Errno::EIO (Input/output error)

[Matthieu Mary]

Hello everybody,

when running thin, I have very often the following error when requesting a diagram

this lead to crash thin and need to restart thin.

Errno::EIO (Input/output error):
  app/controllers/diagram_controller.rb:95:in `write'
  app/controllers/diagram_controller.rb:95:in `puts'
  app/controllers/diagram_controller.rb:95:in `get_export_info'
  app/controllers/diagram_controller.rb:133:in `generate'
  thin (1.3.1) lib/thin/connection.rb:80:in `pre_process'
  thin (1.3.1) lib/thin/connection.rb:78:in `catch'
  thin (1.3.1) lib/thin/connection.rb:78:in `pre_process'
  thin (1.3.1) lib/thin/connection.rb:53:in `process'
  thin (1.3.1) lib/thin/connection.rb:38:in `receive_data'
  eventmachine (0.12.10) lib/eventmachine.rb:256:in `run_machine'
  eventmachine (0.12.10) lib/eventmachine.rb:256:in `run'
  thin (1.3.1) lib/thin/backends/base.rb:61:in `start'
  thin (1.3.1) lib/thin/server.rb:159:in `start'
  thin (1.3.1) lib/thin/controllers/controller.rb:86:in `start'
  thin (1.3.1) lib/thin/runner.rb:185:in `send'
  thin (1.3.1) lib/thin/runner.rb:185:in `run_command'
  thin (1.3.1) lib/thin/runner.rb:151:in `run!'
  thin (1.3.1) bin/thin:6
  /var/lib/gems/1.8/bin/thin:19:in `load'
  /var/lib/gems/1.8/bin/thin:19

Rendering /var/www/yuml/yuml-business/public/500.html (500 Internal Server Error)

yuml version is business.

Rails 2.3.5

actionmailer (2.3.14)
actionpack (2.3.14)
activerecord (2.3.14)
activeresource (2.3.14)
activesupport (2.3.14)
blankslate (2.1.2.4)
bundler (1.2.3)
daemons (1.1.8)
eventmachine (0.12.10)
haml (3.1.4)
htmlentities (4.3.1)
json (1.6.5)
libxml-ruby (2.3.2)
parslet (1.3.0)
polyglot (0.3.3)
rack (1.1.3)
rails (2.3.14)
rake (10.0.2, 0.9.2)
rdoc (3.12)
RedCloth (4.2.8)
ruby-graphviz (1.0.5)
sqlite3 (1.3.5)
thin (1.3.1)
treetop (1.4.10)

Do you have a soluton for this problem?
Any help will be appreciate

Regards