作为守护进程运行的Java Jar不能发出exec()

Question

我有一个java套接字服务器，我写的，让我保持一个web集群代码库同步。当我运行init。D脚本从shell登录，像这样

[root@web11 www]# /etc/init.d/servermngr start

注销和所有将工作得很好，但如果服务器重新启动或我运行init。D使用像这样的服务

[root@web11 www]# service servermngr start

传递给套接字服务器的任何exec()命令都不会在linux机器上执行。我假设这与JVM没有真正的shell有关。如果我登录并运行

[root@web11 www]# /etc/init.d/servermngr start

…和注销都运行良好，所有CVS命令都被执行。

另一个注意事项当作为服务运行时，套接字服务器响应状态检查，因此它正在运行

下面是init。d脚本

#!/bin/sh
# chkconfig: 2345 95 1
# description: Starts Daemon Using ServerManager.jar.
# 
# Source function library.
. /etc/init.d/functions

start () {
    echo -n $"Starting ServerManager: "
    # start daemon
    cd /www/servermanager/
    daemon java -jar ServerManager.jar > /www/logs/ServerManager.log &
    RETVAL=$?
    echo
    [ $RETVAL = 0 ] && touch /var/lock/subsys/cups
    echo "";
    return $RETVAL
}
stop () {
    # stop daemon
    echo -n $"Stopping $prog: "
    kill `ps uax | grep -i "java -jar ServerManager.ja[r]" | head -n 1 | awk '{print $2}'`
    RETVAL=$?
    echo "";
    return $RETVAL
}
restart() {
    stop
    start
}
case $1 in
    start)
        start
    ;;
    stop)
        stop
    ;;
    *)
    echo $"Usage: servermngr {start|stop}"
    exit 3
esac
exit $RETVAL

和负责实际执行代码的Java:

// Build cmd Array of Strings
            String[] cmd = {"/bin/sh", "-c", "cd /www;cvs up -d htdocs/;cvs up -d phpinclude/"};
            final Process process;
            try {
                process = Runtime.getRuntime().exec(cmd);
                BufferedReader buf = new BufferedReader(new InputStreamReader(
                        process.getInputStream()));
                // Since this is a CVS UP we return the Response to PHP
                if(input.matches(".*(cvs up).*")){
                    String line1;
                    out.println("cvsupdate-start");
                    System.out.println("CVS Update" + input);
                    while ((line1 = buf.readLine()) != null) {
                        out.println(line1);
                        System.out.println("CVS:" + line1);
                    }
                    out.println("cvsupdate-end");
                }
            } catch (IOException ex) {
                System.out.println("IOException on Run cmd " + CommandFactory.class.getName() + " " + ex);
                Logger.getLogger(CommandFactory.class.getName()).log(Level.SEVERE, null, ex);
            }

谢谢你的帮助

Answer 1

您要运行的命令是什么?cd不是一个程序，如果你有;，你有多个命令。您只能运行一个程序!

Answer 2

是否以root身份启动该进程?系统上运行的是什么版本的bash?为了排除外壳本身的问题，你可能想尝试一下现金。我还建议用'&'而不是';'来链接命令。最后，您可能会发现创建包含所有命令并由java进程调用的shell脚本更容易。您可能还想调查nohup并检查/etc/security/limits

Answer 3

您可能更乐意使用http://akuma.kohsuke.org/来帮助您处理这些东西，或者至少使用Apache Commons Exec。

Answer 4

如果有人遇到问题，这是修复我的问题的启动脚本

#!/bin/sh
# chkconfig: 2345 95 1
# description: Starts Daemon Using ServerManager.jar.
# 
# Source function library.
. /etc/init.d/functions
RETVAL=0
prog="ServerManager"
servermanager="java"
serveroptions=" -jar ServerManager.jar"
pid_file="/var/run/servermanager.pid"
launch_daemon()
{
  /bin/sh << EOF
     java -Ddaemon.pidfile=$pid_file $serveroptions <&- &
     pid=$!
     echo ${pid}
EOF
}
start () {
    echo -n $"Starting $prog: "
 if [ -e /var/lock/subsys/servermanager ]; then
                if [ -e /var/run/servermanager.pid ] && [ -e /proc/`cat /var/run/servermanager.pid` ]; then
                echo -n $"cannot start: servermanager is already running.";
                failure $"cannot start: servermanager already running.";
                echo
                return 1
                fi
        fi
    # start daemon
    cd /www/voodoo_servermanager/
    export CVSROOT=":pserver:[e-mail]:/cvsroot";
    daemon "$servermanager $serveroptions > /www/logs/ServerManager.log &"
    #daemon_pid=`launch_daemon`
    #daemon ${daemon_pid}
    RETVAL=$?
    echo
    [ $RETVAL = 0 ] && touch /var/lock/subsys/servermanager && pidof $servermanager > $pid_file
    echo "";
    return $RETVAL
}
stop () {
    # stop daemon
    echo -n $"Stopping $prog: "
        if [ ! -e /var/lock/subsys/servermanager ]; then
            echo -n $"cannot stop ServerManager:  ServerManager is not running."
            failure $"cannot stop ServerManager:  ServerManager is not running."
        echo
        return 1;
        fi
        killproc $servermanager
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/servermanager;
        return $RETVAL
}
restart() {
    stop
    start
}
case $1 in
    start)
        start
    ;;
    stop)
        stop
    ;;
    restart)
        restart
    *)
    echo $"Usage: servermngr {start|stop|restart}"
    RETVAL=1
esac
exit $RETVAL