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Posted to users@tomcat.apache.org by suchitha koneru <su...@gmail.com> on 2007/03/09 01:38:49 UTC
unable to launch a servlet using tomcat 5.5.20
Hello Tomcat Users ,
I am facing a problem starting a servlet from tomcat's
web.xml . I am using Tomcat 5.5.20. The reason , I am placing this servlet
in tomcat's web.xml instead of a web app is because I want , this servlet to
start before tomcat loads any of the web application contexts. I have java
1.5 on my system
The following is the code for the servlet.
*
public* *class* ActiveMQBrokerServlet *extends* GenericServlet{
BrokerService broker ;
*public* *void* init(ServletConfig config)* **throws* ServletException* *{
*try*{
broker = *new* BrokerService();
System.*out*.println("Starting ActiveMQ Broker Service...");
broker.addConnector(
"tcp://localhost:61616?trace=true&wireFormat.maxInactivityDuration=-1");
broker.start();
System.*out*.println("Active MQ Broker Started at local host port 61616");
}*catch*(Exception e){
e.printStackTrace();
}
}
*public* *void* destroy(){
*try*{
broker.stop();
System.*out*.println("Active MQ Broker Stopped at localhost port 61616");
}*catch*(Exception e){
*throw* *new* RuntimeException(e);
}
}
*public* *void* service(ServletRequest req , ServletResponse resp){
}
}
This servet is specified as follows in tomcat's conf/web.xml
<servlet>
<servlet-name>activemqbroker</servlet-name>
<servlet-class>
com.cisco.cpnm.common.messaging.ActiveMQBrokerServlet
</servlet-class>
<load-on-startup>6</load-on-startup>
</servlet>
For some reason , the servlet is not loaded , and I do not see any error
messages.
The servlet class file and the required jars are placed in
Tomcat/common/lib.
Please let me know, if Iam missing anything.
thanks,
Suchitha.
Re: unable to launch a servlet using tomcat 5.5.20
Posted by Len Popp <le...@gmail.com>.
You can put your initialization code in a ServletContextListener so it
is executed before any servlets are run.
--
Len
On 3/9/07, suchitha koneru <su...@gmail.com> wrote:
> Thank you so much for the response. The reason I am doing this is , because
> , I am using the servlet to start the Active MQ Broker. There are two web
> apps which will connect to the broker. The broker has to start first before
> any of the web apps. Hence I want to load the servlet which starts the
> broker, before any of the webapps get initialized.
>
> is there any other way I can make sure that the broker will start before any
> of the web apps .
> Iam using tomcat 5.5.20 and Java 1.5
>
>
> On 3/8/07, suchitha koneru <su...@gmail.com> wrote:
> >
> > Hello Tomcat Users ,
> > I am facing a problem starting a servlet from
> > tomcat's web.xml . I am using Tomcat 5.5.20. The reason , I am placing
> > this servlet in tomcat's web.xml instead of a web app is because I want ,
> > this servlet to start before tomcat loads any of the web application
> > contexts. I have java 1.5 on my system
> > The following is the code for the servlet.
> >
> > *
> >
> > public
> > **class* ActiveMQBrokerServlet *extends* GenericServlet{
> >
> > BrokerService
> > broker ;
> >
> > *public* *void* init(ServletConfig config)* **throws* ServletException* *{
> >
> >
> > *try*{
> >
> > broker = *new* BrokerService();
> >
> > System.
> > *out*.println("Starting ActiveMQ Broker Service...");
> >
> > broker.addConnector("tcp://localhost:61616?trace=true&wireFormat.maxInactivityDuration=-1"
> > );
> >
> > broker.start();
> >
> > System.
> > *out*.println("Active MQ Broker Started at local host port 61616" );
> >
> > }
> > *catch*(Exception e){
> >
> > e.printStackTrace();
> >
> > }
> >
> > }
> >
> > *public* *void* destroy(){
> >
> > *try*{
> >
> > broker.stop();
> >
> > System.
