ruby on rails uses too much memory on undefined method - ruby-on-rails

Question

I have a problem on my ruby on rails application. It uses too much memory whenever it encounters an undefined method. It freezes the server until I kill the process. Error log points to the undefined method that goes to something like this:
ActionView::Template::Error (undefined method `testos' for #<#:0x007fb3d88de8c8>):
Is there any way or configuration to fix this? I am using ruby 1.9.3 on rails 3.2.2.
Here is the stack trace
Completed 500 Internal Server Error in 53960ms
ActionView::Template::Error (undefined method testos' for #<#<Class:0x007fb3d43d0420>:0x007fb3d479c8d8>):
77: #rules["data"].each do |rule|
78: json_rule =ActiveSupport::JSON.decode(rule["json_rule"])
79: %>
80: <%=testos(1)%>
81: <div class="dvGridRow" style="width:100%;padding-bottom:10px;">
82: <div class="dvGridData" style="vertical-align:top;width:190px;margin-left:5px;">
83: <%= json_rule["rule_name"]%>
app/views/rules/index.html.erb:80:inblock in _app_views_rules_index_html_erb_4146358986539966513_70205169705180'
app/views/rules/index.html.erb:77:in each'
app/views/rules/index.html.erb:77:in
_app_views_rules_index_html_erb_4146358986539966513_70205169705180'
Rendered /Users/jay/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_trace.erb (6.4ms)
cache: [GET /manage/rules] miss
Rendered /Users/jay/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.8ms)
Rendered /Users/jay/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (18.5ms)
note:
I intentionally called an unidentified method, because I am trying to figure out where does my code freezes the machine, and that error causes it.
Thanks

Answer 1

A Problem (and a Solution)
Let’s say your working with a Ruby object. And let’s also say that you aren’t entirely familiar with this object. And let’s also say that you call a method that doesn’t exist on the object.
o = Object.new
o.some_method
NoMethodError: undefined method `some_method' for #
This is less than desirable, so Ruby has an awesome way of allowing us to rescue ourselves from this. Check this out:
class OurClass
def method_missing (method_name)
puts "there's no method called '#{method_name}'"
end
end
o = OurClass.new
o.some_method
=> there's no method called 'some_method'
We can create a method called method_missing in our class. If the object we’re calling the method on doesn’t have the method (and doesn’t inherit the method from another class or module), Ruby will give us one more chance to do something useful: if the class has a method_missing method, we’ll hand the information about the method cal to method_missing and let it sort the mess out.
Well, that’s great; we’re no longer getting an error message.
reference from this link
http://net.tutsplus.com/tutorials/ruby/ruby-for-newbies-missing-methods/