Re: Tomcat 3.3, server.xml and a lot of fun
A collection of java designer's newsgroup posts can be found here:
http://groups.google.com/groups?[EMAIL PROTECTED]hl=enlr=safe=off;
btnG=Google+Searchsite=groups
Looks like s/he can be nice to people when in good mood. Surprisingly, none
of his posts is Java related.
--V.
- Original Message -
From: java programmer [EMAIL PROTECTED]
To: Jan Labanowski [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Monday, December 03, 2001 10:56 PM
Subject: Re: Tomcat 3.3, server.xml and a lot of fun
--- Jan Labanowski [EMAIL PROTECTED] wrote:
You must be working for Microsoft, I assume...
BTW... servlet.xml cannot have DTD, since people can
add their own stuff
(classes), instantiate it in server.xml, and name it
the way they want,
and DTD would not allow it...
Jan
Please don't top post. Replies go under the
original post. Only MS weenies with MS outlook
top post.
Ok. I am going to rant here.
rant
Tomcat 3.3.x's internals really suck. I have looked
at probably all of the JDK source over the past
5 years and tomcat is at the very bottom in terms
of quality, readability, even trivialities like
source code formatting/comments.
JSP/Servlets are *important*. They are probably the
most important java api, now that java has proven
to be a total failure on the client side. (java, in
general, is *great* though).
Now, it wouldn't be so bad that tomcat is a internal
mess, if the exposed API/interface was pleasant.
By this I mean, installing, configuring, extending,
and documentation. Tomcat falls down in all areas.
I mean, I really am very frustrated. There should be
no reason to be.
Let's take a simple, yet real world example of 2
virtual hosts, each served by Tomcat.
Well, do I use:
a) 1 tomcat instance with 1 server.xml file with
different AutoWebApps ? (have you seen how
terse the autowebapp doc is ? They don't even
say if the host name param should be a FQDN) ?
b) 2 separate instances of tomcat with 2 separate
server.xml files ?
c) Some other random, trial by fire combo ?
I mean, in places, the docs say that version 3.3
and earler require separate instances of Tomcat.
Other places, they say things like: You can add
apps to multiple virtual hosts. (implying 1
tomcat server ?).
I don't know. The JSPException that I described in
the original post, is not really documented
anywhere. Tomcat should have printed a meaningful
message when that happened. Just barfing up the
Exception itself, doesn't help me, i.e., the end
user at all.
There isn't any real documentation, and whatever
there is, is mutually incompatible in many places.
Is this the best Sun/Apache can do ?
And on a personal note: I think the whole webapp
idea is silly. It sounds promising of course, but
it complicates things for most people. If I am
running a web site, run with jsp's, then I want:
apache (httpd)
|
|_some doc root
|
|__ all .html, .jsp files, images here.
And only one context (/).
In addition, path or extension based mappings
_are_ useful but should be the _sole_ domain of
the web server. That would be Apache in my case.
That's how ASP works, that's how LiveWire used
to work. I don't want my images, files etc., all
over the place. I want them all under the htdocs
directory. (yeah, I know I can do it, but I want
that to be the default out of box tomcat behavior).
webapps should never have made it
into the spec. Name three well known
web sites running in a mass virtual hosted
environment and deployed as webapps with
a web.xml file to boot ! Hell, name *any*.
And the kicker is the gratuitous, idiotic
use of XML for _configuration_. For you to say:
servlet.xml cannot have DTD, since people can
add their own stuff
(classes), instantiate it in server.xml, and name it
the way they want,
shows that you have no conceptual idea what xml is
intended for.
Java:
class foo {
//variables (structure)
}
C:
struct {
//variables (structure)
}
Database:
create table [ .. columns/structure ..]
BNF:
syntax ::= { rule }
rule ::= identifier ::= expression
expression ::= term { | term }
term ::= factor { factor }
[..]
XML is similar to the above 4. XML is a way to
*define*/*create* new and arbitrary data
formats (although somewhat limited compared
to BNF type grammars). This way, I know and
you know what we are saying when we exhange data.
If there is _no_ format (dtd), there _is_ no
structure. That's a shoddy development time
hack only. Tomcat has been deployed for years
now. There is no excuse not to have a server.dtd.
Here's a factoid for the sun team: If I
had the money, I would buy ServletExec or maybe
JRun. I have been hacking java since '94 and
I am frustrated with how inelegant 3.3 feels.