> > *out*.println("Active MQ Broker Stopped at localhost port 61616" );
> >
> > }
> > *catch*(Exception e){
> >
> > *throw* *new* RuntimeException(e);
> >
> > }
> >
> > }
> >
> > *public* *void* service(ServletRequest req , ServletResponse resp){
> >
> > }
> >
> > }
> >
> > This servet is specified as follows in tomcat's conf/web.xml
> >
> > <servlet>
> > <servlet-name>activemqbroker</servlet-name>
> >
> > <servlet-class>
> > com.cisco.cpnm.common.messaging.ActiveMQBrokerServlet
> > </servlet-class>
> >
> > <load-on-startup>6</load-on-startup>
> > </servlet>
> >
> > For some reason , the servlet is not loaded , and I do not see any error
> > messages.
> >
> > The servlet class file and the required jars are placed in
> > Tomcat/common/lib.
> >
> > Please let me know, if Iam missing anything.
> >
> > thanks,
> >
> > Suchitha.
> >
> >
> >
> >
> >
> >
> >
>
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Re: unable to launch a servlet using tomcat 5.5.20
Posted by suchitha koneru <su...@gmail.com>.
Thank you so much for the response. The reason I am doing this is , because
, I am using the servlet to start the Active MQ Broker. There are two web
apps which will connect to the broker. The broker has to start first before
any of the web apps. Hence I want to load the servlet which starts the
broker, before any of the webapps get initialized.
is there any other way I can make sure that the broker will start before any
of the web apps .
Iam using tomcat 5.5.20 and Java 1.5
On 3/8/07, suchitha koneru <su...@gmail.com> wrote:
>
> Hello Tomcat Users ,
> I am facing a problem starting a servlet from
> tomcat's web.xml . I am using Tomcat 5.5.20. The reason , I am placing
> this servlet in tomcat's web.xml instead of a web app is because I want ,
> this servlet to start before tomcat loads any of the web application
> contexts. I have java 1.5 on my system
> The following is the code for the servlet.
>
> *
>
> public
> **class* ActiveMQBrokerServlet *extends* GenericServlet{
>
> BrokerService
> broker ;
>
> *public* *void* init(ServletConfig config)* **throws* ServletException* *{
>
>
> *try*{
>
> broker = *new* BrokerService();
>
> System.
> *out*.println("Starting ActiveMQ Broker Service...");
>
> broker.addConnector("tcp://localhost:61616?trace=true&wireFormat.maxInactivityDuration=-1"
> );
>
> broker.start();
>
> System.
> *out*.println("Active MQ Broker Started at local host port 61616" );
>
> }
> *catch*(Exception e){
>
> e.printStackTrace();
>
> }
>
> }
>
> *public* *void* destroy(){
>
> *try*{
>
> broker.stop();
>
> System.
> *out*.println("Active MQ Broker Stopped at localhost port 61616" );
>
> }
> *catch*(Exception e){
>
> *throw* *new* RuntimeException(e);
>
> }
>
> }
>
> *public* *void* service(ServletRequest req , ServletResponse resp){
>
> }
>
> }
>
> This servet is specified as follows in tomcat's conf/web.xml
>
> <servlet>
> <servlet-name>activemqbroker</servlet-name>
>
> <servlet-class>
> com.cisco.cpnm.common.messaging.ActiveMQBrokerServlet
> </servlet-class>
>
> <load-on-startup>6</load-on-startup>
> </servlet>
>
> For some reason , the servlet is not loaded , and I do not see any error
> messages.
>
> The servlet class file and the required jars are placed in
> Tomcat/common/lib.
>
> Please let me know, if Iam missing anything.
>
> thanks,
>
> Suchitha.
>
>
>
>
>
>
>
RE: Deployment problem on tomcat
Posted by "Ersoy, Perihan" <Pe...@eu.sony.com>.
This fmt.tld is in WEB-INF/lib
-----Original Message-----
From: Martin Gainty [mailto:mgainty@hotmail.com]
Sent: Friday, March 09, 2007 9:54 PM
To: Tomcat Users List
Subject: Re: Deployment problem on tomcat
verify your .tlds (more specifically the ftm.tld) is located in /WEB-INF
M--
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----- Original Message -----
From: "Ersoy, Perihan" <Pe...@eu.sony.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Friday, March 09, 2007 2:01 PM
Subject: RE: Deployment problem on tomcat
> Tomcat started at port 80 and when I write http://localhost or
> http://localhost:80 I can see tomcat running properly.
