crontab无法调用java的问题解决

本来想将写的代码挂在crontab下运行，谁知道无法运行，没有任何输出，试着用ls -al >> 1.log试了一下，确定crontab是正常运行的。

从网站上找了下问题，原因出在crontab启动的程序并不会加载环境变量，因此像“java”这种命令是无法启动的。 

解决方案就是讲java换做具体的java路径。

步骤如下：

1. 运行命令crontab -e加入要运行的命令，并配置其运行频次

 

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1	30 01 * * * /opt/changedig/app/module/rcproject/rcproject.sh

2. 修改启动脚本，将java路径换做绝对路径

 

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#!/bin/sh WORK_DIR="/opt/changedig/app/module/rcproject" MYNAME="rcproject" pidfile=.$MYNAME.pid if test -f $WORK_DIR/$pidfile then # See if a process is running with that process id pid=`cat $WORK_DIR/$pidfile` if test -n "$pid" then ps -ef|grep $MYNAME|grep -v grep|awk '{print $2}'|grep $pid > /dev/null if test $? -eq 0 then # The process is running ! printf "The process is running !\n" exit 3 else # Try the ps listing again as it is not always reliable ps -ef|grep $MYNAME|grep -v grep|awk '{print $2}'|grep $pid > /dev/null if test $? -eq 0 then # The process is running ! printf "The process is running !\n" exit 3 fi fi fi fi echo $$>$WORK_DIR/$pidfile # Check process is existence if [ ! -f $WORK_DIR/rcproject-0.0.1.jar ] ; then printf "Error: Can not find the file $WORK_DIR/rcproject-*.jar\n" return 2 fi /usr/local/java/jdk1.7.0_45/bin/java -jar $WORK_DIR/rcproject-0.0.1.jar

如此即可