The Sun/Apache team can learn a great
deal either of those 2 distros. (I am not talking
about fancy installers or GUI's but about
documentation and error handling
Re: Tomcat 3.3, server.xml and a lot of fun
Unfortunately, you missed the point... - Original Message - From: java programmer [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, December 03, 2001 10:35 PM Subject: Re: Tomcat 3.3, server.xml and a lot of fun Vladimir Grishchenko [EMAIL PROTECTED], looked up from a pending proctological exam, butthole opening, and contracting and gushing rectal mucous and opined: I used almost every version of TC since 3.x to 4.0. [..a buncha crap flushed..] Jeez. It must be part of the human condition that there really is no escape from stupidity. Here I was, looking for a cogent response, and I get a blazing cretin, with _no_ suggestion to offer save for proclaming a wholesome and beautiful experience with Tomcat. My, my all the way back to version 3.0 you say ? The irony of your _top_ _post_,(produced more than likely with gatesian trash I wouldn't rely on to so much as prop the outhouse door), with all_ of the original post intact, is as they say, quite delicious. Best regards, [EMAIL PROTECTED] __ Do You Yahoo!? Buy the perfect holiday gifts at Yahoo! Shopping. http://shopping.yahoo.com -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: an alternative approach to the standard mvc
What's wrong with Element Construction Set (http://jakarta.apache.org/ecs/index.html) ? IMHO the whole point of MVC is to separate presentation logic from business logic. Your solution seems to only abstract html construction via java object manipulation. There's much more to MVC than just that. It's no replacement for MVC. Overall the idea is nice but not new. Sorry for not being supportive, just my opinion. --V. - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, December 03, 2001 3:48 PM Subject: an alternative approach to the standard mvc Hi everyone, For those who have built a web application using the standard MVC pattern I'm sure you have found it can be quite a tedious and cumbersome solution. The constant need to jump in and out of html/java and the messy process of moving data between the model, the controller and the view is not a pretty one. I've tried to come up with a better solution for implementing MVC. Objective html is a toolkit that aims at making html form development similar to the code you write for something like Java-Swing. Instead of having 3 components for each form, i.e. the jsp page, the javabean and the controller, I've pull all these components back together so you have the model, controller and view in the one class file. If you check out my example its a much more intuitive and easy to follow solution then having the standard 3 parts solution. Some advantages of Objective HTML are: - Form data is much easily handled and much more intuitive - No need to have 3 pieces of code like MVC (jsp, bean, controller), instead most of your code lies in one class - Less knowledge of html required, most of the messy html code is abstracted in the Java objects - Much more Object-Orientated for the discipline freaks - Fully open source I hope some people can try out this toolkitout and let me know if it is useful to them and what I can do to improve it. Check out the website at http://objectivehtml.sourceforge.net Cheers, Keith -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: an alternative approach to the standard mvc
Well, after taking second look I agree that ECS is more primitive. Don't get me wrong, I'm just trying to say that making HTML construction done via Java objects and providing convenience methods for extracting request parameters is no replacement for MVC in a general case. Say, I want to change the look and feel of my web site (an old example...), do I need to rewrite all my classes that inherit from OHTML and have them recompiled? If it's a simple project it's probably OK, but as a Java software developer I don't want to create html designs (whether or not via html directly or using OHTML classes) if there are people on the project who are good at it, and in their turn those people won't feel comfortable dealing with Java code. Again, don't get me wrong, the stuff you've created is great, but unfortunately it's not a universal MVC replacement. Just my 2 c. Vlad. - Original Message - From: [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, December 03, 2001 4:46 PM Subject: Re: an alternative approach to the standard mvc Well that particular project you referred its just a generic construction set for Html or Xml. The toolkit I've proposed goes beyond that, my objects actually have state and are true objects in the OO sense. The toolkit does more than just abstract html construction via java manipulation, if thats what you think it does then you've missed the whole point. I welcome your comment though, cause it means I haven't explained the purposes toolkit well enough. I know what MVC is meant to do, in theory it sounds very good but one of the problems is that a lot of the times business logic drives the presentation. What I'm trying to do is make the view/model/controller a lot closer to each other, i.e. I'm trying to couple the parts that they have in common and trying to decouple the parts that should