> When I write http://localhost/Login/login.jsp or
> http://localhost:80/Login/login.jsp it gives exception that it couldn't
> find ftm.tld in WEB-INF/lib. But this ftm.tld is exist in WEB-INF/lib
> I'm still searching why it doesn't work.
>
>
> -----Original Message-----
> From: suchitha koneru [mailto:suchithakoneru@gmail.com]
> Sent: Friday, March 09, 2007 8:48 PM
> To: Tomcat Users List
> Subject: Re: Deployment problem on tomcat
>
> how are you acessing the jsp files . Acording to your explanation , jsp
> files are placed in
> tomcat/webapps/Login/
>
> assuming taht tomcat is started at 8080 , if you have a jsp called
> hello.jsp, you have to acess it
> as
> http://localhost:8080/Login/hello.jsp.
>
>
>
>
> On 3/9/07, Ersoy, Perihan <Pe...@eu.sony.com> wrote:
>>
>> Hi Everyone,
>> I'm new user on Tomcat. My problem maybe quite simple but I couldn't
>> find the solution. I'm doing some web application by using Struts
>> framework and Tomcat 5.5.17 using eclipse 3.2 IDE.
>> I'm new developer on Struts, so I'm doing to some small coding. I
>> developed some small code in struts document - The name of the
> document
>> is Struts for Dummies -
>> The document explain the deployment like that:
>> In the webapps subfolder in the tomcat create Folder with the
>> application name (My application project name Login, so I created
> Login
>> folder)
>> In the workspace folder select JSP files from WEB-INF folder and copy
>> these jsp to tomcat/webapps/CreatedFolder ( in my situation
>> tomcat/webapps/Login folder)
>> I did it but It gave me
>> HTTP Status 404 - /Login/
>> type Status report
>> message /Login/
>> description The requested resource (/Login/) is not available.
>> Apache Tomcat/5.5.17
>> Error. I searched for the solution in the internet and tried too many
>> ways, but I couldn't solve.
>> May anybody help me.
>> I really need help
>> PS: It might be easy problem, but I couldn't find out the solution
>> Thank you very much
>> Perihan Ersoy
>>
>>
> ************************************************************************
>> The information contained in this message or any of its attachments
> may be
>> confidential and is intended for the exclusive use of the
> addressee(s). Any
>> disclosure, reproduction, distribution or other dissemination or use
> of this
>> communication is strictly prohibited without the express permission of
> the
>> sender. The views expressed in this email are those of the individual
> and
>> not necessarily those of Sony or Sony affiliated companies. Sony
> email is
>> for business use only.
>>
>> This email and any response may be monitored by Sony to be in
> compliance
>> with Sony's global policies and standards
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
> ************************************************************************
> The information contained in this message or any of its attachments may be confidential and is intended for the exclusive use of the addressee(s). Any disclosure, reproduction, distribution or other dissemination or use of this communication is strictly prohibited without the express permission of the sender. The views expressed in this email are those of the individual and not necessarily those of Sony or Sony affiliated companies. Sony email is for business use only.
>
> This email and any response may be monitored by Sony to be in compliance with Sony's global policies and standards
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
************************************************************************
The information contained in this message or any of its attachments may be confidential and is intended for the exclusive use of the addressee(s). Any disclosure, reproduction, distribution or other dissemination or use of this communication is strictly prohibited without the express permission of the sender. The views expressed in this email are those of the individual and not necessarily those of Sony or Sony affiliated companies. Sony email is for business use only.
