Eric,
You can use a simple Consumer/Producer pattern here.
See the java.util.Queue classes. What I have done in a similar situation
is create a single Queue, multiple consumer threads all blocking on the
same queue. A user action puts something in the queue, and one of the
thread comes out
Eric P wrote:
Hi all,
In my Tomcat app I'm looking for a good (or commonly used) method for
firing off an asynchronous task. For example, a user registers for an
account, and an a task to send a verification email to the user is
triggered w/o delaying the response to the user (i.e., task
On 22/07/2010 05:58, Eric P wrote:
Hi all,
In my Tomcat app I'm looking for a good (or commonly used) method for
firing off an asynchronous task. For example, a user registers for an
account, and an a task to send a verification email to the user is
triggered w/o delaying the response to
On 22/07/2010 04:30, sharkanana wrote:
I've run tomcat so many times before on every one of my computers with no
problem, but I just went to do it today on my desktop and am getting an
error immediately on the start of the server.
I have set catalina_home, classpath,
In addition to
On 07/22/2010 10:17 AM, Pid wrote:
Have a look at Executors.class in java.util.concurrent. You can
start/stop an ExecutorService in the init/destroy methods of your
Servlet, submit a Runnable to the ExecutorService representing the
job(s) you want to execute.
Timer / TimerTask might be
André Warnier wrote:
Eric P wrote:
Hi all,
In my Tomcat app I'm looking for a good (or commonly used) method for
firing off an asynchronous task. For example, a user registers for an
account, and an a task to send a verification email to the user is
triggered w/o delaying the response to
On 07/22/2010 10:33 AM, André Warnier wrote:
Talking further to myself, I'll add that it also makes it easier to
suspend/resume the sending of emails separately if you need to for
some reason, without having to change anything to your running webapp.
I know, it is certainly less exciting than
laredotornado wrote:
Hi,
I'm using Tomcat 6.0.26, Java 1.6 and wondering what tools/strategies you
use to tune your garbage collection parameters?
My main strategy is to see if I have any cripping GC problems.
If not, I leave the GC to its own (or Sun's) devices.
GC tuning is likely to be
Google is your friend:
java garbage collection log format
quickly leads to
http://stackoverflow.com/questions/895444/java-garbage-collection-log-messages
and others
Then figure out if you actually have a problem which requires any
adjustment.
On Jul 21, 2010, at 5:07 PM,
Op donderdag, 22 juli 2010 14:14 schreef paul womack pwom...@papermule.co.uk:
laredotornado wrote:
Hi,
I'm using Tomcat 6.0.26, Java 1.6 and wondering what tools/strategies you
use to tune your garbage collection parameters?
My main strategy is to see if I have any cripping GC problems.
Miki/Andre
//i wasnt able to determine JMX ability to schedule a specific task for a
specific time?
//could you reply with an example demonstrating that capability?
//in the meanwhile you *could* implement Axis2 SchedulerTimerTask
//granted java.util.Timer is weak on specific time but if
On 07/22/2010 03:49 PM, Martin Gainty wrote:
//i wasnt able to determine JMX ability to schedule a specific task for a
specific time?
I was referring to Andre's sentence:
[using database] makes it easier to suspend/resume the sending of
emails separately if you need to for some reason,
Hi Tomcatters,
Just a quick question regarding Apache Web Server load balancing down to
Tomcat cluster.
We have a number of 2-node Tomcat 6.0.20 clusters, all configured as
peer to peer pairs, on the same subnet with no real network oddities
mesh getting in the way to speak of.
Apache
Mikolaj Rydzewski wrote:
On 07/22/2010 03:49 PM, Martin Gainty wrote:
//i wasnt able to determine JMX ability to schedule a specific task
for a specific time?
I was referring to Andre's sentence:
[using database] makes it easier to suspend/resume the sending of
emails separately if you
On 22.07.2010 16:19, Darren Kukulka wrote:
Hi Tomcatters,
Just a quick question regarding Apache Web Server load balancing down to
Tomcat cluster.
