异步处理MultipartFile No such file or directory的分析
2024-09-05 06:27:36
背景
项目中开发导入功能,因为数据量比较大,所以要求后端异步操作。发现改为异步之后,相同代码的情况下会报(No such file or directory)异常
2020-02-28 16:22:51.322 [pool-2-thread-1] ERROR c.c.l.m.business.service.impl.CommonServiceImpl - /private/var/folders/gj/_gbl0m854pn1lw6dn2k4w1gr0000gn/T/tomcat.5469750062936240832.8081/work/Tomcat/localhost/lm-admin/upload_bc9f994f_f4dc_4a2e_9933_dbcec37b3a7e_00000001.tmp (No such file or directory)
com.alibaba.fastjson.JSONException: write javaBean error, fastjson version 1.2.45, class org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:465)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:120)
at com.alibaba.fastjson.serializer.JSONSerializer.write(JSONSerializer.java:280)
at com.alibaba.fastjson.JSON.toJSONString(JSON.java:673)
at com.alibaba.fastjson.JSON.toJSONString(JSON.java:611)
at com.alibaba.fastjson.JSON.toJSONString(JSON.java:576)
at com.citi.lm.modules.business.service.impl.CommonServiceImpl.readAndHandleFile(CommonServiceImpl.java:93)
at com.citi.lm.modules.business.service.impl.CommonServiceImpl$$FastClassBySpringCGLIB$$82c8f695.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684)
at com.citi.lm.modules.business.service.impl.CommonServiceImpl$$EnhancerBySpringCGLIB$$5f90c28f.readAndHandleFile(<generated>)
at com.citi.lm.modules.business.controller.CommonController$1.call(CommonController.java:84)
at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
at java.util.concurrent.FutureTask.run(FutureTask.java)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.alibaba.fastjson.util.FieldInfo.get(FieldInfo.java:484)
at com.alibaba.fastjson.serializer.FieldSerializer.getPropertyValueDirect(FieldSerializer.java:135)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:249)
... 16 more
Caused by: java.io.FileNotFoundException: /private/var/folders/gj/_gbl0m854pn1lw6dn2k4w1gr0000gn/T/tomcat.5469750062936240832.8081/work/Tomcat/localhost/lm-admin/upload_bc9f994f_f4dc_4a2e_9933_dbcec37b3a7e_00000001.tmp (No such file or directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.getInputStream(DiskFileItem.java:194)
at org.apache.catalina.core.ApplicationPart.getInputStream(ApplicationPart.java:100)
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile.getBytes(StandardMultipartHttpServletRequest.java:245)
... 23 more
纠错
不啰嗦过程,最后将焦点集中在接口接收的MultipartFile类型参数上。debug跟踪MultipartFile类型参数发现,在主线程结束响应之后,MultipartFile类型参数就消失了。
分析
说明在响应结束之后,file的内存区域被清除回收了,和servlet规范一致。个人理解,file参数对象就像servlet的request和response对象一样,请求一结束就被清理了。
解决
目前没有解决办法,因为后来项目需求把接收的文件保存下来,那么对我来说就不是问题了。但是我想可以在创建处理线程之前把file中的二进制流转成其他形式保留下来,然后对新保留的数据进行处理。
参考:https://blog.csdn.net/yinni11/article/details/83793930
最新文章
- I7-5775C之所以被Intel跳过,是因为本身有太多BUG
- jquery-qrcode生成二维码
- oracle SGA详解
- Chapter7:类
- 【Java】Treeset实现自定义排序
- mac 下 sphinx + mysql + php 实现全文搜索(xampp)(1)
- linux学习笔记---未完待续,缓慢更新
- Android菜单详解(一)——理解android中的Menu
- JavaScript模板引擎
- php-GD库的函数(二)
- android 数据共享
- 访问不了虚拟机 ubuntu中的myql,解决方案
- EF| CodeFirst 代码先行
- GDB 调试解析
- Linux+Redis实战教程_day02_3、redis数据类型_4、String命令_5、hash命令_6、java操作redis数据库技术
- jeecg框架解决跨域问题
- 洛谷P3811乘法逆元
- @JsonIgnore
- 汇编Shellcode的技巧
- SpringSecurity 3.2入门(5)自定义登录页面
热门文章
- k8s注册节点提示Docker SystemdCheck]: detected cgroupfs"; as the Docker cgroup dr iver. The r ecommended dr fiver is"; systemd";
- 85道Java微服务面试题整理(助力2020面试)
- 物流跟踪API-快递单推送
- python3 控制结构知识及范例
- python 内置模块之os、sys、shutil
- SpringBoot项目版本升级:从1.5.3升级到2.1.8版本
- 题解【Luogu P6102 谔运算】
- .Net Core中IOC容器的使用
- JFrame的getContentPane
- IIS停止服务 报错Connections_Refused