This email and any response may be monitored by Sony to be in compliance with Sonys global policies and standards
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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Re: Deployment problem on tomcat
Posted by Martin Gainty <mg...@hotmail.com>.
verify your .tlds (more specifically the ftm.tld) is located in /WEB-INF
M--
---------------------------------------------------------------------------
This e-mail message (including attachments, if any) is intended for the use of the individual or entity to which it is addressed and may contain information that is privileged, proprietary , confidential and exempt from disclosure. If you are not the intended recipient, you are notified that any dissemination, distribution or copying of this communication is strictly prohibited.
---------------------------------------------------------------------------
Le présent message électronique (y compris les pièces qui y sont annexées, le cas échéant) s'adresse au destinataire indiqué et peut contenir des renseignements de caractère privé ou confidentiel. Si vous n'êtes pas le destinataire de ce document, nous vous signalons qu'il est strictement interdit de le diffuser, de le distribuer ou de le reproduire.
----- Original Message -----
From: "Ersoy, Perihan" <Pe...@eu.sony.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Friday, March 09, 2007 2:01 PM
Subject: RE: Deployment problem on tomcat
> Tomcat started at port 80 and when I write http://localhost or
> http://localhost:80 I can see tomcat running properly.
> When I write http://localhost/Login/login.jsp or
> http://localhost:80/Login/login.jsp it gives exception that it couldn't
> find ftm.tld in WEB-INF/lib. But this ftm.tld is exist in WEB-INF/lib
> I'm still searching why it doesn't work.
>
>
> -----Original Message-----
> From: suchitha koneru [mailto:suchithakoneru@gmail.com]
> Sent: Friday, March 09, 2007 8:48 PM
> To: Tomcat Users List
> Subject: Re: Deployment problem on tomcat
>
> how are you acessing the jsp files . Acording to your explanation , jsp
> files are placed in
> tomcat/webapps/Login/
>
> assuming taht tomcat is started at 8080 , if you have a jsp called
> hello.jsp, you have to acess it
> as
> http://localhost:8080/Login/hello.jsp.
>
>
>
>
> On 3/9/07, Ersoy, Perihan <Pe...@eu.sony.com> wrote:
>>
>> Hi Everyone,
>> I'm new user on Tomcat. My problem maybe quite simple but I couldn't
>> find the solution. I'm doing some web application by using Struts
>> framework and Tomcat 5.5.17 using eclipse 3.2 IDE.
>> I'm new developer on Struts, so I'm doing to some small coding. I
>> developed some small code in struts document - The name of the
> document
>> is Struts for Dummies -
>> The document explain the deployment like that:
>> In the webapps subfolder in the tomcat create Folder with the
>> application name (My application project name Login, so I created
> Login
>> folder)
>> In the workspace folder select JSP files from WEB-INF folder and copy
>> these jsp to tomcat/webapps/CreatedFolder ( in my situation
>> tomcat/webapps/Login folder)
>> I did it but It gave me
>> HTTP Status 404 - /Login/
>> type Status report
>> message /Login/
>> description The requested resource (/Login/) is not available.
>> Apache Tomcat/5.5.17
>> Error. I searched for the solution in the internet and tried too many
>> ways, but I couldn't solve.
>> May anybody help me.
>> I really need help
>> PS: It might be easy problem, but I couldn't find out the solution
>> Thank you very much
>> Perihan Ersoy
>>
>>
> ************************************************************************
>> The information contained in this message or any of its attachments
> may be
>> confidential and is intended for the exclusive use of the
> addressee(s). Any
>> disclosure, reproduction, distribution or other dissemination or use
> of this
>> communication is strictly prohibited without the express permission of
> the
>> sender. The views expressed in this email are those of the individual
> and
>> not necessarily those of Sony or Sony affiliated companies. Sony
> email is
>> for business use only.
>>
>> This email and any response may be monitored by Sony to be in
> compliance
>> with Sony's global policies and standards
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
> ************************************************************************
> The information contained in this message or any of its attachments may be confidential and is intended for the exclusive use of the addressee(s). Any disclosure, reproduction, distribution or other dissemination or use of this communication is strictly prohibited without the express permission of the sender. The views expressed in this email are those of the individual and not necessarily those of Sony or Sony affiliated companies. Sony email is for business use only.
