Re: tomcat connector through cgi-bin?

[Pid]

Jacob Rhoden wrote:

Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Jacob,

Jacob Rhoden wrote:
 
Hi, Has anyone here ever had to use a cgi-bin directory to try and 
connect to tomcat? ie, some script that when run under cgi-bin,

connects and forwards the info to tomcat?



Ugh. This sounds miserable. ;)

 

I cant find much on it, but it would be really handy. (Have a web
server that i cant install a connector in!).



Do you mean that you can't install something like mod_jk? Or, that you
can't use a Tomcat connector with a port number?

You might be able to use proxying (possibly?) already available in your
web server to simply proxy requests to an HTTP connector running in
Tomcat. I think this would be cleaner than a cgi-bin-Tomcat hack.

What is your environment? Perhaps we can come up with a better solution.
  
Its a system where we have no permission on any files except user home 
directories and the cgi-bin directory. So we can run tomcat as a 
non-unprivileged user on a high port, but we need the ability to allow 
files to be served through the apache web server on port 80.


So it has to be something we can install in the cgi-bin directory. In 
the past we have had a perl script to simply make a connection to an app 
server and pass the data through.



There is a very large set of Perl scripts (that have grown to the point 
where its inefficient and unmanageable) that I would like to start 
rationalizing/organizing into a simpler Java app.


Sorry to be so negative, but I'd suggest getting a new webserver then: 
1) hosting is cheap, 2) you can configure the server to do what you 
really need it to do.


There's little point in trying to force a cgi environment to forward 
requests into Tomcat, if your server doesn't support it.


It's a false economy if you spend more than the equivalent hosting cost 
in your time trying to resolve this - not a really a good idea at all.


p


Best Regards,
Jacob




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Re: deploying without a context?

[Pid]

Donal Roantree wrote:
Hi. Sorry this seems so simple but I've been tearing my hair out. I want 
to have my Tomcat application deployed to /AAA/BBB/CCC and browseable at 
www.ABC.com. In the server.xml file I have a Host tag but I don't know 
what I should put into the Context tag. I've been trying Context 
path= docBase=.../Context but Tomcat seems to think that since I 
don't have a path or docBase I must mean that everything is in 
/AAA/BBB/CCC/ROOT which is NOT what I want. Surely this is a very common 
setup. 


What am I doing wrong? Thanks.



You didn't describe your environment, OS, Tomcat version.

ROOT is the special name for the default application for a given host.
You can either deploy a ROOT.war into the hosts appBase, a deployed 
webapp (in the ROOT directory) or you can place a ROOT.xml context file 
(with an appropriate docBase attribute) into the 
'tomcat/conf/Catalina/hostname/' directory.


Regardless, the behaviour you have discovered is the correct and 
intended one.


The 'path' attribute is only used to indicate the webapp/context path, 
in a Context..., when the context is defined in server.xml - which is 
discouraged.



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RE: Named based virtual host redirection

[Darren Kukulka]

Hassan,

All the static content is served by Tomcat anyway...i.e - there is no
content on the Apache web server.

How is the mod_proxy_ajp used?  The doco on Apache org refers to it in a
developer sense, rather than as a web server directive.

-Original Message-
From: Hassan Schroeder [mailto:[EMAIL PROTECTED] 
Sent: 06 March 2007 15:27
To: Tomcat Users List
Subject: Re: Named based virtual host redirection

On 3/6/07, Darren Kukulka [EMAIL PROTECTED] wrote:

 This worked but I want to hide the redirect URL,

and eliminate the doubled network traffic, I hope? :-)

Anyway,

 VirtualHost *:80
 DocumentRoot d:/apache2/htdocs
 ServerName test.abc.co.uk
 ProxyPass / http://fred.abc.co.uk/app1/
 ProxyPassReverse / http://fred.abc.co.uk/app1/
 /VirtualHost

 This almost works, but it only appears to show the html content, not
the
 JSP.  Does anybody have any suggestions how to make this work?

1. move your static content to Tomcat,
2. use mod_proxy_ajp instead of mod_jk

FWIW!
-- 
Hassan Schroeder  [EMAIL PROTECTED]

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Re: Advanced mod_jk router configuration

[Sriram Narayanan]

On 2/28/07, Rainer Jung [EMAIL PROTECTED] wrote:

worker 1 and worker2 distance=0
worker 3 distance=1



Thank you very much.

This worked for us very well.


Regards,

Rainer


-- Sriram

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Possible JSTL/EL bug in 6.0.10

[Gerald Holl]

Hello,

JSTL is not working on Tomcat 6, the JSTL specific code never gets executed.

Consider the following JSP page fragment:

c:forEach var=it items=#{bean.list}
  h:inputText id=ipt value=#{it.name}/
/c:forEach

The list property is a simple java.util.List. A Object[] is not working too.

In the bean the getList() method should be called but this never 
happens. Thus, the it variable is null.


I use the
- JSTL 1.2 from
  https://maven-repository.dev.java.net/repository/jstl/jars/
- JSF 1.2_03 from https://javaserverfaces.dev.java.net/download.html
- Tomcat 6.0.10

cheers,
Gerald

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Re: Possible JSTL/EL bug in 6.0.10

[David Delbecq]

Please provide the full jsp please.
Side note: JSF and non-JSF tags do not mix very well.

En l'instant précis du 07/03/07 11:14, Gerald Holl s'exprimait en ces
termes:
 Hello,

 JSTL is not working on Tomcat 6, the JSTL specific code never gets
 executed.

 Consider the following JSP page fragment:

 c:forEach var=it items=#{bean.list}
   h:inputText id=ipt value=#{it.name}/
 /c:forEach

 The list property is a simple java.util.List. A Object[] is not
 working too.

 In the bean the getList() method should be called but this never
 happens. Thus, the it variable is null.

 I use the
 - JSTL 1.2 from
   https://maven-repository.dev.java.net/repository/jstl/jars/
 - JSF 1.2_03 from https://javaserverfaces.dev.java.net/download.html
 - Tomcat 6.0.10

 cheers,
 Gerald

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Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Sriram Narayanan]

Hi all:

I'd posted sometime ago seeking help for a particular requirement.
Rainer Jung replied to my post. The thread is here
http://thread.gmane.org/gmane.comp.jakarta.tomcat.user/144823

Requirement:
1. Host an application on two tomcat instances.
2. Enable load balancing between these two Tomcat instances.
3. If one Tomcat instance goes down then the other should take over.
4. If the second goes down, then the first should be retried. This
should happen even if the first had failed some time ago.
5. After both the Tomcat instances are retried a number of times, fall
back to yet another Tomcat. This third tomcat could do some special
processing.

Solution:
mod_jk gives us this out of the box.

For load balancing, add the first two Tomcat instances
   worker.router.balance_workers=worker1,worker2

For fail over between the two instances, do nothing extra

For making only the first one work, and to use the second instance
only for fail over, mark the second instance as disabled.
worker.worker2.activation=disabled

For ensuring that mod_jk tries both the Tomcat instances a specified
number of times before moving to the third Tomcat instance.
ensure that the first two Tomcat instances have the same distance
count, while the Third tomcat instance has a higher distance count.

worker.worker1.distance=0
worker.worker2.distance=0
worker.worker3.distance=1

I've attached the worker.properties file below for reference.

== worker.properties =
# The advanced router LB worker
worker.list=router

# Define a worker using ajp13
worker.worker1.port=8009
worker.worker1.recovery_options=0
worker.worker1.host=192.168.11.26
worker.worker1.type=ajp13
worker.worker1.lbfactor=1
worker.worker1.retries=3
worker.worker1.fail_on_status=600
worker.worker1.distance=0
worker.worker1.mount=/mondrian/*

# Define prefered failover node for worker1
worker.worker1.redirect=worker2

# Define another worker using ajp13
worker.worker2.port=8009
worker.worker2.recovery_options=0
worker.worker2.host=192.168.11.25
worker.worker2.type=ajp13
worker.worker2.lbfactor=1
worker.worker2.retries=3
worker.worker2.fail_on_status=600
worker.worker2.distance=0
worker.worker2.mount=/mondrian/*

# Disable worker2 for all requests except failover. Comment out the
following to enable the 2 node load-balancing
# worker.worker2.activation=disabled

# Define the last resort worker using ajp13
worker.worker3.port=8009
worker.worker3.recovery_options=0
worker.worker3.host=192.168.11.24
worker.worker3.type=ajp13
worker.worker3.lbfactor=1
worker.worker3.retries=3
worker.worker3.fail_on_status=600
worker.worker1.distance=1
worker.worker3.mount=/mondrian/*


# Define the LB worker
worker.router.type=lb
worker.router.sticky_session=0
#worker.router.sticky_session_force=0
worker.router.balance_workers=worker1,worker2
worker.list=jkstatus

# Define a 'jkstatus' worker using status
worker.jkstatus.type=status

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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

This will work if you are only using 1 Apache HTTPD server

Regards

Andrew

On 07/03/2007, at 11:27 AM, Sriram Narayanan wrote:



I'd posted sometime ago seeking help for a particular requirement.
Rainer Jung replied to my post. The thread is here
http://thread.gmane.org/gmane.comp.jakarta.tomcat.user/144823

Requirement:
1. Host an application on two tomcat instances.
2. Enable load balancing between these two Tomcat instances.
3. If one Tomcat instance goes down then the other should take over.
4. If the second goes down, then the first should be retried. This
should happen even if the first had failed some time ago.
5. After both the Tomcat instances are retried a number of times, fall
back to yet another Tomcat. This third tomcat could do some special
processing.

Solution:
mod_jk gives us this out of the box.


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Version: GnuPG v1.4.1 (Darwin)

iD8DBQFF7pTSW126qUNSzvURAjE7AJ4z/2hNk4QqdFirX0liLH0YBDJWVwCfZRwh
bY/ufculwvdURDGYguWx+Gw=
=euml
-END PGP SIGNATURE-

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Re: Named based virtual host redirection

[Pid]

Darren Kukulka wrote:

Hassan,

All the static content is served by Tomcat anyway...i.e - there is no
content on the Apache web server.

How is the mod_proxy_ajp used?  The doco on Apache org refers to it in a
developer sense, rather than as a web server directive.


the pertinent info is actually on the mod_proxy page - it's largely 
config free if you're using it with the Tomcat AJP connector.


 ProxyPass /app ajp://hostname:ajpport/app

You can also use the [p] Proxy directive for mod_rewrite

 RewriteRule  ^/(.+)\.jsp(x?)(.+)*  ajp://hostname:ajpport/$1.jsp$2$3

(...or something, the regex *probably* works)




-Original Message-
From: Hassan Schroeder [mailto:[EMAIL PROTECTED] 
Sent: 06 March 2007 15:27

To: Tomcat Users List
Subject: Re: Named based virtual host redirection

On 3/6/07, Darren Kukulka [EMAIL PROTECTED] wrote:


This worked but I want to hide the redirect URL,


and eliminate the doubled network traffic, I hope? :-)

Anyway,


VirtualHost *:80
DocumentRoot d:/apache2/htdocs
ServerName test.abc.co.uk
ProxyPass / http://fred.abc.co.uk/app1/
ProxyPassReverse / http://fred.abc.co.uk/app1/
/VirtualHost

This almost works, but it only appears to show the html content, not

the

JSP.  Does anybody have any suggestions how to make this work?


1. move your static content to Tomcat,
2. use mod_proxy_ajp instead of mod_jk

FWIW!



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Re: Possible JSTL/EL bug in 6.0.10

[Gerald Holl]

David Delbecq wrote:

Please provide the full jsp please.
Side note: JSF and non-JSF tags do not mix very well.


Here is the full JSP page:

%@ taglib uri=http://java.sun.com/jsf/html; prefix=h%
%@ taglib uri=http://java.sun.com/jsf/core; prefix=f%
%@ taglib prefix=c uri=http://java.sun.com/jstl/core; %

f:view
%@ include file=../doctype.jspf%
html lang=de xmlns=http://www.w3.org/1999/xhtml; xml:lang=de
head
  %@ include file=../header.jspf%
  titleAppname/title
/head
body
div class=data
h:form id=myform
  f:verbatimdiv class=panel/f:verbatim
  f:verbatimdiv class=panelHeader/f:verbatim
  h:commandLink action=#{handler.switch}
styleClass=panelLink
h:graphicImage value=collapsed.png
  rendered=#{handler.collapsed}/
h:graphicImage value=expanded.png
  rendered=#{!handler.collapsed}/
h:outputText value= bla/
  /h:commandLink
  f:verbatim/div/f:verbatim

  h:panelGroup rendered=#{!handler.collapsed}

  c:forEach items=#{handler.fields} var=it
h:inputText id=fieldPercent value=#{it.percentValue}/
h:message for=fieldPercent/
  /c:forEach

  f:verbatimp/f:verbatim
  h:commandButton id=buttonMore value=#{msg.more}
action=#{handler.more}/
  h:commandButton id=buttonDelete value=#{msg.delete}
action=#{handler.delete}/
  f:verbatim/p/f:verbatim

  /h:panelGroup

  f:verbatim/div/f:verbatim

/h:form
/div
/body
/html
/f:view


cheers,
Gerald

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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Sriram Narayanan]

On 3/7/07, Andrew Miehs [EMAIL PROTECTED] wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

This will work if you are only using 1 Apache HTTPD server


Are you referring to the following ?

