I've already done this. My bash script does two things. It checks a specified URL for a certain string to see if CF is still responsive and it also calls a cf script which reports back an integer that is the amount of free JVM memory left.
If a hang situation is detected the script will pause for a specified amount of time and try again. If the second attempt fails then it issues a restart command. I've also scripted a way to perform automatic stack dumps (it can even find the proper PID on it's own) when when a hang situation is detected. This way you can go into your logs and try to figure out what went wrong. If your JVM memory usage creeps up and is causing unresponsive behavior this script will also record the memory usage when memory reaches a threshold that you set. It can also restart CF if the low memory reaches a second threshold that you set. The script also logs everything into it's own log file in /var/logs/ so you can track actions taken by the script. The reason I wrote this was that when we migrated from CF5 to CFMX 7 the code base was so bad this was the only way to keep the server running. It took me months to track down all the bugs and bad queries to get the code stable. This is what can happen when there is no version control, ten years of development, hacking and re-hacking by so many different programmers that the owner can't name them all. Now we have SVN, good programmers and a bug hound (me). Email me and I can send you a generic copy. -- Wil Genovese (The Juggler) One man with courage makes a majority. -Andrew Jackson A fine is a tax for doing wrong. A tax is a fine for doing well. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Upgrade to Adobe ColdFusion MX7 The most significant release in over 10 years. Upgrade & see new features. http://www.adobe.com/products/coldfusion?sdid=RVJR Archive: http://www.houseoffusion.com/groups/CF-Linux/message.cfm/messageid:4313 Subscription: http://www.houseoffusion.com/groups/CF-Linux/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.14