be seperated. In the normal MVC pattern you got the model, view and controller all seperated, but the reality is that there is strong relationship between all of them. Before you make another comment, please have a look at what the method updateData() tries to do and look at how you much easier you access the data from the form and how you can manipulate the presentation of the form. btw.. my solution does seperate presentation from the logic. All the presentation is held in the objects themselves. Though I haven't planned it, its possible that these objects at a latter stage will render something else instead of Html. Vladimir Grishchenko [EMAIL PROTECTED] on 04/12/2001 11:29:39 Please respond to Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] cc: Subject: Re: an alternative approach to the standard mvc What's wrong with Element Construction Set (http://jakarta.apache.org/ecs/index.html) ? IMHO the whole point of MVC is to separate presentation logic from business logic. Your solution seems to only abstract html construction via java object manipulation. There's much more to MVC than just that. It's no replacement for MVC. Overall the idea is nice but not new. Sorry for not being supportive, just my opinion. --V. - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, December 03, 2001 3:48 PM Subject: an alternative approach to the standard mvc Hi everyone, For those who have built a web application using the standard MVC pattern I'm sure you have found it can be quite a tedious and cumbersome solution. The constant need to jump in and out of html/java and the messy process of moving data between the model, the controller and the view is not a pretty one. I've tried to come up with a better solution for implementing MVC. Objective html is a toolkit that aims at making html form development similar to the code you write for something like Java-Swing. Instead of having 3 components for each form, i.e. the jsp page, the javabean and the controller, I've pull all these components back together so you have the model, controller and view in the one class file. If you check out my example its a much more intuitive and easy to follow solution then having the standard 3 parts solution. Some advantages of Objective HTML are: - Form data is much easily handled and much more intuitive - No need to have 3 pieces of code like MVC (jsp, bean, controller), instead most of your code lies in one class - Less knowledge of html required, most of the messy html code is abstracted in the Java objects - Much more Object-Orientated for the discipline freaks - Fully open source I hope some people can try out this toolkitout and let me know if it is useful to them and what I can do to improve it. Check out the website at http://objectivehtml.sourceforge.net Cheers, Keith -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles
Re: Tomcat 3.3, server.xml and a lot of fun
I'm not usually practicing help to rude people but I'll make an exception
and will give you a hint.
I used almost every version of TC since 3.x to 4.0. Yes, I had problems
starting it and moments of frustration, but all issues turned out to be my
fault mostly due to my incompetence at that time. I think you're no
exception. I'll also give you a free advice. If you want to get help here
then change your attitude, otherwise your voice will be lost in the noise.
Sincerely,
--V.
- Original Message -
From: java programmer [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, December 03, 2001 6:06 PM
Subject: Tomcat 3.3, server.xml and a lot of fun
Hi all:
Tomcat 3.3 (on linux) seems to be quite shoddily
developed. Surprising that, given it's high
visibility and posture.
Consider for instance:
I downloaded the binary distro of tomcat 3.3.
I have set and exported both TOMCAT_HOME and
JAVA_HOME. Compiled and installed mod_jk.so
too. (against Apache 1.3.22).
All I have to do is edit/configure the
conf/server.xml file and I should be well
on my way right ?
Well let' see.
shell vi server.xml
shell tomcat.sh start -jkconf
EmbededTomcat: exception initializing ContextManager
java.lang.NullPointerException at
org.apache.tomcat.facade.JspInterceptor.addContext(Unknown
Source)
[..bunch of stack trace crap here ..]
Hmm. The message above gives me *no* more information.
Nothing looks obviously wrong with the server.xml
file, let's validate it using the W3C validator.
But wait, there is *NO* server.dtd. There is only a
description in the manual which says:
--- quote --
This is the main element in server.xml. It has a
single child describing the tomcat configuration,
ContextManager.
Examples
Server
ContextManager
... ( tomcat configuration )
/ContextManager
/server
ContextManager
- end quote --
Hmm. Well my file kinda looks ok, but not having a
DTD kinda means that the tomcat developers don't
understand the central concept behind xml. But's
let's leave that aside for now. Let's just validate
the *syntax* of server.xml using W3C (if the
structure indeed is as simple as the manual claims).
[fire up a browser, validate server.xml here]
Well, that validated fine. So why am I getting
the error and wh am I getting it? There is no
way to tell, either from the Exception, or
the LACK OF DOCUMENTATION.
2 hours later, after random permutations and
combinations of server.xml I still haven't found
what's wrong.