Two httpd servers with mod_jk pointing to the same two tomcat instances.
httpdA and mod_jkA have a reference to TomcatA and TomcatB
httpdB and mod_jkB have a reference to TomcatA and TomcatB

What would be the complications in such a scenario ?

I can think of situation where mod_jkA does not know of mod_jkB's
status and vice-versa.

In such a case, let's assume that TomcatA is down and that mod_jkB
learns of this. And that mod_jk A has not yet contacted TomcatA.

For long running requests, it would definitely be a problem to learn
of TomcatA being unable to serve requests quite some time after
sending a request to it.

If the processing times on tomcat are low, would it be acceptable for
mod_jkA to learn of the  TomcatA instance being down, updating it's
internal list with this info,  and then redirecting the request to
tomcatB.

This is all that I could think of. If there's something else that we
should be knowing, please do write back.

Thanks in advance.

-- Sriram

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Re: Possible JSTL/EL bug in 6.0.10

[Per Jonsson]

There is a newer version of the jsf implementation at:
https://javaserverfaces.dev.java.net/servlets/ProjectDocumentList?folderID=7028expandFolder=7028folderID=0

Probably not that but worth checking.

I also read someware that the 1.2 implementation (or parts of it) 
require a valid web.xml with the 2.5 schema, but I can't confirm that, I 
have myself struggling with jsf1.2 and facelets and had some problems 
and suddenly it worked.


/Per Jonsson

Gerald Holl skrev:

David Delbecq wrote:

Please provide the full jsp please.
Side note: JSF and non-JSF tags do not mix very well.


Here is the full JSP page:

%@ taglib uri=http://java.sun.com/jsf/html; prefix=h%
%@ taglib uri=http://java.sun.com/jsf/core; prefix=f%
%@ taglib prefix=c uri=http://java.sun.com/jstl/core; %

f:view
%@ include file=../doctype.jspf%
html lang=de xmlns=http://www.w3.org/1999/xhtml; xml:lang=de
head
  %@ include file=../header.jspf%
  titleAppname/title
/head
body
div class=data
h:form id=myform
  f:verbatimdiv class=panel/f:verbatim
  f:verbatimdiv class=panelHeader/f:verbatim
  h:commandLink action=#{handler.switch}
styleClass=panelLink
h:graphicImage value=collapsed.png
  rendered=#{handler.collapsed}/
h:graphicImage value=expanded.png
  rendered=#{!handler.collapsed}/
h:outputText value= bla/
  /h:commandLink
  f:verbatim/div/f:verbatim

  h:panelGroup rendered=#{!handler.collapsed}

  c:forEach items=#{handler.fields} var=it
h:inputText id=fieldPercent value=#{it.percentValue}/
h:message for=fieldPercent/
  /c:forEach

  f:verbatimp/f:verbatim
  h:commandButton id=buttonMore value=#{msg.more}
action=#{handler.more}/
  h:commandButton id=buttonDelete value=#{msg.delete}
action=#{handler.delete}/
  f:verbatim/p/f:verbatim

  /h:panelGroup

  f:verbatim/div/f:verbatim

/h:form
/div
/body
/html
/f:view


cheers,
Gerald

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Re: Possible JSTL/EL bug in 6.0.10

[David Delbecq]

En l'instant précis du 07/03/07 12:04, Gerald Holl s'exprimait en ces
termes:
 David Delbecq wrote:
 Please provide the full jsp please.
 Side note: JSF and non-JSF tags do not mix very well.

   c:forEach items=#{handler.fields} var=it
 h:inputText id=fieldPercent value=#{it.percentValue}/
 h:message for=fieldPercent/
   /c:forEach
Sorry, should have seen it in your first message:
items=#{handler.fields} -- this expression is not evaluated by
tomcat. In jsp 2.0, expression must have the form
${handler.fields}

You are mixing jstl stuff and jsf stuff. #{} is value binding
expressions used by jsf. Moreover, handler is a JSF managed bean, am not
sure JSF exports it's managed bean as it. They probably are inside a
session/request/application (depend on managed bean) scope Map that can
handle their lifecycle.


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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 07/03/2007, at 12:58 PM, Sriram Narayanan wrote:


On 3/7/07, Andrew Miehs [EMAIL PROTECTED] wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

This will work if you are only using 1 Apache HTTPD server


Are you referring to the following ?

Two httpd servers with mod_jk pointing to the same two tomcat  
instances.

httpdA and mod_jkA have a reference to TomcatA and TomcatB
httpdB and mod_jkB have a reference to TomcatA and TomcatB

What would be the complications in such a scenario ?

I can think of situation where mod_jkA does not know of mod_jkB's
status and vice-versa.


Yep - this is the case I am referring to.

You have moved the problem of load balancing Tomcat to load balancing
HTTPD.

How do you want to load balance httpd? Don't forget, you will need
something to deal with session persistence.

If the Apache HTTPD and tomcat are running on the same machine, you
will probably find it easier to do a 1-1 mapping httpd - tomcat than
the cross over setup that you are currently envisaging.

Regards

Andrew


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=4Tlr
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Tomcat 5.5 with java 1.4.2...

[JT Neville]

I've googled and read the release notes included with the 1.4.2 tomcat 
download.  It references the running.txt doc for more info on doing 
this.  I can't find thiat document or reference in the TC doc's or by 
googling the issue/searching the tomcat forum.

Does anyone have a pointer to what the exact steps are that need to be 
completed to run TC 5.5 with JDK 1.4.2?

Related, is there a doc or FAQ that talks about issues/limitations 
running in this mode?  It's not something I want to do but have to do 
because of 3rd party software constraints.


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getting context path name

[santhoshihrd]

Hi all,
   I have an issue 
I have a context nemed demo with the following configuration
Context path=/demo docBase=webapps/MyWebApp.war 
 debug=0 privileged=true
/Context

I want to get the context name demo in a servlet . I am using Spring
framework. It will be more usefule if I get it in Dispatcher servlet. If I
am deploying the context in / , I should get it as /
Context path=/ docBase=webapps/MyWebApp.war 
 debug=0 privileged=true
/Context

Thanks in advance





-- 
View this message in context: 
http://www.nabble.com/getting-context-path-name-tf3362065.html#a9352868
Sent from the Tomcat - User mailing list archive at Nabble.com.


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Re: Possible JSTL/EL bug in 6.0.10

[Gerald Holl]

David Delbecq wrote:

En l'instant précis du 07/03/07 12:04, Gerald Holl s'exprimait en ces
termes:

David Delbecq wrote:

Please provide the full jsp please.
Side note: JSF and non-JSF tags do not mix very well.

  c:forEach items=#{handler.fields} var=it
h:inputText id=fieldPercent value=#{it.percentValue}/
h:message for=fieldPercent/
  /c:forEach

Sorry, should have seen it in your first message:
items=#{handler.fields} -- this expression is not evaluated by
tomcat. In jsp 2.0, expression must have the form
${handler.fields}


According to [1] the #{} should work with the new unified EL.
If I try your hint I can't view the page anymore:
Error: According to TLD or attribute directive in file, attribute items 
does not accept any expressions.



You are mixing jstl stuff and jsf stuff. #{} is value binding
expressions used by jsf. Moreover, handler is a JSF managed bean, am not
sure JSF exports it's managed bean as it. They probably are inside a
session/request/application (depend on managed bean) scope Map that can
handle their lifecycle.


The handler is not a JSF managed bean, it's a Spring managed bean. I 
think this should work.


cheers,
Gerald

[1] http://java.sun.com/products/jsp/reference/techart/unifiedEL.html

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Re: Tomcat 5.5 with java 1.4.2...

[Markus Schönhaber]

JT Neville wrote:

 I've googled and read the release notes included with the 1.4.2 tomcat
 download.  It references the running.txt doc for more info on doing
 this.  I can't find thiat document or reference in the TC doc's or by
 googling the issue/searching the tomcat forum.

RUNNING.txt should be in the directory where you unpacked Tomcat 5.5.

 Does anyone have a pointer to what the exact steps are that need to be
 completed to run TC 5.5 with JDK 1.4.2?

Here's the relevant snippet from RUNNING.txt:


Running Tomcat With J2SE Version 1.4


(1) Obtain the compat package:

(1.1) Download the compat package from the binary download site:
  http://tomcat.apache.org

  * Or build this package yourself from the source code: see 
BUILDING.txt in this directory.

(2) Unzip the package in $CATALINA_HOME.  It will place the XML
parser APIs and Xerces implementation in the common/endorsed
directory, and the JMX API jar (jmx.jar from Sun) in the bin
directory.

(3) Follow the same directions for starting and stopping the
server as if you were using J2SE 5.0.

 Related, is there a doc or FAQ that talks about issues/limitations
 running in this mode?  It's not something I want to do but have to do
 because of 3rd party software constraints.

AFAIK there are no limitations caused by running Tomcat 5.5 with JDK 1.4.

Regards
  mks


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Re: Tomcat 5.5 with java 1.4.2...

[Pid]

JT Neville wrote:
I've googled and read the release notes included with the 1.4.2 tomcat 
download.  It references the running.txt doc for more info on doing 
this.  I can't find thiat document or reference in the TC doc's or by 
googling the issue/searching the tomcat forum.


RUNNING.txt is in the root of the unzipped download.  It contains all 
you need to know.


Does anyone have a pointer to what the exact steps are that need to be 
completed to run TC 5.5 with JDK 1.4.2?


You'll need to download the 1.4 compatibility packages from:
http://tomcat.apache.org/download-55.cgi

Related, is there a doc or FAQ that talks about issues/limitations 
running in this mode?  It's not something I want to do but have to do 
because of 3rd party software constraints.



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Cannot create resource instance

[Natasha N Wright]

Hi,

I am trying to create a servlet which connects to a oracle database.  My 
servlet is called from an HTML form.  When it is called i recieve a
javax naming exception Cannot create resource instance error.  Please 
can someone advise me what I need to configure? I get no tomcat errors 
on startup.

Thankyou

i am calling the db connection with the following java:
-
Context initial = new InitialContext();
Context envContext = (Context)initial.lookup(java:/comp/env);
DataSource ds = (DataSource)envContext.lookup(jdbc/maindb);
tcon = ds.getConnection();

server.xml (within context)
--
Resource name=jdbc/maindb auth=Container type=javax.sql.DataSource /
 ResourceParams name=jdbc/maindb
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
namefactory/name
valueorg.apache.commons.dbcp.BasicDataSourceFactory/value
/parameter
parameter
nameurl/name
valuejdbc:oracle:[EMAIL PROTECTED]:1512:maindb/value
/parameter
parameter
nameuser/name
valuennw03u/value
/parameter
parameter
namepassword/name
value**/value
/parameter
parameter
namemaxActive/name
value20/value
/parameter
parameter
namemaxIdle/name
value10/value
/parameter
parameter
namemaxWait/name
value-1/value
/parameter
/ResourceParams

web.xml
--
resource-ref
res-ref-namejdbc/maindb/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainer/res-auth
/resource-ref

Jar files in WEB-INF/lib
---
classes12.jar
jasper-compiler.jar
commons-collections-3.1.jar
jasper-runtime.jar
commons-dbcp-1.2.1.jar
jsp-api.jar
commons-dbcp-1.2.jarmysql-connector-java-3.1.8-bin.jar
commons-el.jar
naming-factory-dbcp.jar
commons-pool-1.3.jar
naming-java.jar
jasper-compiler-jdt.jar

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More domains

[Marcell Kiss-Toth]

Hi all,

I'm new to Tomcat (version 5.5) and having a Windows Server 2003. 
Currently the Tomcat runs on port 8080. How can I host multiply domains 
with Tomcat?


I've only done it before with Apache 2.

For example, I have www.homedomain.com and I'd like to have the following:

   * webapps\ROOT - www.homedomain.com

   * webapps\mydomain.com - www.mydomain.com
   * webapps\myseconddomain.com - www.myseconddomain.com


I mean all the domains available on port 80.

(If it's necessary, I can move Tomcat from port 8080 to 80)


Thanks for helping,

Marcell

Re: Cannot create resource instance

[David Smith]

Before we can offer any relevant advice, please let us know which 
version of tomcat you are working with.  There are configuration 
differences between 5.0.x and 5.5.x.


--David

Natasha N Wright wrote:

Hi,

I am trying to create a servlet which connects to a oracle database.  
My servlet is called from an HTML form.  When it is called i recieve a
javax naming exception Cannot create resource instance error.  Please 
can someone advise me what I need to configure? I get no tomcat errors 
on startup.

