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POJava Jar run as Daemon cant issue exec()
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Id
7094892
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2011-08-17T14:54:13.517
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2012-07-04T05:44:30.673
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2012-07-04T05:44:30.673
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text
Body
I have a java socket server I wrote to allow me to keep a web clusters code base in sync. When I run the init.d script from a shell login like so <pre><code>[root@web11 www]# /etc/init.d/servermngr start </code></pre> Logout and all will work fine but if the server reboots or I run the init.d using services like so <pre><code>[root@web11 www]# service servermngr start </code></pre> Any of the exec() commands passed to the socket server will not get executed on the linux box. I am assuming it has to do with the JVM having no real shell. If I login and run <pre><code>[root@web11 www]# /etc/init.d/servermngr start </code></pre> ...and logout all runs nice all CVS commands are executed. Another note when run as a service the socket server responds to status checks so it is running Here is the init.d script <pre><code>#!/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 </code></pre> And the Java responsible for actually executing the code: <pre><code>// 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); } </code></pre> Thx for any help
Tags
<java><linux><jar><daemon><runtime.exec>
Title
Java Jar run as Daemon cant issue exec()
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1. PO
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1. USAndrew Thompson
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1. USEhask
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