[CONJS-42] check other connections in pool when an unexpected connect…

…ion error occur

lib/pool.js

@@ -392,6 +392,10 @@ function Pool(options, useCallback) {
         if (currConn === conn) {
           idleConnections.removeOne(idx);
           break;
+        } else {
+          //since connection did have an error, other waiting connection might too
+          //forcing validation when borrowed next time, even if "minDelayValidation" is not reached.
+          currConn.lastUse = new Date(0);
         }
         idx++;
       }