We have a number of 2-node Tomcat 6.0.20 clusters, all configured as
peer to peer pairs, on the same subnet with no real network oddities
mesh
Hi folks!
I've a strange problem, please help me to find a solution (not telling me to
make a script in order restart tomcat in case of the exception)
Under linux environment,
RedHat EL5.5
Jdk 1.5.0_22
Tomcat6.0.26
our webapps takes strange intermittent javax.net.ssl.SSLException: Invalid
padding
On Jul 22, 2010, at 9:19 AM, Darren Kukulka wrote:
Another, more difficult scenario, is when one of the Tomcat cluster
nodes begins to groan and become unresponsive, say when OldGen or
PermGen becomes full...in this case the mod_jk connector does not
identify the node as having failed and
Using apache-tomcat-6.0.28...
We are encountering issue with catalina.sh stops IF we use a variable to set
the SHUTDOWN port.
e.g.:
CATALINA_OPTS = ...-Dco.shutdown.port=8104 ...
server.xml =...
!-
Server port=8104 shutdown=SHUTDOWN
--
If you look at catalina.sh you will see that stop does not include
CATALINA_OPTS:
$_RUNJAVA $JAVA_OPTS \
-Djava.endorsed.dirs=$JAVA_ENDORSED_DIRS -classpath $CLASSPATH \
-Dcatalina.base=$CATALINA_BASE \
-Dcatalina.home=$CATALINA_HOME \
-Djava.io.tmpdir=$CATALINA_TMPDIR \
On 22.07.2010 17:02, John A Parker wrote:
Using apache-tomcat-6.0.28...
We are encountering issue with catalina.sh stops IF we use a variable to set
the SHUTDOWN port.
e.g.:
CATALINA_OPTS = ...-Dco.shutdown.port=8104 ...
server.xml =...
!-
Server
On 22.07.2010 17:24, David Fisher wrote:
If you look at catalina.sh you will see that stop does not include
CATALINA_OPTS:
$_RUNJAVA $JAVA_OPTS \
-Djava.endorsed.dirs=$JAVA_ENDORSED_DIRS -classpath $CLASSPATH \
-Dcatalina.base=$CATALINA_BASE \
-Dcatalina.home=$CATALINA_HOME \
Rainer, et al,
Obvious (now that you point it out! (:-\).
Moving my settings to JAVA_OPTS corrected the behavior.
THANKS TO ALL!
John
Cornell University
(607) 255-9356
john.a.par...@cornell.edu
-Original Message-
From: Rainer Jung [mailto:rainer.j...@kippdata.de]
Sent: Thursday, July
1. Is there a JMX counter/attribute that measures active/busy HTTP threads?
2. How can I send a notification on exceeding a threshold value on this
counter?
3. Can this be achieved through some admin console? Modifying tomcat code is
not an option.
Thanks,
Kapil
--
View this message in context:
java -version
java version 1.6.0_18
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode)
javac -version
javac 1.6.0_18
Tomcat 7 is the version I'm currently trying to run with, I installed it by
extracting the zip file.
I'm starting with
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Eric,
On 7/22/2010 12:58 AM, Eric P wrote:
One idea would be to insert a record into a database table that
signifies an email should be sent to the user. This table could be
regularly checked by a scheduled job (e.g., a TimerTask) that runs every
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André,
On 7/22/2010 4:33 AM, André Warnier wrote:
André Warnier wrote:
Talking further to myself, I'll add that it also makes it easier to
suspend/resume the sending of emails separately if you need to for some
reason, without having to change
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Eric,
On 7/22/2010 12:56 PM, Christopher Schultz wrote:
Eric,
On 7/22/2010 12:58 AM, Eric P wrote:
One idea would be to insert a record into a database table that
signifies an email should be sent to the user. This table could be
regularly
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Kapil,
On 7/22/2010 12:07 PM, kapilok wrote:
1. Is there a JMX counter/attribute that measures active/busy HTTP threads?
Yes, depending on the Tomcat version. You didn't mention yours.
