fails after running for some time

gistfile1.txt

/opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-dashboard-0.9.9/lib/sensu-dashboard/server.rb:185:in `load': no object read at line 1, column 1 [load.c:1073] (Oj::ParseError)
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-dashboard-0.9.9/lib/sensu-dashboard/server.rb:185:in `block (2 levels) in <class:Server>'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/em/deferrable.rb:151:in `call'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/em/deferrable.rb:151:in `set_deferred_status'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/em/deferrable.rb:191:in `succeed'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/client.rb:113:in `unbind'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/client.rb:71:in `on_request_complete'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/http_connection.rb:126:in `block in post_init'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/http_connection.rb:141:in `call'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/http_connection.rb:141:in `<<'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/http_connection.rb:141:in `receive_data'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/em-http-request-1.0.3/lib/em-http/http_connection.rb:23:in `receive_data'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run_machine'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-dashboard-0.9.9/lib/sensu-dashboard/server.rb:36:in `run'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-dashboard-0.9.9/bin/sensu-dashboard:10:in `<top (required)>'
        from /opt/sensu/bin/sensu-dashboard:23:in `load'
        from /opt/sensu/bin/sensu-dashboard:23:in `<main>'