Attached below is the complete server.xml,
in case any of you are interested.
In the past, I may have gotten upset at having wasted
all this time. But that was before I found enlightment
through tomcat. Now I am at peace with the world for
tomcat teaches us about the futility of trying to
solve simple problems.
Of course, now that I have given up trying to make
this thing work, I do have some idle time to wonder:
Exactly what are the tomcat developers smoking ?
Best regards,
[EMAIL PROTECTED]
server.xml follows --
Server
ContextManager workDir=work
ContextXmlReader config=conf/apps.xml /
ApacheConfig noRoot=true forwardAll=false
jkDebug=info jkWorker=ajp13 /
AccessInterceptor /
AccessLogInterceptor /
Http10Connector port=8080 secure=false /
Ajp12Connector port=8007 address=127.0.0.1
backlog=250 /
Ajp13Connector port=8009 address=127.0.0.1
backlog=250 /
AutoDeploy source=modules target=modules
redeploy=true /
AutoWebApp dir=modules host=DEFAULT
trusted=true/
AutoDeploy source=webapps target=webapps /
AutoWebApp dir=webapps host=DEFAULT /
DecodeInterceptor /
ErrorHandler showDebugInfo=true /
InvokerInterceptor /
Jdk12Interceptor /
JspInterceptor keepGenerated=true
useJspServlet=false /
LoaderInterceptor11 useApplicationLoader=true /
LoadOnStartupInterceptor /
LogSetter name=tomcatlog timestamps=true
verbosityLevel=INFORMATION
path=logs/tomcat-log /
PolicyLoader
securityManagerClass=java.lang.SecurityManager
policyFile=conf/tomcat.policy /
ReloadInterceptor fullReload=true /
Servlet22Interceptor /
SessionExpirer checkInterval=120 /
SessionId cookiesFirst=true noCookies=false /
SessionIdGenerator
randomClass=java.security.SecureRandom
randomFile=/dev/urandom /
SimpleMapper1 /
SimpleSessionStore maxActiveSessions=-1 /
StaticInterceptor listings=false /
TrustedLoader /
WebXmlReader validate=true /
WorkDirSetup cleanWorkDir=false /
LogSetter name=servlet_log
timestamps=true
verbosityLevel = INFORMATION
path=logs/servlet-${MMdd}.log /
LogSetter name=JASPER_LOG
timestamps=true
path=logs/jasper-${MMdd}.log
verbosityLevel = INFORMATION /
/ContextManager
/Server
- end
__
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Re: This would be cool in tomcat as well...
Tomcat is a _reference_ implementation. I doubt it will be polluted by non-portable extensions, even if they seem to be useful. --V. - Original Message - From: Geir Magnusson Jr. [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Saturday, November 17, 2001 9:43 AM Subject: This would be cool in tomcat as well... http://www.caucho.com/products/resin/ref/velocity.xtp :) geir -- Geir Magnusson Jr. [EMAIL PROTECTED] System and Software Consulting Whoever would overthrow the liberty of a nation must begin by subduing the freeness of speech. - Benjamin Franklin -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: Tomcat Spontaneously Restarting System
TC is pure Java. Java has no methods that can force system shutdown. The way to do it from Java is JNI. Search for native or loadLibrary in deployed web applications to see if someone is doing something funky. Another possible way to do it Is Runtime.exec(), so search for exec also. You should also distinguish between a graceful shutdown and a system crash. --V. - Original Message - From: Jim Cheesman [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 12:12 AM Subject: RE: Tomcat Spontaneously Restarting System At 10:36 PM 19/09/01, you wrote: Thanks Chris, I thought the class was doing something odd, but it has happened to me from time-to-time without warning. I must admit to not having seen stuff like this before, although this is the first time using win2k. I'm pretty sure the problem lies in a conflict with some software on the lab machines. It could be anything... There's a small suite of applications* that have caused much fun around here at work that allow you to remotely execute applications, shutdown machines etc. etc. for Win2K. They work IFF you know an (adminstrator?) password on the target machine, so you might want to try changing that and seeing if the problem goes away... * available from http://www.sysinternals.com - psList, psExec, psKill, psShutdown... fun for all the family. Jim -- * Jim Cheesman * Trabajo: [EMAIL PROTECTED] - (34)(91) 724 9200 x 2360 A kind word turneth away wrath, but not as effectively as superior firepower.