Thankyou

i am calling the db connection with the following java:
-
Context initial = new InitialContext();
Context envContext = (Context)initial.lookup(java:/comp/env);
DataSource ds = (DataSource)envContext.lookup(jdbc/maindb);
tcon = ds.getConnection();

server.xml (within context)
--
Resource name=jdbc/maindb auth=Container 
type=javax.sql.DataSource /

 ResourceParams name=jdbc/maindb
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
namefactory/name
valueorg.apache.commons.dbcp.BasicDataSourceFactory/value
/parameter
parameter
nameurl/name
valuejdbc:oracle:[EMAIL PROTECTED]:1512:maindb/value
/parameter
parameter
nameuser/name
valuennw03u/value
/parameter
parameter
namepassword/name
value**/value
/parameter
parameter
namemaxActive/name
value20/value
/parameter
parameter
namemaxIdle/name
value10/value
/parameter
parameter
namemaxWait/name
value-1/value
/parameter
/ResourceParams

web.xml
--
resource-ref
res-ref-namejdbc/maindb/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainer/res-auth
/resource-ref

Jar files in WEB-INF/lib
---
classes12.jar
jasper-compiler.jar
commons-collections-3.1.jar
jasper-runtime.jar
commons-dbcp-1.2.1.jar
jsp-api.jar
commons-dbcp-1.2.jar
mysql-connector-java-3.1.8-bin.jar

commons-el.jar
naming-factory-dbcp.jar
commons-pool-1.3.jar
naming-java.jar
jasper-compiler-jdt.jar

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Re: More domains

[rmarra]

I guess this part should be handled by Apache using the connector with
Tomcat. But since Im a newbie either, somebody else for sure can help you
better.

Regards
Roberto




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Re: Cannot create resource instance

[Natasha N Wright]

I am using Tomcat version 4. with JDK 1.4 (quite old i know!)

David Smith wrote:

Before we can offer any relevant advice, please let us know which 
version of tomcat you are working with.  There are configuration 
differences between 5.0.x and 5.5.x.


--David

Natasha N Wright wrote:


Hi,

I am trying to create a servlet which connects to a oracle database.  
My servlet is called from an HTML form.  When it is called i recieve a
javax naming exception Cannot create resource instance error.  Please 
can someone advise me what I need to configure? I get no tomcat errors 
on startup.

Thankyou

i am calling the db connection with the following java:
-
Context initial = new InitialContext();
Context envContext = (Context)initial.lookup(java:/comp/env);
DataSource ds = (DataSource)envContext.lookup(jdbc/maindb);
tcon = ds.getConnection();

server.xml (within context)
--
Resource name=jdbc/maindb auth=Container 
type=javax.sql.DataSource /

 ResourceParams name=jdbc/maindb
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
namefactory/name
valueorg.apache.commons.dbcp.BasicDataSourceFactory/value
/parameter
parameter
nameurl/name
valuejdbc:oracle:[EMAIL PROTECTED]:1512:maindb/value
/parameter
parameter
nameuser/name
valuennw03u/value
/parameter
parameter
namepassword/name
value**/value
/parameter
parameter
namemaxActive/name
value20/value
/parameter
parameter
namemaxIdle/name
value10/value
/parameter
parameter
namemaxWait/name
value-1/value
/parameter
/ResourceParams

web.xml
--
resource-ref
res-ref-namejdbc/maindb/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainer/res-auth
/resource-ref

Jar files in WEB-INF/lib
---
classes12.jar
jasper-compiler.jar
commons-collections-3.1.jar
jasper-runtime.jar
commons-dbcp-1.2.1.jar
jsp-api.jar
commons-dbcp-1.2.jar
mysql-connector-java-3.1.8-bin.jar

commons-el.jar
naming-factory-dbcp.jar
commons-pool-1.3.jar
naming-java.jar
jasper-compiler-jdt.jar

This message has been checked for viruses but the contents of an 
attachment
may still contain software viruses, which could damage your computer 
system:

you are advised to perform your own checks. Email communications with the
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RE: More domains

[Caldarale, Charles R]

 From: Marcell Kiss-Toth [mailto:[EMAIL PROTECTED] 
 Subject: More domains
 
 Currently the Tomcat runs on port 8080. How can I host 
 multiply domains with Tomcat?

Use one Host element for each domain. They will all share the same
Connector elements, since they're all part of the same Engine.

Define a separate appBase directory for each Host, and put the default
app for each domain in the respective appBase as the ROOT directory (or
ROOT.war file).

Check here for details:
http://tomcat.apache.org/tomcat-5.5-doc/config/host.html

You don't need httpd to to this - just configure the Connector for
port 80 instead of 8080.

 - Chuck


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Re: tomcat connector through cgi-bin?

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Jacob,

Jacob Rhoden wrote:
 What is your environment? Perhaps we can come up with a better solution.
   
 Its a system where we have no permission on any files except user home
 directories and the cgi-bin directory. So we can run tomcat as a
 non-unprivileged user on a high port, but we need the ability to allow
 files to be served through the apache web server on port 80.

Hmm. And the system administrator cannot be convinced to add
configuration directives for your virtual host or anything like that? Hmm...

Do you have access to PHP? I think you might be able to get away with a
small PHP script that uses an HTTP include. I think that would be easier
than writing a Perl-based (or worse, C-based) CGI program.

 So it has to be something we can install in the cgi-bin directory. In
 the past we have had a perl script to simply make a connection to an app
 server and pass the data through.

Can you use that one? Or will it not work for Tomcat for some reason?

Using PHP, you should be able to use the HttpMessage
(http://php.net/manual/en/http.HttpRequest.php) object and stuff it with
cookies, headers, parameters, and the request body from the incoming
request. Make the request and stream the result.

Note that I've never tried this and so I could be completely wrong.

- -chris

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iD8DBQFF7teH9CaO5/Lv0PARAkEkAKCP2XAZXdt7rFeIipMnLw3w2j1D/ACfadU9
uYc4R2TqzAZGR2igDXj7G/8=
=1MHZ
-END PGP SIGNATURE-

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Re: getting context path name

[David Smith]

request.getContextPath() should supply what you need.  If the webapp is 
the ROOT webapp, it will return an empty string.  That just makes it 
easy to write stuff like:


img src=${pageContext.request.contextPath}/images/myMasthead.jpg /

If you really need the ROOT webapp to return /, then you'll just have 
to test for an empty string and handle that as a special case.


--David

santhoshihrd wrote:

Hi all,
   I have an issue 
I have a context nemed demo with the following configuration
Context path=/demo docBase=webapps/MyWebApp.war 
 debug=0 privileged=true

/Context

I want to get the context name demo in a servlet . I am using Spring
framework. It will be more usefule if I get it in Dispatcher servlet. If I
am deploying the context in / , I should get it as /
Context path=/ docBase=webapps/MyWebApp.war 
 debug=0 privileged=true

/Context

Thanks in advance



  


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Console Logging

[Peter Kennard]

I have been looking about :)

I have a simple tomcat instance with one webapp in it.  I want to 
turn on high level - type logging to the console for internal 
debugging messages so I know what is happening.  I gather I have to 
put a log4j.properties file in common/classes  I put one I found in a 
howto and nothing happend (no file or change in console output)


I ideally I could turn it on/off (ie internal engine logging) in my 
application to braket things that are a problem.


   turnItOn();
   doSomethingThatBreaks();
   tornItOff();

Thanks in advance.


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Re: More domains

[Pid]

Marcell Kiss-Toth wrote:

Hi all,

I'm new to Tomcat (version 5.5) and having a Windows Server 2003. 
Currently the Tomcat runs on port 8080. How can I host multiply domains 
with Tomcat?


I've only done it before with Apache 2.

For example, I have www.homedomain.com and I'd like to have the following:

   * webapps\ROOT - www.homedomain.com
   * webapps\mydomain.com - www.mydomain.com
   * webapps\myseconddomain.com - www.myseconddomain.com


Firstly, you'll need to define a ROOT webapp for each host.

 * webapps\homedomain.com\ROOT - www.homedomain.com
 * webapps\mydomain.com\ROOT   - www.mydomain.com
 * webapps\myseconddomain.com\ROOT - www.myseconddomain.com

You should Read The Fantastic Manual pages that describe how to 
configure Tomcat Hosts and Contexts:


http://tomcat.apache.org/tomcat-5.5-doc/config/index.html


I mean all the domains available on port 80.
(If it's necessary, I can move Tomcat from port 8080 to 80)


You've half answered you're own question here.
Port 80 is the default for http services, so if you don't intend to 
force people to use a port number in the URL then 80 it is.


p


Thanks for helping,

Marcell




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Re: Tomcat 5.5 with java 1.4.2...

[JT Neville]

Thanks that helped a lot.  Please don't shoot the messenger as someone 
else chose the server OS, but I notice the Windows Service Installer 
download contains everything but the running.txt file.  I've downloaded 
just the zip file and grabbed running.txt now.  Thanks again Markus.

-Original Message-
From: Markus Schönhaber [EMAIL PROTECTED]
To: Tomcat Users List users@tomcat.apache.org
Date: Wed, 7 Mar 2007 14:51:04 +0100
Subject: Re: Tomcat 5.5 with java 1.4.2...

 JT Neville wrote:
 
  I've googled and read the release notes included with the 1.4.2 tomcat
  download.  It references the running.txt doc for more info on doing
  this.  I can't find thiat document or reference in the TC doc's or by
  googling the issue/searching the tomcat forum.
 
 RUNNING.txt should be in the directory where you unpacked Tomcat 5.5.
 


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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Andrew,

Andrew Miehs wrote:
 This will work if you are only using 1 Apache HTTPD server

Really? It looks like it would work to me. Sure, the separate mod_jks
don't know each other's status, but it doesn't matter as they will
quickly find out the status of each Tomcat instance pretty quickly.

- -chris

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qLx+XBYTcKrDRCHdzghPQ0g=
=KPJ6
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Re: Cannot create resource instance

[David Smith]

Then I would point you to

http://tomcat.apache.org/tomcat-4.1-doc/jndi-resources-howto.html
and
http://tomcat.apache.org/tomcat-4.1-doc/jndi-datasource-examples-howto.html

for some excellent information on setting up this stuff.  I don't think 
you have to spec a resource factory as the built-in one for datasources 
is a slightly refactored (package rename only) version of DBCP.  Also, 
the JDBC driver needs to be stored in common/lib of the tomcat 
installation.  Lastly, unless you are directly using the commons-dbcp 
package or the commons-pool package in your code, the 
commons-dbcp-xx.xx.jar and commons-pool.jar are not necessary in WEB-INF.


--David

Natasha N Wright wrote:

I am using Tomcat version 4. with JDK 1.4 (quite old i know!)

David Smith wrote:

Before we can offer any relevant advice, please let us know which 
version of tomcat you are working with.  There are configuration 
differences between 5.0.x and 5.5.x.


--David

Natasha N Wright wrote:


Hi,

I am trying to create a servlet which connects to a oracle 
database.  My servlet is called from an HTML form.  When it is 
called i recieve a
javax naming exception Cannot create resource instance error.  
Please can someone advise me what I need to configure? I get no 
tomcat errors on startup.

Thankyou

i am calling the db connection with the following java:
-
Context initial = new InitialContext();
Context envContext = (Context)initial.lookup(java:/comp/env);
DataSource ds = (DataSource)envContext.lookup(jdbc/maindb);
tcon = ds.getConnection();

server.xml (within context)
--
Resource name=jdbc/maindb auth=Container 
type=javax.sql.DataSource /

 ResourceParams name=jdbc/maindb
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
namefactory/name
valueorg.apache.commons.dbcp.BasicDataSourceFactory/value
/parameter
parameter
nameurl/name
valuejdbc:oracle:[EMAIL PROTECTED]:1512:maindb/value
/parameter
parameter
nameuser/name
valuennw03u/value
/parameter
parameter
namepassword/name
value**/value
/parameter
parameter
namemaxActive/name
value20/value
/parameter
parameter
namemaxIdle/name
value10/value
/parameter
parameter
namemaxWait/name
value-1/value
/parameter
/ResourceParams

web.xml
--
resource-ref
res-ref-namejdbc/maindb/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainer/res-auth
/resource-ref

Jar files in WEB-INF/lib
---
classes12.jar
jasper-compiler.jar
commons-collections-3.1.jar
jasper-runtime.jar
commons-dbcp-1.2.1.jar
jsp-api.jar
commons-dbcp-1.2.jar
mysql-connector-java-3.1.8-bin.jar

commons-el.jar
naming-factory-dbcp.jar
commons-pool-1.3.jar
naming-java.jar
jasper-compiler-jdt.jar

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Retrieve list of all sessions

[Glen Vermeylen]

Hello all,

I've created a management screen which lists all currently logged in users.
This list is kept as a hashmap and is kept in sync with reality in the
following way:

At login-time I put the sessions in a list.
A sessionlistener removes any sessions from this map when sessionDestroyed()
is being called.

