[Rails] Intermittent "Application Failed to start" errors

[softwareengineer 99]

In my project everything is working fine except from time to time I keep getting the error: "Application failed to start".
  
  After refreshing, the error goes away.
  
  Why I am getting this error and what's the best way to avoid it?
  
  Thanks
  Frank
  P.S. I am using Apache 2 with dispatcher.fcgi on RHEL 3
  
		
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