linux後臺執行jar包，經常以外退出，定時計劃執行sh檢查jar包執行並重啟

新建restart.sh

[email protected]:~/sub#touch restart.sh

許可權設定744（需要注意定時任務的使用者有沒有執行許可權）

[email protected]:~/sub#chmod 744 restart.sh

#!/bin/sh
export LANG="en_US.UTF-8"
export JAVA_HOME=/usr/java/jdk1.8.0_151
export PATH=$JAVA_HOME/bin:$PATH  
export CLASSPATH=.:$JAVA_HOME/dt.jar:$JAVA_HOME/tools.jar 
#java環境變數

jarDir="/root/sub"
jar="SSR_subscribe-1.0.0.jar"
logFile="/root/sub/restart.log"

restart(){
        cd ${2}
        if [ ! -f ${1} ];then
                echo "jar not exist" >> ${logFile}
                return
        fi
        (java -jar ${1} &)
#埠對映       iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
}

check(){
        count=$(ps -ef | grep ${1} | grep -v "grep")
        if [ -n "${count}" ];then
#               echo "`date` ${1} is running" >> ${logFile}
               echo "`date` ${1} s running"
        else
                restart ${1} ${2}
                echo "`date` ${1} is down. restartig" >> ${logFile}
#               echo "`date` ${1} is down"

        fi
}

check ${jar} ${jarDir}
 

定時任務，每小時檢查jar包執行，如果退出重啟

[email protected]:~#crontab -e

* */1 * * * /bin/sh /root/sub/restart.sh