It all seems very simple but we noticed that some sessions are remaining in
the list for a few days while that user has different sessions open. (I am
guessing  one per every 100 sessions has this problem).

So either the session list is not in sync anymore with reality or worse:
some sessions are not being cleaned up.

Can anyone help on either how to troubleshoot this, or if there is another
(easier :) ) way to get the currently active sessions?

Thank you,
Glen.

RE: Retrieve list of all sessions

[Caldarale, Charles R]

 From: Glen Vermeylen [mailto:[EMAIL PROTECTED] 
 Subject: Retrieve list of all sessions
 
 I've created a management screen which lists all currently 
 logged in users. This list is kept as a hashmap and is kept
 in sync with reality in the following way:

A HashMap is unsynchronized; does your logic provide the necessary
synchronization for insertions, deletions, *and* retrievals?  If not,
switching to a HashTable might resolve your problem.

Or then again, it might just be a bug, but you didn't tell us the
version of Tomcat you're using, so searching bugzilla would be rather
tedious.

 - Chuck


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Re: Console Logging

[Peter Kennard]

I did what it says here
http://minaret.biz/tips/log4j.html
but no results.

I havn't found other decent instructions yet.
PK


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Apache handling HTTPS forwards to Tomcat HTTP, Tomcat HTTP redirects to HTTPS, loop.

[Mike Grandmaison]

 I found out the specific cause of my problem and now I am looking at 
solutions.  The easiest is to take apache out of the equation and have tomcat 
handle the ssl.  I am on a hosted shared server and I think the reason apache 
is handling the ssl is to take the computational load of encryption off of the 
shared server so I am pretty much stuck in my present situation.

I think the solution that I can implement is modifying the HttpConnector to 
recoignise the difference b/t a request that has come through apache and been 
decrypted from a straight browser request to the http port.  

Has anyone made these modifications to the HttpConnector?  or is there perhaps 
some built in functionality in the HttpConnector that might allow me to do this 
without have to extend or modify it?

Thanks for any advice,
MG

- Original Message 
From: Mike Grandmaison [EMAIL PROTECTED]
To: tomcat-u users@tomcat.apache.org
Sent: Friday, March 2, 2007 2:25:50 PM
Subject: Http Connector Redirect - Not working with Portforwarding on hosted 
solution

Hi,

I am trying to get the 

user-data-constraint
   transport-guaranteeCONFIDENTIAL/transport-guarantee
/user-data-constraint

to
work.  I have it working on my development machine.  The problem is
when I move the code over to the stagging server it does not work.

My
stagging server differs from my dev machine in that port forwarding is
taking place.  Specifically http and https ports for my virtual host
are being forwarded to tomcat. Now what I would expect in this case is
that all I would need to change would be the redirectPort attribute
value of the Http Connector such that it forwards to 443 which the port
forwarding would then forward to the tomcat specific https port.

I have tried that but without
 success.  Has anyone else had this problem and had any luck getting it to work 
under these conditions.

Thank you for any advice,

MG





 

Now that's room service!  Choose from over 150,000 hotels
in 45,000 destinations on Yahoo! Travel to find your fit.
http://farechase.yahoo.com/promo-generic-14795097

Re: Possible JSTL/EL bug in 6.0.10

[David Delbecq]

En l'instant précis du 07/03/07 14:43, Gerald Holl s'exprimait en ces
termes:
 David Delbecq wrote:
 En l'instant précis du 07/03/07 12:04, Gerald Holl s'exprimait en ces
 termes:
 David Delbecq wrote:
 Please provide the full jsp please.
 Side note: JSF and non-JSF tags do not mix very well.
   c:forEach items=#{handler.fields} var=it
 h:inputText id=fieldPercent value=#{it.percentValue}/
 h:message for=fieldPercent/
   /c:forEach
 Sorry, should have seen it in your first message:
 items=#{handler.fields} -- this expression is not evaluated by
 tomcat. In jsp 2.0, expression must have the form
 ${handler.fields}

 According to [1] the #{} should work with the new unified EL.
 If I try your hint I can't view the page anymore:
 Error: According to TLD or attribute directive in file, attribute
 items does not accept any expressions.

[1] unified EL refers to jsp 2.1 specifications, i was referring to 2.0
specifications.
To ensure you are using 2.1 specifications, check mainly that
- your taglib contains jsp-version2.1/jsp-version
- your webapplication is properly configured to use the webapp2.5
specifications. The root element of web.xml should be like
web-app version=2.5 xmlns=http://java.sun.com/xml/ns/javaee;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd;

When this is done, remove JSF stuff and do this inside your body tag:
---
 Just to be sure unified EL works, here is the request parameter named
x: #{param.x}br/
You can change it by requesting
http://server/webapp/jspname.jsp?x=fooBarbr/
Now i will iterate over handler.fieldsbr/
  c:forEach items=#{handler.fields} var=it
Found field with value: #{it.percentValue}
  /c:forEach
---

 The handler is not a JSF managed bean, it's a Spring managed bean. I
 think this should work.
Not sure, but i don't know the inners of spring.

 cheers,
 Gerald

 [1] http://java.sun.com/products/jsp/reference/techart/unifiedEL.html




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Help with exporting SSL certificate

[Yerger, Chad]

I purchased a chained *.SSL cert from Godaddy. I installed it successfully on 
my Tomcat Server(server #1). Now I need to export it and replace another Tomcat 
servers(server #2) self signed cert with the export from server #1.  I tried 
doing the keytool export from server #1 and keytool import into my current 
keystore on server #2 with no success(The keytool process throws no errors). I 
dont get any error messages or anything to track down..the https pages just 
dont load.

What is the proper procedure for doing these exports /imports? Any help is 
appreciated.

Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi Christopher,

Balancing the 2 Tomcats behind one Apache (with sticky sessions) works.

Now you add a second Apache HTTPD. How do you choose which one of these
gets used? You now have the original problem all over again... How do
you load between the two web servers?

Cheers

Andrew

On 07/03/2007, at 4:24 PM, Christopher Schultz wrote:


-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Andrew,

Andrew Miehs wrote:

This will work if you are only using 1 Apache HTTPD server


Really? It looks like it would work to me. Sure, the separate mod_jks
don't know each other's status, but it doesn't matter as they will
quickly find out the status of each Tomcat instance pretty quickly.


-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.1 (Darwin)

iD8DBQFF7u9CW126qUNSzvURAh5+AKCEcI3uKAisPAKhRUuTEMXSHSWzqACffxxx
5YZuzPz+e44Lq4EI3EV+SX8=
=du2M
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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Andrew,

Andrew Miehs wrote:
 Balancing the 2 Tomcats behind one Apache (with sticky sessions) works.
 
 Now you add a second Apache HTTPD. How do you choose which one of these
 gets used? You now have the original problem all over again... How do
 you load between the two web servers?

Perhaps round-robin DNS? That's how I would do it, unless I wanted to
buy a real load balancer like a BigIP.

- -chris

-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.7 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFF7vW79CaO5/Lv0PARAp36AKC/dEjFHuhANbnFdDRf9RdnY3Ew+gCgn0hT
j2/q1J9dDj1XWgl2DEtj/7w=
=V9Ll
-END PGP SIGNATURE-

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RE: Console Logging

[Tim Lucia]

I wrote an application which allows you to modify the running log4j
configuration on the fly.  It's a Struts app, and relies on the fact that
tomcat and all the apps are running out of common/lib/log4j*.jar and
common/classes/log4j.properties.  However, you could add the servlet, jars,
and mappings to a single app if you wish.  I have found it useful for
turning up or down logging levels on a running production system.  It will
revert to your log4j.properties configuration as well, so you can easily go
back to the configured settings when you're done.

I can send you (or anyone else who is interested) the sources and/or war.
PM me off-list.

Tim

 -Original Message-
 From: Peter Kennard [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, March 07, 2007 10:59 AM
 To: Tomcat Users List
 Subject: Re: Console Logging
 
 I did what it says here
 http://minaret.biz/tips/log4j.html
 but no results.
 
 I havn't found other decent instructions yet.
 PK
 
 
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 To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: Redirect question - SOLVED

[Jean-Sebastien Pilon]

Thanks, the connector did it for me.

 -Original Message-
 From: Caldarale, Charles R
 Sent: Tuesday, March 06, 2007 5:44 PM
 To: Tomcat Users List
 Subject: RE: Redirect question
 
  From: Jean-Sebastien Pilon
  Subject: Redirect question
  
  I wish to get rid of apache from the design, is
  there any way I can set it up so it listens on 
  port 80 and redirects to 8080 ? 
 
 Just duplicate your existing Connector in server.xml and change to
 port to 80.  It's fine to have more than one Connector per Engine.
 
 If you're using UNIX/Linux, you could use iptables to do the
 redirection.  
 
  - Chuck
 
 

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Re: More domains

[Marcell Kiss-Toth]

Caldarale, Charles R wrote:
From: Marcell Kiss-Toth [mailto:[EMAIL PROTECTED] 
Subject: More domains


Currently the Tomcat runs on port 8080. How can I host 
multiply domains with Tomcat?



Use one Host element for each domain. They will all share the same
Connector elements, since they're all part of the same Engine.

Define a separate appBase directory for each Host, and put the default
app for each domain in the respective appBase as the ROOT directory (or
ROOT.war file).

Check here for details:
http://tomcat.apache.org/tomcat-5.5-doc/config/host.html

You don't need httpd to to this - just configure the Connector for
port 80 instead of 8080.

 - Chuck
  
I have configured the domain in the server.xml. Localhost is working 
correctly, however I get a blank page for the lately specified domain 
(both version with and without www - I also used Alias tag).


I copied the localhost Host section and replaced the localhost value 
to my domain name. Already created the folders so on. Have no errors, 
just getting a blank page.


The ROOT folder is the same as in the top ROOT folder.

What could be the problem?


Thanks,

Marcell

Re: how to set role for JAASRealm

[olivier nouguier]

Hi
First of all, are you sure a JDBCRealm or a DataSourceRealm do not fill your
needs ?

Secondly, AFAIK when providing a Jaas module to the JaasRealm you just need
to provide the authentication method (LoginModule inteface). You don't have
to manipulate the loginContext, it is the JaasRealm job ...

If you really need to use Jaas:
1: Write your own LoginModule (implementing
java.security.auth.spi.LoginModule)
2: Write a  jaas.conf description file (must be declared with -
Djava.security.auth.config  )
3: The appName (TMSLogin) must reference a valid config in the jaas.conf
4: Configure the context / web.xml file

Hih

On 3/7/07, shahab [EMAIL PROTECTED] wrote:



Hi:
I am trying to implement authentication and authorization using JAASRealm.
(I am following the instruction provided at -
http://tomcat.apache.org/tomcat-6.0-doc/realm-howto.html). However, looks
like the role that I set (in the RolePrincipal) is not taking effect.


I have created a class extending Principal for the role. I am setting the
right name of the role (which I fetch from DB) and add the class to
Subject
as follows -

LoginContext lc = null;

try {
lc = new LoginContext(TMSLogin,
new AuthCallBackHandler(username, password));
} catch (LoginException le) {
..
}

try {
 lc.login();
} catch (LoginException le) {

}

// now I am trying to set the rolePrincipal

Subject mySubject = lc.getSubject();

TMSRoles tmsRoles = new TMSRoles(role);
mySubject.getPrincipals().add(tmsRoles);

I have also made entries in server.xml as follows (i set debug to 0 hoping
for more debug info, TMSLogin is defined in jaas.config in tomcat's conf
directory) -
Realm className=org.apache.catalina.realm.JAASRealm
appName=TMSLogin
userClassNames=tms.core.authentication.TMSPrincipal
roleClassNames=tms.core.authentication.TMSRoles
  debug=0/

my entry in web.xml is the following -
security-constraint
   display-nameAdminConstraint/display-name
   web-resource-collection
   web-resource-nameTMSAdmin/web-resource-name
   descriptionOnly for administrators/description
   url-pattern/admin/*/url-pattern
   http-methodGET/http-method
   http-methodPOST/http-method
   /web-resource-collection
   auth-constraint
   description/
   role-nameADMIN/role-name
   /auth-constraint
 /security-constraint


   security-role
   descriptionADMIN/description
   role-nameADMIN/role-name
   /security-role

the getName() of the TMSRoles instance returns ADMIN, which should allow
url /admin/*.

However, I am still getting HTTP 403.

Please help.

thanx
Shahab
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View this message in context:
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et toi dans la joie.

Re: Help with exporting SSL certificate

[Morris Jones]

Yerger, Chad wrote:

I purchased a chained *.SSL cert from Godaddy. I installed it successfully on 
my Tomcat Server(server #1). Now I need to export it and replace another Tomcat 
servers(server #2) self signed cert with the export from server #1.  I tried 
doing the keytool export from server #1 and keytool import into my current 
keystore on server #2 with no success(The keytool process throws no errors). I 
dont get any error messages or anything to track down..the https pages just 
dont load.

