffers.rb:31:in
safe_concat' /home/dan/dev/skweb/app/views/layouts/application.html.erb:47:in_app_views_layouts_application_html_erb__3293108995857455051_100497760’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_view/template.rb:145:in
`block in render’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/notifications.rb:125:in
`instrument’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_view/template.rb:143:in
`render’

/home/dan/dev/skweb/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_view/renderer/streaming_template_renderer.rb:73:in
`block (2 levels) in delayed_render’

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