Deleting singleton object and reconstructing in ruby - ruby-on-rails

Question

I've this situation wherein a singleton class creates object of a model and is used further in my code.
Now, the problem is that occasionally the connection between application and database is broken and all subsequent calls to the singleton fail. While I'm working on fixing the issue, a workaround is required immediately. I believe the solution I'm thinking of, would work but not sure if it will leak memory, cause deadlocks etc.
Here's the original (partial) code:
1 file_path = File.expand_path(File.dirname(__FILE__))
2 require file_path + '/action_factory'
3 require 'erb'
4
5 class Manager
6
7 def initialize(logger)
8 #logger = logger
9 end
10
11 def log_exception(e,method_name)
12 #logger.log :ERROR,"Manager",method_name,'',$$,'',e.backtrace[0] + ": Uncaught Exception " + e.message,DateTime.now,'system',''
13 e.backtrace.shift
14 #logger.log :ERROR,"Manager",method_name,'',$$,''," from " + e.backtrace.join("\n from ") + "(" + e.class.to_s + ")",DateTime.now,'system',''
15 end
16 def execute_action
17 return false if addresses.collect{|a| a if !a.to_s.empty?}.compact.empty?
18 begin
19 action = ActionFactory.instance().get_action(type)
20 return true
21 rescue Exception => e
22 action = nil ####### I'm planning to add this line ####
23 log_exception(e,this_method_name)
24 return false
25 end
26 end
27 end
28 require 'singleton'
29 $file_path=File.expand_path(File.dirname(__FILE__))
30 Dir[$file_path + '/actions/*_action.rb'].each { |filename| require filename }
31
32 class ActionFactory
33 include Singleton
34
35 def get_action(type)
36 action_type_obj = ActionType.find(:first, :select => "action_name", :conditions => ["id=?",type])
37 if(action_type_obj.nil? or action_type_obj.action_name.nil?)
38 raise "Undefined Action Type"
39 else
40 return eval("Actions::#{action_type_obj.action_name}").instance
41 end
42 end
43 end
The problem is that oracle connection is disconnected sometimes and the statement #36 fails returning InvalidStatement exception. All subsequent calls of the statement 19 fail.
I'm planning to add a statement : action = nil in the exception block in line 22. Will that suffice as a workaround or would it bring more issues like memory leakages, deadlocks etc?
If there is a better solution, I'll be glad to hear.
Thanks