What is the proper procedure for doing these exports /imports? Any help is 
appreciated.


There's not a lot of information from your message to go on, like what 
error do you get from your browser on loading a page, so I kind of have 
to take a guess.


On server 1:
keytool -export -rfc -alias tomcat -file tomcat.cert -storepass changeit

Copy mycertificate.cert to server 2

On server 2:
keytool -delete -alias tomcat -storepass changeit
keytool -import -alias tomcat -storepass changeit -file tomcat.cert

Sorry I can't unwrap the lines there.

Mojo
--
Morris Jones
Monrovia, CA
http://www.whiteoaks.com
Old Town Astronomers http://www.otastro.org

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Re: Console Logging

[Peter Kennard]

Thanks will check out after lunch.  I definately want to use the 
log4j for our apps.


I am assuming the Tomcat internals have very good debug log info like 
why sockets are closed or timed out etc (If I can get them activated 
:)  I dread finding out it might be a windows sockets bug :|


PK

At 13:18 3/7/2007, you wrote:



 I did what it says here
 http://minaret.biz/tips/log4j.html
 but no results.

 I havn't found other decent instructions yet.
 PK


try this one:
http://www.vipan.com/htdocs/log4jhelp.html

with http://minaret... you need to install another jar...

Regards.
FC


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RE: Console Logging

[Peter Kennard]

That is interesting, Certainly for adminstration of many apps it 
would be great to have a good GUI for assigning log files to apps and 
log levels.


but I can't even get any debug output yet, much less tweak 
it.  Everyone warns about the volume of data when it's tured to 11, but:


Where I am:

With an out of the box Tomcat 5.5 install on my workstation (windows XP)
I set level=ALL  on every entry in conf/logging.properties

(no change to files or console print)

I tried setting them to DEBUG and it barfed saying DEBUG was in invalid value.

I set debug=10 on all the entities in the server.xml file

(likewise no change)
if I cd (catalina-home}/logs
grep DEBUG *
I get nothing.  And files arn't that big.  They are logging INFO 
however so they are being written to.


I put the newer version log4j1.3 jars in common/lib as described in a HOWTO.

This did change something, I got less console output and less info in 
the files.


I know it's looking there for catalina-base because if I change the 
server.xml file changes take effect when restarted.


I tried putting in both the log4j.properties and the log4j.xml files 
from the howto page, no change over putting in the jars.


I'm a bit mystified.  too many different sets of instructions and 
interactions I guess.


My problem is I am getting some apparently spontaneous socket 
closings reported by the client and want to find out detail.  All on 
local host, I'm simulating a slow server push application with:


   for(i = 0; i  100; ++i)
   {
   Thread.sleep(200);
   res.getWriter().println(waiting  + i);
   res.flushBuffer();
   }
   res.getWriter().println(done!);
   res.flushBuffer();

Using flushBuffer() makes Transfer-Encoding: chunked chunks in the reply.

My client reports the socket is closed way before the done is 
recived in about 80% of cases.  Otherwise tomcat is sending HTTP 
chunks exactly as expected and to HTTP1.1 spec when it works.  I 
figure on the clinet I should get all the chunks up to the terminal 
chunk \r\n0\r\n before the socket is closed.


I need to figure this out, it's kind of a fundamental basic thing, 
I'm a bit stuck.


PK

At 12:37 3/7/2007, you wrote:

I wrote an application which allows you to modify the running log4j
configuration on the fly.  It's a Struts app, and relies on the fact that
tomcat and all the apps are running out of common/lib/log4j*.jar and
common/classes/log4j.properties.  However, you could add the servlet, jars,
and mappings to a single app if you wish.  I have found it useful for
turning up or down logging levels on a running production system.  It will
revert to your log4j.properties configuration as well, so you can easily go
back to the configured settings when you're done.

I can send you (or anyone else who is interested) the sources and/or war.
PM me off-list.

Tim

 -Original Message-
 From: Peter Kennard [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, March 07, 2007 10:59 AM
 To: Tomcat Users List
 Subject: Re: Console Logging

 I did what it says here
 http://minaret.biz/tips/log4j.html
 but no results.

 I havn't found other decent instructions yet.
 PK




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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Leon Rosenberg]

On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Andrew,

Andrew Miehs wrote:
 Balancing the 2 Tomcats behind one Apache (with sticky sessions) works.

 Now you add a second Apache HTTPD. How do you choose which one of these
 gets used? You now have the original problem all over again... How do
 you load between the two web servers?

Perhaps round-robin DNS? That's how I would do it, unless I wanted to
buy a real load balancer like a BigIP.


Ok, round-robin dns will work.
But it will probably work with pure tomcats too, wouldn't it? If you
round-robin the load between two httpds, why dont you do the same
between two tomcats?
Leon



- -chris

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j2/q1J9dDj1XWgl2DEtj/7w=
=V9Ll
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Re: [Tomcat 5.5.20] How to use JAASRealm ?

[olivier nouguier]

hi,
I can't figure out why you need to extend a JaasRealm ?
This class lives in the server classloader, therein it cannot be and
should definitivly never be accessed from your webapp.
I think that you missunderstand the way to use the JaasRealm. Please look at
my previous post (today) and tell me if it's clear enougth.

HIH



On 2/13/07, Stefan Lecho [EMAIL PROTECTED] wrote:


Hello,

In our project we are using a class that extends JAASRealm. This class is
deployed in Tomcat 5.5.20.

When accessing this class, an exception is generated:
java.lang.NoClassDefFoundError: org/apache/catalina/realm/JAASRealm. By
copying catalina-optional.jar from server\lib to common\lib, the original
exception is no longer generated, but other exceptions are generated.
In order to remove all generated exceptions, I am obliged to copy the
following jars from server\lib to common\lib: catalina.jar,
catalina-cluster.jar, catalina-optional.jar, catalina-storeconfig.jar,
commons-modeler.jar, tomcat-ajp.jar, tomcat-coyote.jar, tomcat-http.jarand
tomcat-util.jar.

Is there another - cleaner - solution to make JAASRealm-derived classes
work
in Tomcat 5.5.20 ?

Regards, Stefan Lecho.





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et toi dans les pleurs.
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et toi dans la joie.

Re: [Tomcat 5.5.20] How to use JAASRealm ?

[olivier nouguier]

Sorry for the double post:

If you really need to use Jaas:
1: Write your own LoginModule (implementing
java.security.auth.spi.LoginModule)
2: Write a  jaas.conf description file (must be declared with -
Djava.security.auth.config  )
3: The appName (TMSLogin) must reference a valid config in the jaas.conf
4: Configure the context / web.xml file


On 3/7/07, olivier nouguier [EMAIL PROTECTED] wrote:


hi,
 I can't figure out why you need to extend a JaasRealm ?
This class lives in the server classloader, therein it cannot be and
should definitivly never be accessed from your webapp.
I think that you missunderstand the way to use the JaasRealm. Please look
at my previous post (today) and tell me if it's clear enougth.

HIH



On 2/13/07, Stefan Lecho [EMAIL PROTECTED] wrote:

 Hello,

 In our project we are using a class that extends JAASRealm. This class
 is
 deployed in Tomcat 5.5.20.

 When accessing this class, an exception is generated:
 java.lang.NoClassDefFoundError: org/apache/catalina/realm/JAASRealm. By
 copying catalina-optional.jar from server\lib to common\lib, the
 original
 exception is no longer generated, but other exceptions are generated.
 In order to remove all generated exceptions, I am obliged to copy the
 following jars from server\lib to common\lib: catalina.jar,
 catalina-cluster.jar, catalina-optional.jar, catalina-storeconfig.jar,
 commons-modeler.jar, tomcat-ajp.jar, tomcat-coyote.jar, tomcat-http.jarand
 tomcat-util.jar .

 Is there another - cleaner - solution to make JAASRealm-derived classes
 work
 in Tomcat 5.5.20 ?

 Regards, Stefan Lecho.




--
Souviens-toi qu'au moment de ta naissance tout le monde était dans la
joie et toi dans les pleurs.
Vis de manière qu'au moment de ta mort, tout le monde soit dans les pleurs
et toi dans la joie.





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et toi dans les pleurs.
Vis de manière qu'au moment de ta mort, tout le monde soit dans les pleurs
et toi dans la joie.

Location to override global error-page

[details]

This seems basic, but apparently not.  A similar question has been
asked recently, and there are a few posts on the web, but the answers
aren't enough to solve my problem.

I am trying to override the global default error page by using
directives such as

  error-page
location/catch_all_errors.html/location
  /error-page

or even

  error-page
error-code404/error-code
location/catch_all_errors.html/location
  /error-page

If I include this in the bottom of my webapps web.xml file, it will
catch 404 errors for requests under my web-app:

http://myhost.com/myWebapp/thisPageDoesNotExist.html

but when I modify the global deployment descripter conf/web.xml, I
cannot catch top-level errors like this one:

http://myhost.com/thisPageDoesNotExist.html

More specifically, as a previous poster pointed out:

http://marc.theaimsgroup.com/?l=tomcat-userm=116059712510694w=2

it will catch the errors and display a blank page, but it won't
display my customized page.

A related problem is that even when I display customized errors under
my webapp, the error-page text displays, but loaded graphics sometimes
do not (it seems to depend on the URL).

At least part of my problem is that I am not sure where to locate the
error page if I create one.  That is, what the root directory is for
the statements:

location/catch_all_errors.html/location
or
locationcatch_all_errors.html/location

Thanks.
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Re: Root context setup

[Jim Goodspeed]

Thank you for the help - this works perfectly.  I do notice that the war
file gets expaned in the webapps directory in a sub-folder called ROOT.
Should I delete the contents of this directory everytime I deploy a new war
file?

On 2/16/07, Caldarale, Charles R [EMAIL PROTECTED] wrote:


 From: Jim Goodspeed [mailto:[EMAIL PROTECTED]
 Subject: Re: Root context setup

 Is there another way to accomplish this though?

Don't put the .war file in Tomcat's directory structure.  Instead, put a
ROOT.xml file in conf/Catalina/[hostname] that contains a Context
element with a docBase attribute that points to the location of the .war
file.

- Chuck


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help with mod_jk autoconfigure

[Todd Nine]

Hi all,
 I'm trying to get the mod_jk auto configuration to work.  I have the
following line in my conf/server.xml  right after the Listeners that are
declared in the default file.  Here is what I have

Listener classname=org.apache.jk.config.ApacheConfig
modJk=/usr/lib/httpd/modules/mod_jk.so/

Here is my server information

Server version: Apache Tomcat/5.5.20
Server built:   Sep 12 2006 10:09:20
Server number:  5.5.20.0
OS Name:Linux
OS Version: 2.6.9-5.ELsmp
Architecture:   i386
JVM Version:1.5.0_10-b03
JVM Vendor: Sun Microsystems Inc.

I receive this stack trace in the catalina log.
WARNING: Catalina.start using conf/server.xml:
java.lang.NullPointerException
   at org.apache.tomcat.util.digester.Digester.createSAXException(
Digester.java:2725)
   at org.apache.tomcat.util.digester.Digester.createSAXException(
Digester.java:2751)
   at org.apache.tomcat.util.digester.Digester.startElement(
Digester.java:1278)
   at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(
AbstractSAXParser.java:533)
   at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement
(AbstractXMLDocumentParser.java:220)
   at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement
(XMLDocumentFragmentScannerImpl.java:872)
   at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
   at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument
(XMLDocumentFragmentScannerImpl.java:368)
   at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(
XML11Configuration.java:834)
   at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(
XML11Configuration.java:764)
   at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(
XMLParser.java:148)
   at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(
AbstractSAXParser.java:1242)
   at org.apache.tomcat.util.digester.Digester.parse(Digester.java
:1561)
   at org.apache.catalina.startup.Catalina.load(Catalina.java:489)
   at org.apache.catalina.startup.Catalina.start(Catalina.java:543)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(
NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
Mar 7, 2007 8:30:30 PM org.apache.catalina.startup.Catalina start


Any idea what's wrong, the exception isn't very helpful.  If I comment out
my line everything is fine.  I'm currently testing it running as root to
avoid any permission or port issue.  Any help would be greatly appreciated.

Thanks,
Todd

Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Leon,

Leon Rosenberg wrote:
 On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:
 Perhaps round-robin DNS? That's how I would do it, unless I wanted to
 buy a real load balancer like a BigIP.
 
 Ok, round-robin dns will work.
 But it will probably work with pure tomcats too, wouldn't it? If you
 round-robin the load between two httpds, why dont you do the same
 between two tomcats?

I suppose we're getting into a semi-philosophical discussion, here,
about where load balancing belongs.

