Spring Boot ERROR-The temporary upload location is not valid
muyuanqiang7 10/27/2021 spring bootlinuxdevOps
# Spring Boot ERROR-The temporary upload location is not valid
# 问题描述
线上系统报了个错误
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;nested exception is org.springframework.web.multipart.MultipartException:
Failed to parse multipart servlet request; nested exception is java.io.IOException: The temporary upload location [/tmp/tomcat.8327527609713611085.10001/work/Tomcat/localhost/ROOT] is not valid] with root cause
java.io.IOException: The temporary upload location [/tmp/tomcat.8327527609713611085.10001/work/Tomcat/localhost/ROOT] is not valid
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# 处理办法
通过排查分析发现线上系统主机是centos7.5，而且centos有定时清理/tmp目前的行为特此记录下centos清除/tmp的规则
CentOS6以下系统（含）使用watchtmp + cron来实现定时清理临时文件的效果，这点在CentOS7发生了变化，在CentOS7下，系统使用systemd管理易变与临时文件，与之相关的系统服务有3个：
systemd-tmpfiles-setup.service ：Create Volatile Files and Directories
systemd-tmpfiles-setup-dev.service：Create static device nodes in /dev
systemd-tmpfiles-clean.service ：Cleanup of Temporary Directories
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相关配置文件也有3个地方
/etc/tmpfiles.d/*.conf
/run/tmpfiles.d/*.conf
/usr/lib/tmpfiles.d/*.conf
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/tmp目录的清理规则主要取决于/usr/lib/tmpfiles.d/tmp.conf文件的设定，默认的配置内容为：
# 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 # 清理/tmp下10天前的目录和文件
v /var/tmp 1777 root root 30d # 清理/var/tmp下30天前的目录和文件
# 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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我们可以配置这个文件，由于我们使用的是Spring Boot,则可以配置让系统不自动清理/tmp下以tomcat开头的目录，那么增加下面这条内容到配置文件中即可：
x /tmp/tomcat.*
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更多详细配置请参考 tmpfiles.d 中文手册 (opens new window)