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From Martin Gainty <mgai...@hotmail.com>
Subject RE: Tomcat is not serving requests - but not crashed...
Date Sat, 11 Apr 2009 15:14:01 GMT

Please configure Tomcat for logging and restart TC

http://tomcat.apache.org/tomcat-5.5-doc/logging.html

Once the exceptions are noted in %TOMCAT_HOME%/logs
please display the contents of the log so we can be of further assistance

Thanks,
Martin 
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> Date: Sat, 11 Apr 2009 07:27:04 -0700
> From: egidijus@click2sell.eu
> To: users@tomcat.apache.org
> Subject: Re: Tomcat is not serving requests - but not crashed...
> 
> 
> Here are some configuration details:
> 
> Server: Linux CentOS Linux version 2.6.18-8.1.14.el5PAE
> (mockbuild@builder7.centos.org) (gcc version 4.1.1 20070105 (Red Hat
> 4.1.1-52))
> Server version: Apache Tomcat/5.5.23
> Server built:   Mar 5 2007 08:25:04
> Server number:  5.5.23.0
> OS Name:        Linux
> OS Version:     2.6.18-8.1.14.el5PAE
> JVM Version:    1.5.0_12-b04
> JVM Vendor:     Sun Microsystems Inc.
> 
> Apache serves as main web server in front of tomcat, apache is communicating
> with tomcat via AJP protocol.
> 
> Tomcat process running with the following command:
> /usr/java/jdk/bin/java -Xms1024m -Xmx2048m -Djava.awt.headless=true
> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
> -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties
> -Djava.endorsed.dirs=/usr/local/tomcat/common/endorsed -classpath
> :/usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/commons-logging-api.jar
> -Dcatalina.base=/usr/local/tomcat -Dcatalina.home=/usr/local/tomcat
> -Djava.io.tmpdir=/usr/local/tomcat/temp
> org.apache.catalina.startup.Bootstrap start
> 
> 
> Bugzilla from gsexton@Mhsoftware.com wrote:
> > 
> > Your description is pretty short of information. It's unlikely you will 
> > get any useful comments. If you would like help, you'll have to provide 
> > more information.
> > 
> > Which version of 5.5?
> > 
> > What JVM?
> > 
> > What Operating System? If Linux, what Kernel? If Windows, what version 
> > and Service Packs?
> > 
> > What command line arguments are you using for the JVM?
> > 
> > kegliuz wrote:
> >> Hello guys,
> >> 
> >> We are running a Tomcat 5.5 version through proxy_ajp mode via a regular
> >> Apache webserver.
> >> 
> >> Within last 2 weeks we had 2 strange downtimes of our system. Our
> >> application is running on Tomcat 5.5.
> >> 
> >> ************
> >> 1 CASE
> >> 
> >> One morning I woke up and noticed our website is down. I logged into the
> >> server and checked for running processes.
> >> The servers load was around 4% (while normally it's around 1%). I checked
> >> Tomcat and it was still running, however, the webserver did not respond
> >> to
> >> any queries. The browser was unable to load our website.
> >> 
> >> So I tried to restart Tomcat: 
> >> 1) to stop the service 
> >> and then 
> >> 2) start it.
> >> 
> >> When I ran a command: service tomcat stop - the Tomcat tried to shut
> >> down.
> >> However it stopped responding... No status on command line, nothing. It
> >> looked like the server halted. So I had to re-login to the server once
> >> again
> >> and then again to run the same command to stop tomcat.
> >> 
> >> Tomcat started to respond only the 2nd time and it stopped.
> >> 
> >> Then I ran a command to start tomcat: service tomcat start
> >> Tomcat did not start for the first time. Well, it started, however, it
> >> did
> >> not respond.
> >> So I had to stop it once again and then ran a start command once again to
> >> get it up and running.
> >> This time Tomcat started successfully and the application started to
> >> work.
> >> 
> >> 
> >> However, the question is: who caused the problem with Tomcat not
> >> responding?
> >> It did not crash, however, the web server was no functioning and unable
> >> to
> >> process requests.
> >> 
> >> I checked our ping software's logs to see for a downtime and noticed that
> >> downtime started to appear something like this:
> >> 
> >> 5 minute intervals
> >> down...
> >> down...
> >> OK!
> >> OK!
> >> down...
> >> OK!
> >> down...
> >> down...
> >> down...
> >> down...
> >> down...
> >> until i finally restarted the server.
> >> 
> >> Tomcat did not fully crashed, however, it was not serving the requests.
> >> *************
> >> 2 CASE
> >> *************
> >> 
> >> This week I woke up again in the morning and I noticed that Tomcat is
> >> serving everything really slow... It was taking 2 minutes or so to load
> >> the
> >> website, however, this time it was serving (at least!).
> >> 
> >> I went to restart Tomcat and application this time again and got the same
> >> issues as described in CASE 1. Not responding, etc.
> >> I had to stop tomcat, relogin, stop it again, then start it, stop it and
> >> finally start it again and it started working.
> >> 
> >> 
> >> So my question: what should we do in order to find a reason what's
> >> causing
> >> these Tomcat's downtimes? How to prevent them?
> >> We tried checking all tomcats logs, etc. but did not find any real
> >> problems.
> >> 
> >> Please, help us to identify the problems so we could fix it... Any
> >> suggestions?
> >> 
> >> Thank you in advance!
> >> 
> >> Sincerely,
> >> Keglius
> > 
> > -- 
> > George Sexton
> > MH Software, Inc.
> > Voice: +1 303 438 9585
> > URL:   http://www.mhsoftware.com/
> > 
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> > 
> > 
> > 
> 
> -- 
> View this message in context: http://www.nabble.com/Tomcat-is-not-serving-requests---but-not-crashed...-tp22990181p23001710.html
> Sent from the Tomcat - User mailing list archive at Nabble.com.
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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