In my opinion, Tomcat is the resource that needs to be load-balanced,
since it's doing most of the work. You want to protect individual
servers from being crushed under the weight of too much traffic.

With no (formal) load balancer and just round-robin DNS, you do not
achieve your goal. By the luck of the draw, all your customers could get
a single server in your server bank. Or, by similar coincidence, only
heavy users might single out a particular server. This is not load
balancing: it's random request (or user, depending on DNS attitude of
the client) distribution.

With Apache httpd out front, mod_jk can monitor the status of the
connected Tomcats and choose the best one for any given request.
Apache httpd is not doing too much work: mostly just copying data
between buffers. This does in fact load balance the two Tomcats. The
question was what to do at this point?.

Well, if Apache httpd goes down, you're completely hosed. So, a solution
would be to setup another Apache httpd in parallel. This way, when one
Apache goes down, the other is available (though not necessarily
reachable when using round-robin DNS). The point is that you are not
100% down. Using round-robin DNS is not load balancing, but it will
increase the robustness of your deployment.

AFAICT, this robustness is not possible using Tomcats only. One needs to
have something like mod_jk working to load balance the app servers. I'd
be glad to hear that Tomcat can offload work to another server in a
cluster, but I have heard nothing about such a feature, so I assume that
it does not exist.

Load balancing pretty much always comes down to either:
1. A single point of failure (Apache httpd, BigIP, or whatever).
or
2. Non-100% reachability (for instance, due to one of the
   round-robin'd web servers going down).

It seems to me that the most robust deployment for a webapp is:

Random request distribution + Apache httpd + lb'd Tomcat

- -chris

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RE: SSL on Tomcat 5 problem.

[Hoa Doan]

WOW!! It worked, all i did now was rename tcnative-1.dll.  
Yes I read the fine print but miss interpret it.  I thought I was using JSSE 
since i used the keytool to generate my own key.  So what i generated is a 
non-APR, but the guide didn't say anything about renaming tcnative-1.dll.
But for curiosity what is tcnative-1.dll used for?

Thank you again,
Hoa

Caldarale, Charles R [EMAIL PROTECTED] wrote:  From: Hoa Doan 
[mailto:[EMAIL PROTECTED] 
 Subject: SSL on Tomcat 5 problem.
 
 I have gone through the steps provided on Tomcat SSL document 
 and generated a .keystore file.

Unfortunately, you didn't look at the fine print.

 Mar 2, 2007 4:24:07 PM org.apache.coyote.http11.Http11AprProtocol init
 INFO: Initializing Coyote HTTP/1.1 on http-443

The above shows that you're using APR; the SSL config for that is quite
different from that of the pure Java connector.  The first paragraph
under the ssl-howto page reads:

IMPORTANT NOTE: This Howto refers to usage of JSSE. When using APR,
Tomcat will use OpenSSL, which uses a different configuration.

If you want to use your existing non-APR SSL config, delete or rename
the tcnative-1.dll in Tomcat's bin directory.  If you want to continue
using APR, read the doc at the following link to configure it:
http://tomcat.apache.org/tomcat-5.5-doc/apr.html#HTTPS

 -  Chuck


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Is APR worth it (for me?)

[Christopher Schultz]

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All,

Apologies for the pretty vague question, but I was wondering if looking
at using APR is worth it for me. To answer that, you'll need to know a
bit about my setup.

I'm running Tomcat 5.5 on Linux, connected via mod_jk 1.2.21 to Apache
httpd 2.0.x.

I try to serve all static content using Apache, so sendFile isn't
exactly going to get me anywhere. I have Apache httpd handle SSL for me,
so increased speed through APR/OpenSSL isn't going to get me anywhere,
either.

However, the APR description page suggests that scalability is improved
through the use of socket-polling -- not something that I generally
think of as performance-enhancing.

Can someone comment on the applicability of APR in my case?

And before anyone asks about skipping Apache httpd altogether, I need it
to switch between multiple parallel Tomcats, so I can't dump it (nor do
I really want to).

Thanks in advance,
- -chris
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RE: Is APR worth it (for me?)

[Caldarale, Charles R]

 From: Christopher Schultz [mailto:[EMAIL PROTECTED] 
 Subject: Is APR worth it (for me?)
 
 However, the APR description page suggests that scalability 
 is improved through the use of socket-polling

The scalability is improved due to not having to keep a thread around
for each persistent HTTP connection.  (The new NIO connector in Tomcat 6
also achieves this.)  Whether or not that aspect improves your
performance due to less context switching, CPU cache loading/unloading,
etc., will depend almost entirely on your workload.

Do you have a simulated production environment where you can just try
the two connectors back-to-back?

 - Chuck


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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Hassan Schroeder]

On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:


Load balancing pretty much always comes down to either:
1. A single point of failure (Apache httpd, BigIP, or whatever).
or
2. Non-100% reachability (for instance, due to one of the
   round-robin'd web servers going down).


At which point you use `ifconfig` to add the failed IP to the working
httpd box and it's back to 100%  :-)

--
Hassan Schroeder  [EMAIL PROTECTED]

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RE: Root context setup

[Caldarale, Charles R]

 From: Jim Goodspeed [mailto:[EMAIL PROTECTED] 
 Subject: Re: Root context setup
 
 Should I delete the contents of this directory everytime I 
 deploy a new war file?

I don't really know if it's required, but I always do (or rather, the
deployment script always does).

 - Chuck


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General mappings in Workers2.properties

[DHARNA, AJAY [AG/1000]]

Hi all, 

I am using apache 2.0.59 and tomcat 5.5.20. I would like to setup a
general mapping in the workers2.properties file that will allow all
contexts that are starting with foo go to a particular tomcat.

So in my worker2.properties file, I have the following setup:

[uri:/foo*]

Those this work - if I tried and hit http://localhost/fooApp - I get the
URL Not Found error. Can some please let me know if I have set this up
right.

Thank you for your help.

Ajay

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RE: SSL on Tomcat 5 problem.

[Caldarale, Charles R]

 From: Hoa Doan [mailto:[EMAIL PROTECTED] 
 Subject: RE: SSL on Tomcat 5 problem.
 
 But for curiosity what is tcnative-1.dll used for?

It's essentially the same code that httpd uses to handle HTTP traffic,
written in C.  Since it's a bit closer to the comm hardware it provides
somewhat better throughput than the pure Java HTTP and AJP connectors in
Tomcat 5.5.  When employed for HTTPS, it's noticeably faster, since it
uses the native code OpenSSL for encryption, rather than Sun's JSSE
logic.  It also reduces the number of threads required for persistent
HTTP connections (using keep-alives), since it employs socket polling
rather than dedicated threads for that purpose (the NIO connector in
Tomcat 6 also uses a poll/select mechanism to avoid dedicated threads).
Whether or not the additional complexity and reduced portability is
worth the performance delta is entirely dependent on your workload and
environment.

 - Chuck


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Installing Apache Portable Runtime on Linux

[DM]

Hi,

I'm tring to install the Apache Portable Runtime on Linux as per the 
instructions here:

http://tomcat.apache.org/tomcat-6.0-doc/apr.html

When I run configure I get the following output

[EMAIL PROTECTED] native]# ./configure
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking for working mkdir -p... yes
Tomcat Native Version: 1.1.8
checking for chosen layout... tcnative
checking for APR... no
configure: error: APR could not be located. Please use the --with-apr option.


I think the problem might be that I have version 0.9.4 of the apr-devel package 
installed, because the installation instructions seem to indicate that I need 
version 1.2+. I tried finding a more up-to-date version of this package for Red 
Hat Enterprise Linux 4 (the system I'm using), but failed.

Can someone tell me whether it is the version of the apr-devel package that is 
causing the install to fail, and if so, where I might get a more up-to-date 
version?

Many Thanks,
DM



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Re: Is APR worth it (for me?)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Chuck,

Caldarale, Charles R wrote:
 From: Christopher Schultz [mailto:[EMAIL PROTECTED] 
 Subject: Is APR worth it (for me?)

 However, the APR description page suggests that scalability 
 is improved through the use of socket-polling
 
 The scalability is improved due to not having to keep a thread around
 for each persistent HTTP connection.

I see.

 The new NIO connector in Tomcat 6 also achieves this.

...without regard to the presence of APR, I would imagine.

 Do you have a simulated production environment where you can just try
 the two connectors back-to-back?

I do, but I don't have a load test scenario right now that I can use to
get some good numbers. We currently serve very light load on a one-box
wonder, so I would imagine that any performance improvement would not be
observable in production today.

- -chris
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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Leon Rosenberg]

On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Leon,




In my opinion, Tomcat is the resource that needs to be load-balanced,
since it's doing most of the work. You want to protect individual
servers from being crushed under the weight of too much traffic.


actually usually the resources behind tomcat doing the most work. In a
good scaling system you have a factor 1:5 or something... 1 DB - 5
APP servers - 25 tomcats... to give an example. But ok, its not
related to the example.



With no (formal) load balancer and just round-robin DNS, you do not
achieve your goal. By the luck of the draw, all your customers could get
a single server in your server bank. Or, by similar coincidence, only
heavy users might single out a particular server. This is not load
balancing: it's random request (or user, depending on DNS attitude of
the client) distribution.


Right, but this is something the tomcat could easily handle itself. By
a filter or a valve. Would mean one more request per client.



With Apache httpd out front, mod_jk can monitor the status of the
connected Tomcats and choose the best one for any given request.
Apache httpd is not doing too much work: mostly just copying data
between buffers. This does in fact load balance the two Tomcats. The
question was what to do at this point?.

Well, if Apache httpd goes down, you're completely hosed. So, a solution
would be to setup another Apache httpd in parallel. This way, when one
Apache goes down, the other is available (though not necessarily
reachable when using round-robin DNS). The point is that you are not
100% down. Using round-robin DNS is not load balancing, but it will
increase the robustness of your deployment.

AFAICT, this robustness is not possible using Tomcats only. One needs to
have something like mod_jk working to load balance the app servers. I'd
be glad to hear that Tomcat can offload work to another server in a
cluster, but I have heard nothing about such a feature, so I assume that
it does not exist.


Maybe, but its not hard to implement, especially if you are
implementing it for one app knowing exactly the load on this app and
the use-cases.



Load balancing pretty much always comes down to either:
1. A single point of failure (Apache httpd, BigIP, or whatever).


Loadbalancers usually come in pairs :-)


or
2. Non-100% reachability (for instance, due to one of the
   round-robin'd web servers going down).

It seems to me that the most robust deployment for a webapp is:

Random request distribution + Apache httpd + lb'd Tomcat


paired firewalls + paired loadbalancers + tomcat cluster.
Performs much better as the above :-) Try it out, give it a chance.

Leon


- -chris



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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

:-)

We just had this discussion last week on the Debian ISP mailing list.

Round Robin DNS is a nasty fix to this problem, and isn't guaranteed  
to work

correctly.

Either a real load balancer (like a BigIP) or some form of Linux HA  
are the

only real ways of dealing with this.

Cheers

Andrew


On 07/03/2007, at 6:26 PM, Christopher Schultz wrote:

Andrew Miehs wrote:
Balancing the 2 Tomcats behind one Apache (with sticky sessions)  
works.


Now you add a second Apache HTTPD. How do you choose which one of  
these
gets used? You now have the original problem all over again...  
How do

you load between the two web servers?


Perhaps round-robin DNS? That's how I would do it, unless I wanted to
buy a real load balancer like a BigIP.



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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1


On 07/03/2007, at 7:47 PM, Leon Rosenberg wrote:


On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:

Perhaps round-robin DNS? That's how I would do it, unless I wanted to
buy a real load balancer like a BigIP.


Ok, round-robin dns will work.
But it will probably work with pure tomcats too, wouldn't it? If you
round-robin the load between two httpds, why dont you do the same
between two tomcats?



You may want to have a look at this

http://homepages.tesco.net/J.deBoynePollard/FGA/dns-round-robin-is- 
useless.html


and

http://en.wikipedia.org/wiki/Round_robin_DNS
Some desktop clients may even try alternate addresses after a  
connection time out of 30-45 seconds.


This behavior is unfortunately not specified - and could be changed  
at any time.


I don't know if I would want to define my failover via a not  
specified mechanism.



Regards

Andrew
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RE: how to set role for JAASRealm

[Page, Steve C.]

Shahab- 

I am hardly an expert, but I have just created a custom principal. Here
is what I learned. The RealmBase class is responsible for creating
principals for the context. Normally, this is just a Principal class.
Since I extended Principal, I also needed to extend BaseRealm. The realm
class must be placed in server/classes. I put the custom principal class
in common/classes so my application can see it as well. No other special
coding was required; I simply had to configure security and define my
realm class to the context.

Extending BaseRealm is not complicated, but I suspect extending
JAASRealm might be. I hope this helps... 

