add special error handling for a few special serverside errors

lib/api.js

@@ -9,6 +9,16 @@ module.exports.create = function (config) {
 
         var log = config.log;
 
+        var noop = function () {};
+
+        var special_errors = {};
+        ['EPIPE', 'ECONNRESET'].forEach(function (k) { special_errors[k] = noop; });
+        special_errors.NF_ENOENT = function (error, label, info) {
+            log.error(label, {
+                info: info,
+            });
+        };
+
         // spawn ws server and attach netflux event handlers
         NetfluxSrv.create(new WebSocketServer({ server: config.httpServer}))
             .on('channelClose', historyKeeper.channelClose)
@@ -17,11 +27,17 @@ module.exports.create = function (config) {
             .on('sessionClose', historyKeeper.sessionClose)
             .on('error', function (error, label, info) {
                 if (!error) { return; }
-                if (['EPIPE', 'ECONNRESET'].indexOf(error && error.code) !== -1) { return; }
+                if (error && error.code) {
+                    /*  EPIPE,ECONNERESET, NF_ENOENT */
+                    if (typeof(special_errors[error.code]) === 'function') {
+                        return void special_errors[error.code](error, label, info);
+                    }
+                }
+
                 /* labels:
                     SEND_MESSAGE_FAIL, SEND_MESSAGE_FAIL_2, FAIL_TO_DISCONNECT,
                     FAIL_TO_TERMINATE, HANDLE_CHANNEL_LEAVE, NETFLUX_BAD_MESSAGE,
-                    NETFLUX_WEBSOCKET_ERROR, NF_ENOENT
+                    NETFLUX_WEBSOCKET_ERROR
                 */
                 log.error(label, {
                     code: error.code,