>
> This email and any response may be monitored by Sony to be in compliance with Sony's global policies and standards
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
RE: Deployment problem on tomcat
Posted by "Ersoy, Perihan" <Pe...@eu.sony.com>.
Tomcat started at port 80 and when I write http://localhost or
http://localhost:80 I can see tomcat running properly.
When I write http://localhost/Login/login.jsp or
http://localhost:80/Login/login.jsp it gives exception that it couldn't
find ftm.tld in WEB-INF/lib. But this ftm.tld is exist in WEB-INF/lib
I'm still searching why it doesn't work.
-----Original Message-----
From: suchitha koneru [mailto:suchithakoneru@gmail.com]
Sent: Friday, March 09, 2007 8:48 PM
To: Tomcat Users List
Subject: Re: Deployment problem on tomcat
how are you acessing the jsp files . Acording to your explanation , jsp
files are placed in
tomcat/webapps/Login/
assuming taht tomcat is started at 8080 , if you have a jsp called
hello.jsp, you have to acess it
as
http://localhost:8080/Login/hello.jsp.
On 3/9/07, Ersoy, Perihan <Pe...@eu.sony.com> wrote:
>
> Hi Everyone,
> I'm new user on Tomcat. My problem maybe quite simple but I couldn't
> find the solution. I'm doing some web application by using Struts
> framework and Tomcat 5.5.17 using eclipse 3.2 IDE.
> I'm new developer on Struts, so I'm doing to some small coding. I
> developed some small code in struts document - The name of the
document
> is Struts for Dummies -
> The document explain the deployment like that:
> In the webapps subfolder in the tomcat create Folder with the
> application name (My application project name Login, so I created
Login
> folder)
> In the workspace folder select JSP files from WEB-INF folder and copy
> these jsp to tomcat/webapps/CreatedFolder ( in my situation
> tomcat/webapps/Login folder)
> I did it but It gave me
> HTTP Status 404 - /Login/
> type Status report
> message /Login/
> description The requested resource (/Login/) is not available.
> Apache Tomcat/5.5.17
> Error. I searched for the solution in the internet and tried too many
> ways, but I couldn't solve.
> May anybody help me.
> I really need help
> PS: It might be easy problem, but I couldn't find out the solution
> Thank you very much
> Perihan Ersoy
>
>
************************************************************************
> The information contained in this message or any of its attachments
may be
> confidential and is intended for the exclusive use of the
addressee(s). Any
> disclosure, reproduction, distribution or other dissemination or use
of this
> communication is strictly prohibited without the express permission of
the
> sender. The views expressed in this email are those of the individual
and
> not necessarily those of Sony or Sony affiliated companies. Sony
email is
> for business use only.
>
> This email and any response may be monitored by Sony to be in
compliance
> with Sony's global policies and standards
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
************************************************************************
The information contained in this message or any of its attachments may be confidential and is intended for the exclusive use of the addressee(s). Any disclosure, reproduction, distribution or other dissemination or use of this communication is strictly prohibited without the express permission of the sender. The views expressed in this email are those of the individual and not necessarily those of Sony or Sony affiliated companies. Sony email is for business use only.
This email and any response may be monitored by Sony to be in compliance with Sony�s global policies and standards
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
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Re: Deployment problem on tomcat
Posted by suchitha koneru <su...@gmail.com>.
how are you acessing the jsp files . Acording to your explanation , jsp
files are placed in
tomcat/webapps/Login/
assuming taht tomcat is started at 8080 , if you have a jsp called
hello.jsp, you have to acess it
as
http://localhost:8080/Login/hello.jsp.
On 3/9/07, Ersoy, Perihan <Pe...@eu.sony.com> wrote:
>
> Hi Everyone,
> I'm new user on Tomcat. My problem maybe quite simple but I couldn't
> find the solution. I'm doing some web application by using Struts
> framework and Tomcat 5.5.17 using eclipse 3.2 IDE.
