Re: How ot monitor hung tomcat/apache processes?

2010-09-23 Thread Juha Laiho
On 09/22/2010 03:42 PM, Darryl Lewis wrote: Are you trying to monitor from the same computer that tomcat is running on? That's not a good idea. What happens if the entire system crashes...you won't get any data/alerts. End to end uses another machine to monitor the first. You could monitor cata

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Leon Kolchinsky
Hi, You can try several approaches (I'll list 2 that I'm aware of): 1) Automatic restarts on OutOfMemory errors: Add the following to CATALINA_OPTS: -XX:OnOutOfMemoryError=/usr/sbin/restart_tcserver Write your restart_tcserver (you may send an e-mail notification from it etc.) 2) This is what

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Shashank, On 9/22/2010 8:30 AM, Mendiratta, Shashank wrote: > Thanx , about that here the outbound port 80 is blocked so we cannot > wget , moreover this wont solve the problem as to why the the services > are getting hung. Hmm. Can you monitor from

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Pid
On 22/09/2010 17:29, Mendiratta, Shashank wrote: > Hi .. can you share the script ?? Which script? You wrote it, according to the below: > On 22/09/2010 13:54, Mendiratta, Shashank wrote: >> So I have to come up with a cript also which how the system is serving > >> pages if its to slow . then

RE: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Mendiratta, Shashank
Hi .. can you share the script ?? -Original Message- From: Pid [mailto:p...@pidster.com] Sent: Wednesday, September 22, 2010 9:52 PM To: Tomcat Users List Subject: Re: How ot monitor hung tomcat/apache processes? On 22/09/2010 13:54, Mendiratta, Shashank wrote: > So I have to come

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Pid
On 22/09/2010 13:03, Mendiratta, Shashank wrote: > Hi , > > I am working on a monitoring system to find out hung tomcat/apache > processes. Instead of looking for problems so you can restart the JVM, trying looking at the actual problem and fixing it, then you won't have to invent crazy solutio

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Pid
On 22/09/2010 13:54, Mendiratta, Shashank wrote: > So I have to come up with a cript also > which how the system is serving pages if its to slow . then to restart > the JVM . Really? That sounds, well, a little drastic... p 0x62590808.asc Description: application/pgp-keys signature.asc Desc

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Pid
On 22/09/2010 13:08, Darryl Lewis wrote: > In my experience, the PID can still exist of tomcat but a Java heap crash has > stopped it responding. > > Checking a PID will not check if the application is responding. Obviously, I exist whether Tomcat is running or not. p 0x62590808.asc Descri

RE: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Mendiratta, Shashank
[mailto:darryl.le...@unsw.edu.au] Sent: Wednesday, September 22, 2010 6:12 PM To: Mendiratta, Shashank; Tomcat Users List Subject: Re: How ot monitor hung tomcat/apache processes? Are you trying to monitor from the same computer that tomcat is running on? That's not a good idea. What happens if the e

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Darryl Lewis
do ? Regards Shashank -Original Message- From: Darryl Lewis [mailto:darryl.le...@unsw.edu.au] Sent: Wednesday, September 22, 2010 5:38 PM To: Tomcat Users List Subject: Re: How ot monitor hung tomcat/apache processes? In my experience, the PID can still exist of tomcat but a Java heap crash ha

RE: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Mendiratta, Shashank
: Re: How ot monitor hung tomcat/apache processes? It depends on the application you are running, but a simple test would be to access the webpage (ensuring part of it is served from Tomcat, not apache) and check for an expected response. For example, a simple jsp page that prints out "ok

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Darryl Lewis
is [mailto:darryl.le...@unsw.edu.au] Sent: Wednesday, September 22, 2010 5:38 PM To: Tomcat Users List Subject: Re: How ot monitor hung tomcat/apache processes? In my experience, the PID can still exist of tomcat but a Java heap crash has stopped it responding. Checking a PID will not check i

RE: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Mendiratta, Shashank
To: Tomcat Users List Subject: Re: How ot monitor hung tomcat/apache processes? In my experience, the PID can still exist of tomcat but a Java heap crash has stopped it responding. Checking a PID will not check if the application is responding. You're better to do some sort of end t

Re: How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Darryl Lewis
In my experience, the PID can still exist of tomcat but a Java heap crash has stopped it responding. Checking a PID will not check if the application is responding. You're better to do some sort of end to end monitoring On 22/09/10 10:03 PM, "Mendiratta, Shashank" wrote: Hi , I am work

How ot monitor hung tomcat/apache processes?

2010-09-22 Thread Mendiratta, Shashank
Hi , I am working on a monitoring system to find out hung tomcat/apache processes . By this I mean if the PID exists and still the apache / tomcat is not responding that die to memory leak or variety of other reasons . Is their a tool to find this . Regards Shashank