Thanks, Steve
 
-Original Message-
From: shahab [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, March 06, 2007 10:21 PM
To: users@tomcat.apache.org
Subject: how to set role for JAASRealm


Hi: 
I am trying to implement authentication and authorization using
JAASRealm.
(I am following the instruction provided at -
http://tomcat.apache.org/tomcat-6.0-doc/realm-howto.html). However,
looks like the role that I set (in the RolePrincipal) is not taking
effect.


I have created a class extending Principal for the role. I am setting
the right name of the role (which I fetch from DB) and add the class to
Subject as follows -

LoginContext lc = null;

try {
lc = new LoginContext(TMSLogin,
new AuthCallBackHandler(username, password)); } catch
(LoginException le) { ..
}

try {
 lc.login();
} catch (LoginException le) {

}

// now I am trying to set the rolePrincipal

Subject mySubject = lc.getSubject();

TMSRoles tmsRoles = new TMSRoles(role);
mySubject.getPrincipals().add(tmsRoles);

I have also made entries in server.xml as follows (i set debug to 0
hoping for more debug info, TMSLogin is defined in jaas.config in
tomcat's conf
directory) - 
Realm className=org.apache.catalina.realm.JAASRealm 
appName=TMSLogin   
userClassNames=tms.core.authentication.TMSPrincipal 
roleClassNames=tms.core.authentication.TMSRoles 
  debug=0/ 

my entry in web.xml is the following -
security-constraint 
   display-nameAdminConstraint/display-name 
   web-resource-collection 
   web-resource-nameTMSAdmin/web-resource-name 
   descriptionOnly for administrators/description 
   url-pattern/admin/*/url-pattern 
   http-methodGET/http-method 
   http-methodPOST/http-method 
   /web-resource-collection 
   auth-constraint 
   description/ 
   role-nameADMIN/role-name 
   /auth-constraint 
 /security-constraint 


   security-role 
   descriptionADMIN/description 
   role-nameADMIN/role-name 
   /security-role 

the getName() of the TMSRoles instance returns ADMIN, which should
allow url /admin/*. 

However, I am still getting HTTP 403. 

Please help. 

thanx
Shahab
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RE: how to set role for JAASRealm

[Caldarale, Charles R]

 From: Page, Steve C. [mailto:[EMAIL PROTECTED] 
 Subject: RE: how to set role for JAASRealm
 
 Since I extended Principal, I also needed to extend 
 BaseRealm.

That doesn't necessarily follow.  We're using custom Principal,
RolePrincipal, and LoginModule classes with Tomcat's standard JAASRealm.

 - Chuck


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Re: Possible JSTL/EL bug in 6.0.10

[Rémy Maucherat]

On 3/7/07, David Delbecq [EMAIL PROTECTED] wrote:

[1] unified EL refers to jsp 2.1 specifications, i was referring to 2.0
specifications.
To ensure you are using 2.1 specifications, check mainly that
- your taglib contains jsp-version2.1/jsp-version
- your webapplication is properly configured to use the webapp2.5
specifications. The root element of web.xml should be like
web-app version=2.5 xmlns=http://java.sun.com/xml/ns/javaee;
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance;
xsi:schemaLocation=http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd;


I would be ok to spend the time to look at it (just in case) if Gerald
sends me a ready to run WAR (please include the JSF and JSTL JARs in
lib) privately at my gmail address.

Rémy

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Re: Is APR worth it (for me?)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rémy,

Rémy Maucherat wrote:
 The scalability improvement is twofold for AJP:
 - when running many Apache frontend servers (each with a sizeable
 number of workers), Tomcat would need a huge amount of AJP worker
 threads with the java.io connector

Makes sense. So, instead of a Java thread waiting in every single ajp
connection, you're using one native listener thread waiting on a
select(), right? It's sad that you can't do this in Java :(

 - threads will only be used for actually executing requests, thus
 making concurrency in business logic a bit more predictable (if you
 have 2000 threads, it's ok most of the time, as long as no lock gets
 contested by too many threads, in which case it's far better if you
 had only 200 threads)

Definitely. Unless I'm mistaken, Java threads on Linux are pthreads,
which are relatively heavy. Reducing them is certainly going to reduce
memory, thread counts (wrt system limits), and thread dump lengths.

 It also saves memory (no surprise). Socket polling will only be used
 for keepalive: during the processing of a request, the connector uses
 regular blocking IO.

Cool. So, it /does/ sound like something worth looking into. APR
installation looks like a snap, too, so it shouldn't be painful at all.

Thanks for the explanation, Rémy.

- -chris
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RE: Is APR worth it (for me?)

[Caldarale, Charles R]

 From: Christopher Schultz [mailto:[EMAIL PROTECTED] 
 Subject: Re: Is APR worth it (for me?)
 
 Makes sense. So, instead of a Java thread waiting in every single ajp
 connection, you're using one native listener thread waiting on a
 select(), right? It's sad that you can't do this in Java :(

You can, but only with NIO, not with the older comm APIs.

 - Chuck


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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

-BEGIN PGP SIGNED MESSAGE-
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Leon,

Leon Rosenberg wrote:
 On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:
 Load balancing pretty much always comes down to either:
 1. A single point of failure (Apache httpd, BigIP, or whatever).
 
 Loadbalancers usually come in pairs :-)

Er, you can buy a single load balancer off the shelf. One input port,
many output ports (virtually, that is). It's not uncommon to see a
single device acting as a load balancer.

Load-balanced /resources/, on the other hand, generally come in
multiples (otherwise, what's the point?).

If you had a pair of load balancers, how would you pick which one
handles the request? ... R-R DNS, anyone?

 It seems to me that the most robust deployment for a webapp is:

 Random request distribution + Apache httpd + lb'd Tomcat
 
 paired firewalls + paired loadbalancers + tomcat cluster.
 Performs much better as the above :-) Try it out, give it a chance.

But the request has to come from somewhere and go to a single device. If
you have pairs of things, you have to divide the traffic, which brings
me back to R-R DNS. Otherwise, you have a set of hardware that never
gets used.

There's always the possibility of redirecting to another machine name,
such as rack0.foo.com versus rack1.foo.com, each of which point to a
particular piece of load-balancing hardware (or logical equivalent such
as a firewall /in front/ of a load balancer).

I'm not sure how your better layout is any different than mine, except
that you've replaced Apache-httpd-based-load-balancing with what looks
like appliance-based-load-balancing and put firewalls out front (which
is logically insignificant).

- -chris

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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

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Andrew,

Andrew Miehs wrote:
 We just had this discussion last week on the Debian ISP mailing list.
 
 Round Robin DNS is a nasty fix to this problem, and isn't guaranteed
 to work correctly.

Certainly not. But it's one way to /actually/ divide requests between
physical hardware devices.

 Either a real load balancer (like a BigIP) or some form of Linux HA
 are the only real ways of dealing with this.

I totally agree. A single BigIP is a single point of failure, though.
R-R DNS with multiple BigIPs is better than single IP - single BigIP, no?

- -chris

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RE: More domains

[Caldarale, Charles R]

 From: Marcell Kiss-Toth [mailto:[EMAIL PROTECTED] 
 Subject: Re: More domains
 
 The ROOT folder is the same as in the top ROOT folder.

I don't really understand the above statement. What do you mean by top
ROOT folder? The appBase settings for the two Host elements should be
completely independent.

 - Chuck


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Re: [OT] General mappings in Workers2.properties

[fredk2]

Hi,

Workers2.properties was used for mod_jk2.  This product is not maintained
anymore. Use mod_jk which is actively maintained by some cool developer(s)
:-)  It is much better documented and featured.

see http://tomcat.apache.org/connectors-doc/

Rgds, FredK
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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Christopher Schultz]

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Andrew,

Andrew Miehs wrote:
 You may want to have a look at this
 
 http://homepages.tesco.net/J.deBoynePollard/FGA/dns-round-robin-is-useless.html

No offense taken, but I wasn't (as the author of this piece asserts)
claiming that R-R DNS is an effective load balancer. In fact, I have
said quite the opposite: load balancing is best done by a component
which actually understands loads:

1. mod_jk (right? I've never done it)
2. BigIP or some other hardware load balancer

The /only/ reason, IMO, to ever use R-R DNS is to avoid single points of
failure. The author claims that there is no reason, ever (ever ever
ever) to use R-R DNS. I respectfully disagree.

If your client attempts to lookup www.foo.com, it resolves to a single
IP address, which points to a single piece of hardware in your data
center, you might be screwed by:

1. Faulty wiring that happens to go bad at an inconvenient time.
2. Faulty hardware device (fw, lb, switch, anything) that dies.
3. Network or power going down (which is a stretch, since data
   centers are pretty good at keeping the lights on)

R-R DNS allows you to /partially/ weather this storm by diverting an
unpredictable amount of traffic to another hardware device (possibly in
another data center, which gets you around all of the above).

Sure, some of your clients won't be able to connect. But, not /all/ of
them will be denied service.

This author claims that the following foundations are flawed reasons
for using R-R DNS. Note that I do not claim a single one of them:

1. Shuffling resource records affects client connection behavior.
   (I don't care... my only assumption is that not every client can
possibly conspire to choose the same IP address every single time).
2. Shuffling resource records provides even or predictable distribution
   (I don't care... it's enough that not all requests go to the same
place. The distribution is is irrelevant, as long as not every
single request goes to the same IP every time).

The whole point is that you have to suffer 100% loss of your frontend
hardware in order to shut off 100% of your users. This is true no matter
how many points of failure you have... it's just that 1 point if
failure means that only one device has to go. If you have a dozen lb's
(or fw's with lb's, as Leon suggests), then losing 1 device loses you a
completely unpredictable 1/12th of your users. If R-R DNS works
perfectly (which it doesn't), then you still lose 1/12th of all
requests. But the worst case simply can't be that 1 of 12 servers going
down results in 100% request loss.

I am unaware of any other strategy which allows you to lose a primary
piece of hardware such as a load balancer and still be able to limp
along with at least /some/ requests going through.

I'm open to suggestions. (And SRV doesn't count, since not a single web
browser supports them).

- -chris

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Kerberose+tomcat

[Dhanunjay kumar]

Hello All,
i want to use Single Sign On for my application,to achive this i need to use
kerberose.

how to use krb5LoginModule.


thanks for your understanding.
Regards
Kumar.

When webapps/ROOT does not exist the status code is 400 instead of 404, why?

[fredk2]

Hi,

In Tomcat 5.5.16 - I forgot to define a context xml file for my application
and got status error code 400 which was puzzling.  After I added a ROOT
subdirectory to my webapps directory I got the status code 404, which was
less confusing.

Questions:
- I checked the http://tomcat.apache.org site but cannot find documentation
for ROOT. Is there any? 
- why code 400 and not 404 ?

Many thanks - Fred


Test:

Before ROOT was created:
---
bash$ telnet localhost 8080
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /test HTTP/1.1
Host: localhost

HTTP/1.1 400 No Host matches server name localhost
Server: Apache-Coyote/1.1
Transfer-Encoding: chunked
Date: Wed, 07 Mar 2007 23:45:04 GMT
Connection: close


After ROOT was created:
---
bash-2.04$ telnet localhost 8080
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /test HTTP/1.1
Host: localhost

HTTP/1.1 404 /test
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=utf-8
Content-Length: 986
Date: Thu, 08 Mar 2007 00:48:46 GMT

 error html from tomcat 



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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Andrew Miehs]

-BEGIN PGP SIGNED MESSAGE-
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On 08/03/2007, at 1:28 AM, Christopher Schultz wrote:




Either a real load balancer (like a BigIP) or some form of Linux HA
are the only real ways of dealing with this.


I totally agree. A single BigIP is a single point of failure, though.
R-R DNS with multiple BigIPs is better than single IP - single  
BigIP, no?


IMHO, not really. If you need two devices load balancers to deal with  
your

current load, then you already have a problem.

We run our BigIPs Active/Standby - and when the one BigIP dies, the  
other
takes over the 'VIPs' - virtual ips - from the other box. The one IP  
address

points to a floating address which is shared by the load balancer.

HA solutions work the same way, moving a floating addresses between the
multiple boxes...

Andrew
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Tomcat process on windows

[Hernâni Cerqueira]

Hello all,

I have a little curiosity, that may seem trivial for some of you. I 
usually do my work on linux, but sometime I work on a laptop that runs 
windows, and because i do lots of application reloads using tomcat 
manager, i usually ran out of memory, and then it comes the PermGem 
space exception. Then i have to go to task manager and kill the tomcat 
process because it wont even stop using regular ways, and restart again. 
But the strange is that sometimes i got a tomcat5 and a tomcat5w process 
using the memory, and some other times i got a javaw process. Can anyone 
tell me why this happens? It's not a annoying problem, is just a bit 
strange for me...


Cheer's,
Hernâni

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Re: More domains

[Marcell Kiss-Toth]

From: Marcell Kiss-Toth [mailto:[EMAIL PROTECTED] 
Subject: Re: More domains


The ROOT folder is the same as in the top ROOT folder.