> I'm new developer on Struts, so I'm doing to some small coding. I
> developed some small code in struts document - The name of the document
> is Struts for Dummies -
> The document explain the deployment like that:
> In the webapps subfolder in the tomcat create Folder with the
> application name (My application project name Login, so I created Login
> folder)
> In the workspace folder select JSP files from WEB-INF folder and copy
> these jsp to tomcat/webapps/CreatedFolder ( in my situation
> tomcat/webapps/Login folder)
> I did it but It gave me
> HTTP Status 404 - /Login/
> type Status report
> message /Login/
> description The requested resource (/Login/) is not available.
> Apache Tomcat/5.5.17
> Error. I searched for the solution in the internet and tried too many
> ways, but I couldn't solve.
> May anybody help me.
> I really need help
> PS: It might be easy problem, but I couldn't find out the solution
> Thank you very much
> Perihan Ersoy
>
> ************************************************************************
> The information contained in this message or any of its attachments may be
> confidential and is intended for the exclusive use of the addressee(s). Any
> disclosure, reproduction, distribution or other dissemination or use of this
> communication is strictly prohibited without the express permission of the
> sender. The views expressed in this email are those of the individual and
> not necessarily those of Sony or Sony affiliated companies. Sony email is
> for business use only.
>
> This email and any response may be monitored by Sony to be in compliance
> with Sony's global policies and standards
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Deployment problem on tomcat
Posted by "Ersoy, Perihan" <Pe...@eu.sony.com>.
Hi Everyone,
I'm new user on Tomcat. My problem maybe quite simple but I couldn't
find the solution. I'm doing some web application by using Struts
framework and Tomcat 5.5.17 using eclipse 3.2 IDE.
I'm new developer on Struts, so I'm doing to some small coding. I
developed some small code in struts document - The name of the document
is Struts for Dummies -
The document explain the deployment like that:
In the webapps subfolder in the tomcat create Folder with the
application name (My application project name Login, so I created Login
folder)
In the workspace folder select JSP files from WEB-INF folder and copy
these jsp to tomcat/webapps/CreatedFolder ( in my situation
tomcat/webapps/Login folder)
I did it but It gave me
HTTP Status 404 - /Login/
type Status report
message /Login/
description The requested resource (/Login/) is not available.
Apache Tomcat/5.5.17
Error. I searched for the solution in the internet and tried too many
ways, but I couldn't solve.
May anybody help me.
I really need help
PS: It might be easy problem, but I couldn't find out the solution
Thank you very much
Perihan Ersoy
************************************************************************
The information contained in this message or any of its attachments may be confidential and is intended for the exclusive use of the addressee(s). Any disclosure, reproduction, distribution or other dissemination or use of this communication is strictly prohibited without the express permission of the sender. The views expressed in this email are those of the individual and not necessarily those of Sony or Sony affiliated companies. Sony email is for business use only.
This email and any response may be monitored by Sony to be in compliance with Sony�s global policies and standards
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Re: slow response from tomcat
Posted by Richard Jones <ri...@imperial.ac.uk>.
Hi Peter,
>> From: Richard Jones [mailto:richard.d.jones@imperial.ac.uk]
>> It appears that after tomcat has been idle for some time, a first
>> request for a page or service can take longer than usual to load or
>> respond. Our particular case is that we are running an application
>> under tomcat that offers some web services, and the calling client is
>> timing out before it gets a response. The response /is/ eventually
>> forthcoming, but extremely delayed.
>
> I assume you've checked for paging traffic on the OS at that point,
> using vmstat, perfmon or $weapon_of_choice depending on your OS?
You assume wrong, but I'll try and get someone who understands that side
of things to help me take a look at it. Are you suggesting that the
problem could be the tomcat allocated memory being written out to disk
after a period of inactivity?
Thanks for your help,
--
Richard
------------------------------------------------------------------------
Richard Jones | t: +44 (0)20 759 [48614 / 41815]
Web & Database | e: richard.d.jones@imperial.ac.uk
Technology Specialist | b: http://chronicles-of-richard.blogspot.com/
Imperial College London |
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RE: slow response from tomcat
Posted by Peter Crowther <Pe...@melandra.com>.
