Thanks for your input. I forgot to mention that every time after a crash, our hosting company powers down and then powers up the server and then the server is alive again. I have reminded them that if my web application were in fact the culprit, there would be exceptions (memory or too many database connections) ; but the there is none. Best regards Karim Zibari
----- Original Message ---- From: Christopher Schultz <[EMAIL PROTECTED]> To: Tomcat Users List <users@tomcat.apache.org> Sent: Sunday, November 12, 2006 7:19:53 PM Subject: Re: Tomcat reloading -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Karim, Karim Zibari wrote: > Thanks again Chuck. One last question: > > how about if my web app ran out of memory or it made too many > database connections or (as my hosting compnay suggests) that my web > app was to get stuck in loop and render the processor non-responsive > to other requests.? If you can't ping the server, something is definitely wrong. 'ping' is handled by most OSs (IIRC) by the TCP driver, so a process doesn't have to be launched. There ought to be enough scratch memory available to the kernel to respond to it. Generally, when servers stop responding to pings, it's due to a kernel panic (which means your machine totally locks up entirely). I would recommend running sar or some other utility to see what's happening during those times of day. For instance, memory usage, CPU utilization, etc. My guess: you have a transient network problem, and during those times when your server won't respond, it is completely idle. I'll bet that there is a link between you and your server that is going down repeatedly. You could set up a cron job on your server to ping a host once every 30 minutes or so and report the status to you via email. If, after one of these periods of inaccessibility, you suddenly get a dozen email messages all at once saying "can't reach host", you can conclude that your server is being isolated from the network for some reason. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFV3PZ9CaO5/Lv0PARAp6fAJ9S99AQezGJ+5ZsQ0gvEkxOUpMUzACdG0ZD qs448hdKLby52obt2zqsh4w= =UPS0 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] ____________________________________________________________________________________ Cheap talk? Check out Yahoo! Messenger's low PC-to-Phone call rates. http://voice.yahoo.com
