Linux jps 进程消失，但是服务正常运行问题

报错背景

服务器上安装了大数据的很多服务，正常启动运行，但是突然有一天发现，输入：jps命令后，一个进程号都没有了，但是访问服务还可以正常访问，说明服务还在运行，只是进程号没了。

报错现象

略

报错原因

/tmp 目录下的文件被系统自动删除，导致服务异常。

报错解决

修改配置文件

[root@bigdata1 ~]# 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
x /tmp/hsperfdata_*
x /tmp/jetty-*
~