> From: Richard Jones [mailto:richard.d.jones@imperial.ac.uk]
> It appears that after tomcat has been idle for some time, a first
> request for a page or service can take longer than usual to load or
> respond. Our particular case is that we are running an application
> under tomcat that offers some web services, and the calling client is
> timing out before it gets a response. The response /is/ eventually
> forthcoming, but extremely delayed.
I assume you've checked for paging traffic on the OS at that point,
using vmstat, perfmon or $weapon_of_choice depending on your OS?
- Peter
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slow response from tomcat
Posted by Richard Jones <ri...@imperial.ac.uk>.
Hi Folks,
I wonder if someone could give me some advice on a potential problem we
are experiencing with tomcat.
It appears that after tomcat has been idle for some time, a first
request for a page or service can take longer than usual to load or
respond. Our particular case is that we are running an application
under tomcat that offers some web services, and the calling client is
timing out before it gets a response. The response /is/ eventually
forthcoming, but extremely delayed.
One possible cause that we're working on is that tomcat is unloading
from memory some cached information, when it has been idle for some
time, and the delay of this first request is caused by it picking back
up again. Is this a likely scenario? If not, does anyone have any
suggestions as to what might be happening? If so, is there a way that I
can tell tomcat not to clear whatever caches it might have cleared?
Thanks very much for any help you can offer.
Cheers,
--
Richard
------------------------------------------------------------------------
Richard Jones | t: +44 (0)20 759 [48614 / 41815]
Web & Database | e: richard.d.jones@imperial.ac.uk
Technology Specialist | b: http://chronicles-of-richard.blogspot.com/
Imperial College London |
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Re: unable to launch a servlet using tomcat 5.5.20
Posted by David Smith <dn...@cornell.edu>.
Unfortunately there are a lot of developers who'd like to dictate the
load order of servlets. The best answer I or any one else can offer is
don't do it. It's not safe programming and all the servlets that depend
on it will sooner or later need to deal with the chance it isn't
available for some reason.
Can you offer some details of your use case? Maybe there's an
alternative design you haven't considered.
--David
suchitha koneru wrote:
> Hello Tomcat Users ,
> I am facing a problem starting a servlet from
> tomcat's
> web.xml . I am using Tomcat 5.5.20. The reason , I am placing this
> servlet
> in tomcat's web.xml instead of a web app is because I want , this
> servlet to
> start before tomcat loads any of the web application contexts. I have
> java
> 1.5 on my system
> The following is the code for the servlet.
>
> *
>
> public* *class* ActiveMQBrokerServlet *extends* GenericServlet{
>
> BrokerService broker ;
>
> *public* *void* init(ServletConfig config)* **throws*
> ServletException* *{
>
> *try*{
>
> broker = *new* BrokerService();
>
> System.*out*.println("Starting ActiveMQ Broker Service...");
>
> broker.addConnector(
> "tcp://localhost:61616?trace=true&wireFormat.maxInactivityDuration=-1");
>
> broker.start();
>
> System.*out*.println("Active MQ Broker Started at local host port
> 61616");
>
> }*catch*(Exception e){
>
> e.printStackTrace();
>
> }
>
> }
>
> *public* *void* destroy(){
>
> *try*{
>
> broker.stop();
>
> System.*out*.println("Active MQ Broker Stopped at localhost port 61616");
>
> }*catch*(Exception e){
>
> *throw* *new* RuntimeException(e);
>
> }
>
> }
>
> *public* *void* service(ServletRequest req , ServletResponse resp){
>
> }
>
> }
>
> This servet is specified as follows in tomcat's conf/web.xml
>
> <servlet>
> <servlet-name>activemqbroker</servlet-name>
>
> <servlet-class>
> com.cisco.cpnm.common.messaging.ActiveMQBrokerServlet
> </servlet-class>
>
> <load-on-startup>6</load-on-startup>
> </servlet>
>
> For some reason , the servlet is not loaded , and I do not see any error
> messages.
>
> The servlet class file and the required jars are placed in
> Tomcat/common/lib.
>
> Please let me know, if Iam missing anything.
>
> thanks,
>
> Suchitha.
>
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