2. How can I send a notification on exceeding a threshold
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Chuck,
On 7/22/2010 12:21 AM, Caldarale, Charles R wrote:
From: sharkanana [mailto:sharkan...@gmail.com]
Subject: Problems starting Tomcat on windows 7 64bit.
I have tried many different versions of tomcat and
all give the same problem.
So
Hi,
I'm using RHEL5.5 (Up-to-date)
Apache httpd-2.2.3 (from RHEL) with mod_proxy/mod_proxy_ajp
Tomcat 6.0.28 (binary distribution from apache).
Tomcat native libs (1.1.20, compiled)
I have a question regarding AJP connectors and SSL
Our application is being SSL offloaded at the HTTPD server end
On 22.07.2010 19:31, Brett Delle Grazie wrote:
Hi,
I'm using RHEL5.5 (Up-to-date)
Apache httpd-2.2.3 (from RHEL) with mod_proxy/mod_proxy_ajp
Tomcat 6.0.28 (binary distribution from apache).
Tomcat native libs (1.1.20, compiled)
I have a question regarding AJP connectors and SSL
Our
Hi,
I am developing an Struts2 application, but unfortunately it doesn´t run, It
gives me the following error:
ERROR: Servlet /webstruts throw exception de load()
javax.servlet.UnavailableException: Initializing application data source
org.apache.struts.action.DATA_SOURCE
Anybody knows how
Hi,
For tomcat, if we dont give any memory args in catalina.sh, then want is the
xms and xmx values. And can we monitor tomcat memory utilization from tomcat
manager(console). If we are not using tomcat console then is there any way
to monitor memory utilization of tomcat instance.
--
Thanks,
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Gopi,
On 7/22/2010 5:11 PM, Gopi Valleru wrote:
For tomcat, if we dont give any memory args in catalina.sh, then want
is the xms and xmx values.
This is entirely up to the JVM, and is not Tomcat-specific. If you don't
specify any memory settings,
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Brett,
On 7/22/2010 1:31 PM, Brett Delle Grazie wrote:
Tomcat 6.0.28 (binary distribution from apache).
My question is, in the Tomcat server.xml, do I require _two_ AJP
connectors as follows:
(executor omitted for simplicity)
!-- AJP
Hi Chris,
Thanks for your quick reply.
*This is entirely up to the JVM, and is not Tomcat-specific. If you don't
specify any memory settings, Tomcat does not add any of its own.*
In a new tomcat domain I haven't added any xms and xmx values. When i went
to the console and i can see Free memory:
On 22/07/2010 15:37, André Warnier wrote:
Mikolaj Rydzewski wrote:
On 07/22/2010 03:49 PM, Martin Gainty wrote:
//i wasnt able to determine JMX ability to schedule a specific task
for a specific time?
I was referring to Andre's sentence:
[using database] makes it easier to
Christopher Schultz wrote:
Oh, and one more thing: any in-memory solution you come up with (that
is, without writing to a database) is likely to suffer from loss of jobs
in the event of a crash or poorly-coded exception-handling.
This isn't necessarily a case for using a separate process just
Here is my server.xml. It is default.
?xml version='1.0' encoding='utf-8'?
!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The
Hi,
I am currently using apache tomcat 5.5 using mod_jk to connect with apache
2.2.
I am curious to understand how the AJP 1.3 connector works. Basically I
would like to know if maxThreads attribute has the same meaning with the AJP
connector as it does with standard HTTP connectors. I would
any takers for this Q???
On Thu, Jul 15, 2010 at 1:38 PM, Ashish Jain ashja...@gmail.com wrote:
Hi,
I have an application which uses non interactive login and hence utilizes
NONLogin Authenticator in tomcat. Here is a snippet from web.xml.
context-param
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