I don't really understand the above statement. What do you mean by top
ROOT folder? The appBase settings for the two Host elements should be
completely independent.
I mean that I copied the entire webapps\ROOT folder to 
webapps\mydomain.com\ROOT.


The Host configuration looks like the following (server.xml):

 Host name=www.mydomain.com appBase=together.hu
  unpackWARs=true autoDeploy=true
  xmlValidation=false xmlNamespaceAware=false

   Aliasmydomain.com/Alias

   ... (the same as for the localhost)
 /Host

So localhost's working but for mydomain.com I only get a blank page 
(alias is working too). What could be wrong?


Thanks,

Marcelll

Re: Console Logging

[Peter Kennard]

BTW found the bug it wasn't in tomcat ;^ but in the client :)
In any case the logger info was very helpful!
PK

At 13:18 3/7/2007, you wrote:


 I did what it says here
 http://minaret.biz/tips/log4j.html
 but no results.

 I havn't found other decent instructions yet.
 PK


try this one:
http://www.vipan.com/htdocs/log4jhelp.html

with http://minaret... you need to install another jar...

Regards.
FC




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RE: Tomcat process on windows

[Caldarale, Charles R]

 From: Hernâni Cerqueira [mailto:[EMAIL PROTECTED] 
 Subject: Tomcat process on windows
 
 But the strange is that sometimes i got a tomcat5 and a 
 tomcat5w process using the memory, and some other times
 i got a javaw process. 

The tomcat5 process is Tomcat running as a Windows service.

The tomcat5w process is the Tomcat service manager program, not Tomcat itself.

A javaw process is a special Windows-only launcher that does not create a 
command prompt window for the target Java application; it's intended primarily 
for GUI apps.  As far as I can tell, it is not used by any of the standard 
Tomcat scripts.

 - Chuck


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Re: tomcat connector through cgi-bin?

[Jacob Rhoden]

Pid wrote:
I'd suggest getting a new webserver then: 1) hosting is cheap, 2) you 
can configure the server to do what you really need it to do.


There's little point in trying to force a cgi environment to forward 
requests into Tomcat, if your server doesn't support it.


It's a false economy if you spend more than the equivalent hosting 
cost in your time trying to resolve this - not a really a good idea at 
all.


I agree, that is the best option, and that is the most logical thing! 
However there are external issues which prevent this from happening 
right now *sigh*! I would like to work in a place where the 
cheapest/best thing is the thing that can be done!


Anyway, In case anyone is interested, I have now written a perl script 
which does exactly that. So if anyone needs a perl tomcat connector 
send me an email. (:


Best Regards,
Jacob

__

Jacob Rhoden - http://www.jacobrhoden.com/


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Re: Location to override global error-page

[Peter Kennard]

I would actually LOVE to have errors directed to a servlet like 
interface to reply to the client.  In my case we are going to be 
routing requests from a lot of mobile devices using a compressed form 
for traffic.

PK

At 14:05 3/7/2007, you wrote:


This seems basic, but apparently not.  A similar question has been
asked recently, and there are a few posts on the web, but the answers
aren't enough to solve my problem.

I am trying to override the global default error page by using
directives such as

  error-page
location/catch_all_errors.html/location
  /error-page

or even

  error-page
error-code404/error-code
location/catch_all_errors.html/location
  /error-page

If I include this in the bottom of my webapps web.xml file, it will
catch 404 errors for requests under my web-app:

http://myhost.com/myWebapp/thisPageDoesNotExist.html

but when I modify the global deployment descripter conf/web.xml, I
cannot catch top-level errors like this one:

http://myhost.com/thisPageDoesNotExist.html

More specifically, as a previous poster pointed out:

http://marc.theaimsgroup.com/?l=tomcat-userm=116059712510694w=2

it will catch the errors and display a blank page, but it won't
display my customized page.

A related problem is that even when I display customized errors under
my webapp, the error-page text displays, but loaded graphics sometimes
do not (it seems to depend on the URL).

At least part of my problem is that I am not sure where to locate the
error page if I create one.  That is, what the root directory is for
the statements:

location/catch_all_errors.html/location
or
locationcatch_all_errors.html/location

Thanks.
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Re: [OT] getting context path name

[santhoshihrd]

David,
   Many thanks. This was the sort of solution I was searching for. It is
working fine
Santhosh




David Smith-2 wrote:
 
 request.getContextPath() should supply what you need.  If the webapp is 
 the ROOT webapp, it will return an empty string.  That just makes it 
 easy to write stuff like:
 
  ${pageContext.request.contextPath}/images/myMasthead.jpg 
 
 If you really need the ROOT webapp to return /, then you'll just have 
 to test for an empty string and handle that as a special case.
 
 --David
 
 santhoshihrd wrote:
 Hi all,
I have an issue 
 I have a context nemed demo with the following configuration
 Context path=/demo docBase=webapps/MyWebApp.war 
  debug=0 privileged=true
 /Context

 I want to get the context name demo in a servlet . I am using Spring
 framework. It will be more usefule if I get it in Dispatcher servlet. If
 I
 am deploying the context in / , I should get it as /
 Context path=/ docBase=webapps/MyWebApp.war 
  debug=0 privileged=true
 /Context

 Thanks in advance



   
 
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RE: More domains

[Caldarale, Charles R]

 From: Marcell Kiss-Toth [mailto:[EMAIL PROTECTED] 
 Subject: Re: More domains
 
 I mean that I copied the entire webapps\ROOT folder to 
 webapps\mydomain.com\ROOT.

Why did you pick that location when the appBase for the www.mydomain.com
Host is together.hu?  Your default app should be in together.hu/ROOT.

   Host name=www.mydomain.com appBase=together.hu
unpackWARs=true autoDeploy=true
xmlValidation=false xmlNamespaceAware=false
 Aliasmydomain.com/Alias
 ... (the same as for the localhost)
   /Host

 - Chuck


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Re: Is APR worth it (for me?)

[Peter Kennard]

Doesn't AJP multiplex traffic, that is queued 
up requests are serialized through one 
connection that remains connected and it switches 
between servlets on the receiving end? and recycles the execution thread?


At 19:19 3/7/2007, you wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rémy,

Rémy Maucherat wrote:
 The scalability improvement is twofold for AJP:
 - when running many Apache frontend servers (each with a sizeable
 number of workers), Tomcat would need a huge amount of AJP worker
 threads with the java.io connector

Makes sense. So, instead of a Java thread waiting in every single ajp
connection, you're using one native listener thread waiting on a
select(), right? It's sad that you can't do this in Java :(

 - threads will only be used for actually executing requests, thus
 making concurrency in business logic a bit more predictable (if you
 have 2000 threads, it's ok most of the time, as long as no lock gets
 contested by too many threads, in which case it's far better if you
 had only 200 threads)

Definitely. Unless I'm mistaken, Java threads on Linux are pthreads,
which are relatively heavy. Reducing them is certainly going to reduce
memory, thread counts (wrt system limits), and thread dump lengths.

 It also saves memory (no surprise). Socket polling will only be used
 for keepalive: during the processing of a request, the connector uses
 regular blocking IO.

Cool. So, it /does/ sound like something worth looking into. APR
installation looks like a snap, too, so it shouldn't be painful at all.

Thanks for the explanation, Rémy.

- -chris
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Re: Tomcat process on windows

[Hernâni Cerqueira]

Caldarale, Charles R escreveu:

As far as I can tell, it is not used by any of the standard Tomcat scripts.
  
Someone uses it ;-) ... But that isn't a problem. Thanks for a good 
ansewr to a silly question.


Hernâni

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Re: Another howto: Load Balancer + fail over (two active Tomcats, one backup Tomcat)

[Leon Rosenberg]

On 3/8/07, Christopher Schultz [EMAIL PROTECTED] wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Leon,

Leon Rosenberg wrote:
 On 3/7/07, Christopher Schultz [EMAIL PROTECTED] wrote:
 Load balancing pretty much always comes down to either:
 1. A single point of failure (Apache httpd, BigIP, or whatever).

 Loadbalancers usually come in pairs :-)

Er, you can buy a single load balancer off the shelf. One input port,
many output ports (virtually, that is). It's not uncommon to see a
single device acting as a load balancer.

Load-balanced /resources/, on the other hand, generally come in
multiples (otherwise, what's the point?).

If you had a pair of load balancers, how would you pick which one
handles the request? ... R-R DNS, anyone?


one is active one is standby. Same applies to the firewall and the switches.



 It seems to me that the most robust deployment for a webapp is:

 Random request distribution + Apache httpd + lb'd Tomcat

 paired firewalls + paired loadbalancers + tomcat cluster.
 Performs much better as the above :-) Try it out, give it a chance.

But the request has to come from somewhere and go to a single device. If
you have pairs of things, you have to divide the traffic, which brings
me back to R-R DNS. Otherwise, you have a set of hardware that never
gets used.


andrew already explained how this works with a pair of lbs.



I'm not sure how your better layout is any different than mine, except
that you've replaced Apache-httpd-based-load-balancing with what looks
like appliance-based-load-balancing and put firewalls out front (which
is logically insignificant).


much more availability? Ideally, in a stateless or session-lbed
application the user will never be affected if a machine dies :-)

And yes the firewalls are insignificant. But nowerdays, with all that
bot-nets and stuff, you really want them to handle the dos :-)



- -chris



regards
Leon

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Multiple Instances on one Machine

[Rahul]

I am using Tomcat 5.5 to run multiple instances of Tomcat (JVM) on one machine 
(localhost) using Eclipse. I have two webapps a and b with their respective 
web.xml files in $CATALINA_HOME\webapps\WEB-INF. I have two server.xml files 
(server-a.xml and server-b.xml), one for each webapp with different server and 
connector ports. 

The $CATALINA_BASE/conf/Catalina/localhost directory contains a.xml and b.xml 
files with Context path=/a docBase=a debug=0 reloadable=true/ and 
Context path=/b docBase=b debug=0 reloadable=true/ entries 
respectively. 

Issue: When I start one webapp b using Eclipse (program argument = -config 
${CATALINA_BASE}\conf\server-b.xml start), the webapp a is started first and 
then webapp b is started. Vice versa is not true. I am unable to find a 
reason *why* this webapp a is getting started. 

While trying to debug that I am wondering if my way of using two server.xml 
files for this scenario correct or is there any other way?
(A similar solution is mentioned at 
http://tomcat.apache.org/tomcat-3.3-doc/tomcat-apache-howto.html although it's 
a bit legacy version.)

Thanks,
Rahul.


 

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Re: Is APR worth it (for me?)

[Rainer Jung]

Peter Kennard wrote:
Doesn't AJP multiplex traffic, that is queued up requests are 
serialized through one connection that remains connected and it 
switches between servlets on the receiving end? and recycles the 
execution thread?


No multiplexing on connections.

Regards,

Rainer



At 19:19 3/7/2007, you wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Rémy,

Rémy Maucherat wrote:
 The scalability improvement is twofold for AJP:
 - when running many Apache frontend servers (each with a sizeable
 number of workers), Tomcat would need a huge amount of AJP worker
 threads with the java.io connector

Makes sense. So, instead of a Java thread waiting in every single ajp
connection, you're using one native listener thread waiting on a
select(), right? It's sad that you can't do this in Java :(

 - threads will only be used for actually executing requests, thus
 making concurrency in business logic a bit more predictable (if you
 have 2000 threads, it's ok most of the time, as long as no lock gets
 contested by too many threads, in which case it's far better if you
 had only 200 threads)

Definitely. Unless I'm mistaken, Java threads on Linux are pthreads,
which are relatively heavy. Reducing them is certainly going to reduce
memory, thread counts (wrt system limits), and thread dump lengths.

 It also saves memory (no surprise). Socket polling will only be used
 for keepalive: during the processing of a request, the connector uses
 regular blocking IO.

Cool. So, it /does/ sound like something worth looking into. APR
installation looks like a snap, too, so it shouldn't be painful at all.

Thanks for the explanation, Rémy.

- -chris


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Re: Is APR worth it (for me?)

[Bill Barker]

Christopher Schultz [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Chuck,

 Caldarale, Charles R wrote:
 From: Christopher Schultz [mailto:[EMAIL PROTECTED]
 Subject: Is APR worth it (for me?)

 However, the APR description page suggests that scalability
 is improved through the use of socket-polling

 The scalability is improved due to not having to keep a thread around
 for each persistent HTTP connection.

 I see.

 The new NIO connector in Tomcat 6 also achieves this.

 ...without regard to the presence of APR, I would imagine.


There is a fairly old NIO/AJP Connector that ships with TC 5.5  6, but it 
sort of died due to lack of anybody caring it was there.

 Do you have a simulated production environment where you can just try
 the two connectors back-to-back?

 I do, but I don't have a load test scenario right now that I can use to
 get some good numbers. We currently serve very light load on a one-box
 wonder, so I would imagine that any performance improvement would not be
 observable in production today.

 - -chris
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