Except for user sessions getting lost, you wouldn't even know the server crashed.
Which brings me to another question. Is there a way to force the server to cache user variables to disk (like it does when you do a clean restart of the service) so that if I did that every minute or so, i'd end up only loosing the users that haven't been on for that long? Of course I'd only do it if it wasn't too cpu intensive.
/John
Jeff Bohmer wrote:
There are a few more options. In addition to procautostart, there is also daemontools <http://cr.yp.to/daemontools.html>.
I've been using the shell script below on OS X for a while. I also use STARTUPURL to call a TAF that emails me when the app server starts.
- Jeff
#!/bin/sh # # watcher.sh # # Start the Witango app server if it isn't running. # If the variable dump file exists, deleted it before # starting the app server. # . /etc/rc.common
/usr/bin/top -w -l 1 | /usr/bin/grep witango >> /Applications/Witango/Server/watcher.log
x=`/bin/ps axc | /usr/bin/grep witango` if /bin/test -z "$x" then ConsoleMessage "watcher.sh: Starting Witango App Server" echo "`date` watcher.sh: Starting Witango App Server" >> /Applications/Witango/Server/watcher.log if /bin/test -e /Applications/Witango/Server/configuration/variables.WitangoServer/WitangoServer.dump then rm /Applications/Witango/Server/configuration/variables.WitangoServer/WitangoServer.dump fi /Library/StartupItems/Witango5/Witango5 start fi
The solution that I implemented on Linux should work on OSX... No need to use cron though.
the solution i used is called "procautostart"
I downloaded the source and compiled it. Since OSX is a flavor of Unix now, you should be able to do the same.
Check out this link, it explaines how the procautostart process works.
http://www.linuxdocs.org/HOWTOs/Process-Monitor-HOWTO-2.html
Once you get procautostart compiled and running on the simple test that they provide, you can do something like this to your start witango script.
#!/bin/bash
# Set up environment umask 022 WITANGO_USER=witango ; export WITANGO_USER WITANGO_PATH=/usr/local/witango ; export WITANGO_PATH WITANGO_CONFIG=$WITANGO_PATH/configuration ; export WITANGO_CONFIG JAVA_HOME=/usr/local/j2re1.4.1_03 ; export JAVA_HOME
PATH=$WITANGO_PATH/bin:/bin:/usr/bin ; export PATH LD_LIBRARY_PATH=$WITANGO_PATH:$JAVA_HOME/lib/i386/server:$JAVA_HOME/lib/i386/client:$JAVA_HOME/lib/i386:/usr/lib ; export LD_LIBRARY_PATH CLASSPATH=$WITANGO_PATH/jdbc_drivers/JSQLConnect.jar:$WITANGO_PATH ; export CLASSPATH LC_ALL=en_US ; export LC_ALL
cd /usr/local/witango
/sbin/procautostart -n 5 -c "$WITANGO_PATH/witangod -u" nohup &
/John
Michael Dittbrenner wrote:
I was wondering if anyone has and is willing to share code to have the witangod process restarted after it unexpectedly quits. We just upgraded to witango 5 for mac and the server seems to quit out, I was in the process of trying to write a shell script to be called by crontab to see if the process is running if not to start it. If someone has anything like this and is willing to share I would greatly appreciate it.
Mike D
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