SpringBoot文件上传异常之提示The temporary upload location xxx is not valid
2023-05-16
原文: 一灰灰Blog之Spring系列教程文件上传异常原理分析
SpringBoot搭建的应用,一直工作得好好的,突然发现上传文件失败,提示org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException: The temporary upload location [/tmp/tomcat.6239989728636105816.19530/work/Tomcat/localhost/ROOT] is not valid目录非法,实际查看目录,结果还真没有,下面就这个问题的表现,分析下SpringBoot针对文件上传的处理过程
I. 问题分析
0. 堆栈分析
问题定位,最佳的辅助手段就是堆栈分析,首先捞出核心的堆栈信息
org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException: The temporary upload location [/tmp/tomcat.6239989728636105816.19530/work/Tomcat/localhost/ROOT] is not valid
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.handleParseFailure(StandardMultipartHttpServletRequest.java:122)
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:113)
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:86)
at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:93)
at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1128)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:960)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
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springboot启动时会创建一个/tmp/tomcat.*/work/Tomcat/localhost/ROOT的临时目录作为文件上传的临时目录,但是该目录会在n天之后被系统自动清理掉,这个清理是由linux操作系统完成的,具体的配置如下 vim /usr/lib/tmpfiles.d/tmp.conf
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
# See tmpfiles.d(5) for details
# Clear tmp directories separately, to make them easier to override
v /tmp 1777 root root 10d
v /var/tmp 1777 root root 30d
# Exclude namespace mountpoints created with PrivateTmp=yes
x /tmp/systemd-private-%b-*
X /tmp/systemd-private-%b-*/tmp
x /var/tmp/systemd-private-%b-*
X /var/tmp/systemd-private-%b-*/tmp
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