suppress unnecessary error logging for NotFound

services/filestore/app/coffee/FileController.coffee

@@ -29,10 +29,10 @@ module.exports = FileController =
 			logger.log start: range.start, end: range.end, "getting range of bytes from file"
 		FileHandler.getFile bucket, key, options, (err, fileStream)->
 			if err?
-				logger.err err:err, key:key, bucket:bucket, format:format, style:style, "problem getting file"
 				if err instanceof Errors.NotFoundError
 					return res.send 404
 				else
+					logger.err err:err, key:key, bucket:bucket, format:format, style:style, "problem getting file"
 					return res.send 500
 			else if req.query.cacheWarm
 				logger.log key:key, bucket:bucket, format:format, style:style, "request is only for cache warm so not sending stream"

services/filestore/app/coffee/FileHandler.coffee

@@ -6,6 +6,7 @@ FileConverter = require("./FileConverter")
 KeyBuilder = require("./KeyBuilder")
 async = require("async")
 ImageOptimiser = require("./ImageOptimiser")
+Errors = require('./Errors')
 
 module.exports = FileHandler =
 
@@ -32,7 +33,7 @@ module.exports = FileHandler =
 
 	_getStandardFile: (bucket, key, opts, callback)->
 		PersistorManager.getFileStream bucket, key, opts, (err, fileStream)->
-			if err?
+			if err? and !(err instanceof Errors.NotFoundError)
 				logger.err  bucket:bucket, key:key, opts:FileHandler._scrubSecrets(opts), "error getting fileStream"
 			callback err, fileStream