either the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program

在执行jenkins 通过ssh远程操作重启tomcat时，出现了以上错误。明显是环境变量问题，但是服务环境变量是无误的。

有两种解决方案，

1.如果是在 /etc/profile 中导入的环境变量，那么在/root/.bashrc中加入相同环境变量

export JAVA_HOME=/home/jdk1.8.0_181 
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

并执行 source /root/.bashrc

2.直接在重启脚本中加入

#!/bin/sh
export JAVA_HOME=/home/jdk1.8.0_181 
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

TOMCAT_PATH=$1bin

echo "TOMCAT_PATH is $TOMCAT_PATH"

PID=`ps aux | grep $1 | grep java | awk '{print $2}'`

if [ -n "$PID" ]; then
    echo "Will shutdown tomcat: $PID"
    $TOMCAT_PATH/shutdown.sh -force
    sleep 5
else echo "No Tomcat Process $PID"
fi

sleep 1

$TOMCAT_PATH/startup.sh