Re: [Dspace-tech] Fwd: Tomcat Crashing Intermittently
On Sat, Oct 20, 2012 at 03:21:34PM +0200, Hilton Gibson wrote: Can you cc the list your monit configurations? Here's what I have so far. There is much more I'd like to investigate, but I'm going slowly and feeling my way. savage monit.d # cat check-tomcat-7.rc check process tomcat-7 with pidfile /var/run/tomcat-7.pid start program = /etc/init.d/tomcat-7 restart stop program = /etc/init.d/tomcat-7 stop # below from http://fak3r.com/2010/10/07/howto-monitor-tomcat-with-monit-and-munin-in-debian/ if cpu 60% for 2 cycles then alert # if cpu 80% for 5 cycles then restart # if totalmem 1500.0 MB for 5 cycles then restart # if failed host 127.0.0.1 port 113 then alert # if failed host 127.0.0.1 port 8180 then alert # if 5 restarts within 5 cycles then timeout savage monit.d # cat notify.rc # notify.rc # monit alert recipients set alert mw...@iupui.edu set alert 3175551...@vtext.com set alert someone-e...@iupui.edu savage monit.d # I found that, on Gentoo Linux, you really need to use restart rather than start, because OpenRC will have Tomcat in crashed state and start won't work. I have no idea why the commented-out parts above want to monitor the Ident port (113). Just the default process monitoring has caught several crashes in the last few weeks, and restarted Tomcat automatically each time. -- Mark H. Wood, Lead System Programmer mw...@iupui.edu Asking whether markets are efficient is like asking whether people are smart. pgpAKcT4jWYqx.pgp Description: PGP signature -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
Re: [Dspace-tech] Fwd: Tomcat Crashing Intermittently
Just a note.
When Tomcat crashes, is the pid still there?
Would it not be better to monitor the port?
See below
bibboek@ir1:/etc/monit$ sudo cat monitrc
set daemon 60
set logfile syslog facility log_daemon
set mailserver localhost
set mail-format { from: mo...@ez.sun.ac.za }
set alert root@localhost
set httpd port 2812
allow X:X
check process sshd with pidfile /var/run/sshd.pid
start program /etc/init.d/ssh start
stop program /etc/init.d/ssh stop
if failed port 22 protocol ssh then restart
check host sunscholar with address scholar.sun.ac.za
start program = /etc/init.d/tomcat6 restart
stop program = /etc/init.d/tomcat6 stop
if failed port 80 proto http then restart
alert hgib...@sun.ac.za
alert wk...@sun.ac.za
###
On 22 October 2012 16:10, Mark H. Wood mw...@iupui.edu wrote:
On Sat, Oct 20, 2012 at 03:21:34PM +0200, Hilton Gibson wrote:
Can you cc the list your monit configurations?
Here's what I have so far. There is much more I'd like to
investigate, but I'm going slowly and feeling my way.
savage monit.d # cat check-tomcat-7.rc
check process tomcat-7 with pidfile /var/run/tomcat-7.pid
start program = /etc/init.d/tomcat-7 restart
stop program = /etc/init.d/tomcat-7 stop
# below from
http://fak3r.com/2010/10/07/howto-monitor-tomcat-with-monit-and-munin-in-debian/
if cpu 60% for 2 cycles then alert
# if cpu 80% for 5 cycles then restart
# if totalmem 1500.0 MB for 5 cycles then restart
# if failed host 127.0.0.1 port 113 then alert
# if failed host 127.0.0.1 port 8180 then alert
# if 5 restarts within 5 cycles then timeout
savage monit.d # cat notify.rc
# notify.rc
# monit alert recipients
set alert mw...@iupui.edu
set alert 3175551...@vtext.com
set alert someone-e...@iupui.edu
savage monit.d #
I found that, on Gentoo Linux, you really need to use restart rather
than start, because OpenRC will have Tomcat in crashed state and
start won't work.
I have no idea why the commented-out parts above want to monitor the
Ident port (113).
Just the default process monitoring has caught several crashes in the
last few weeks, and restarted Tomcat automatically each time.
--
Mark H. Wood, Lead System Programmer mw...@iupui.edu
Asking whether markets are efficient is like asking whether people are
smart.
--
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_sfd2d_oct
___
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--
*Hilton Gibson*
Systems Administrator
JS Gericke Library
Room 1025D
Stellenbosch University
Private Bag X5036
Stellenbosch
7599
South Africa
Tel: +27 21 808 4100 | Cell: +27 84 646 4758
http://library.sun.ac.za
http://scholar.sun.ac.za
--
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_sfd2d_oct___
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Re: [Dspace-tech] Fwd: Tomcat Crashing Intermittently
On Mon, Oct 22, 2012 at 04:23:38PM +0200, Hilton Gibson wrote: Just a note. When Tomcat crashes, is the pid still there? Would it not be better to monitor the port? Good point. I already had Nagios watching ports from afar, so I've been concentrating on the simple case where the process actually disappears. We've been having crashes (process dies) lately but no hangs (process remains but is unresponsive) or runaways (process consumes much CPU but does little apparent work). Monit is right there on the same host and can do something about a crashed or hung service, so I'll be adding conditions and responses as I get a feel for the tool. I'm intrigued by the possibility of using the JMX plugin to recognize imminent PermGen exhaustion, take a thread dump and preemptively restart. -- Mark H. Wood, Lead System Programmer mw...@iupui.edu Asking whether markets are efficient is like asking whether people are smart. pgpInEWMUOoXO.pgp Description: PGP signature -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
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