Ajaxリクエスト送信は成功しましたがsuccessメソッドには入りません

$.ajax({
 type : "get",
 data : {'dbId':node.dbId,'viewId':node.id,'date':new Date()},
 url : "${ctp}/ViewOperate/ShowViewSql",
 dataType : "json",
 success : function(data){
      console.log(data);
      layer.alert(data,{
          skin: 'layui-layer-molv'
      });
 }
 error : function(data){
      layer.alert("   error  ",{
          skin: 'layui-layer-molv'
      });
 }
});

@RequestMapping(value="/ShowViewSql",method=RequestMethod.GET)
@ResponseBody
public String showCreateViewSql(@RequestParam(value="dbId",required=false)Integer dbId,
      @RequestParam(value="viewId",required=false)Integer viewId) {

 return "abc";
}