上次传图片接口调用失败，不能超过最大连接数10

小程序文件上传，提示文件上传失败，报错errMsg:“uploadFile:fail exceed max upload connection count 10”，

微信这个下载接口是多线程的么？

我就一个上传一张图片，为什么超过最大并发数？

chooseImg: function () {         var that = this;         wx.chooseImage({             count: 1,             sizeType: ['compressed'],             sourceType: ['album', 'camera'],             success: function (res) {                 that.upload(res.tempFilePaths[0]);             },         })     },     upload: function (path) {         wx.uploadFile({             url: 'https://xxxx/api/car/upload-car-image',             filePath: path,             name: 'car_image',             header: { 'content-type': 'multipart/form-data' },             formData: {                 'attach_attr': 1             },             success: function (res) {                 // success                 console.log("成功")                 console.log(res.data)             },             fail: function (res) {                 // fail                 console.log("失败", res)             },             complete: function () {                 // complete                 console.log("完成")             }         })     },

根本都没有连接服务器，就直接报错了