Re: Tomcat 4.0 Session Timeout
Can you use HttpSession.setMaxInactiveInterval(int) method to set it at runtime? --V. - Original Message - From: Jim Urban [EMAIL PROTECTED] To: Tomcat-User [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 9:52 AM Subject: Tomcat 4.0 Session Timeout I've now asked this three times and have yet to receive a solution. I must get this resolved since the security requirements of my application require the user's session to automatically time out after 5 minutes of inactivity... How do I set the session time out for a context in Tomcat 4.0. The session time out is defaulting to 18000 seconds (5 hours?). I have tried adding the following to both my context's WEB-INF/web.xml file and the $CATALINA_HOME/conf/web.xml file but both are ignored. session-config session-timeout300/session-timeout /session-config How do I go about setting the time out to 5 minutes? Thanks, Jim Urban Product Manager Netsteps Inc. Suite 505E 1 Pierce Pl. Itasca, IL 60143 Voice: (630) 250-3045 x2164 Fax: (630) 250-3046 PS: Love Tomcat 4.0, it seems really solid!
Re: Tomcat 4.0 Session Timeout
It's not a TC feature, it's in servlet spec, and it was there at least since 2.1. --V. - Original Message - From: Jim Urban [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 10:34 AM Subject: RE: Tomcat 4.0 Session Timeout I can, but this defeats the purpose of configuring Tomcat to set it for me. Was this feature removed or just moved in 4.0? Jim -Original Message- From: Vladimir Grishchenko [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 20, 2001 12:27 PM To: [EMAIL PROTECTED] Subject: Re: Tomcat 4.0 Session Timeout Can you use HttpSession.setMaxInactiveInterval(int) method to set it at runtime? --V. - Original Message - From: Jim Urban [EMAIL PROTECTED] To: Tomcat-User [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 9:52 AM Subject: Tomcat 4.0 Session Timeout I've now asked this three times and have yet to receive a solution. I must get this resolved since the security requirements of my application require the user's session to automatically time out after 5 minutes of inactivity... How do I set the session time out for a context in Tomcat 4.0. The session time out is defaulting to 18000 seconds (5 hours?). I have tried adding the following to both my context's WEB-INF/web.xml file and the $CATALINA_HOME/conf/web.xml file but both are ignored. session-config session-timeout300/session-timeout /session-config How do I go about setting the time out to 5 minutes? Thanks, Jim Urban Product Manager Netsteps Inc. Suite 505E 1 Pierce Pl. Itasca, IL 60143 Voice: (630) 250-3045 x2164 Fax: (630) 250-3046 PS: Love Tomcat 4.0, it seems really solid!
Re: Session expiring(?) on UNIX platform. Help!!!!...
Could it be that your browser is not set to accept cookies if you're using them for session tracking? --V. - Original Message - From: Bala Nemani [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 11:08 AM Subject: Session expiring(?) on UNIX platform. Help... Hello All: We are working on an application which stores successful userid in a session and used for subsequent user requests. On NT platform the app runs fine. However on UNIX platform, the values stored in session are not found (or the session not found?). Every time a request comes from user it appears to be looking for a new session. Checked application code and it works perfectly fine on NT. Seems something to do with Tomcat on UNIX platform. Appreciate if anyone can help... Thanks in Advance Bala Nemani
Re: Object Sharing
ServletContext.setAttribute() ServletContext.getAttribute() right? --V. - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 10:52 AM Subject: Object Sharing Hi I want to have single instance of x class to be referenced in all the Servlets requests and applied singleton pattern. Right now one instance for servlet is created. How can use single instance of X class in all the servlets. Thanks Rajesh
Re: Object Sharing
Nope. It's sometimes usefult to read api documentation: quote There is one context per web application per Java Virtual Machine. (A web application is a collection of servlets and content installed under a specific subset of the server's URL namespace such as /catalog and possibly installed via a .war file.) /quote regards, --V. - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 12:33 PM Subject: RE: Object Sharing If I set to context it will confined to single servlet right... -Original Message- From: Vladimir Grishchenko [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 20, 2001 12:13 PM To: [EMAIL PROTECTED] Subject: Re: Object Sharing ServletContext.setAttribute() ServletContext.getAttribute() right? --V. - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 10:52 AM Subject: Object Sharing Hi I want to have single instance of x class to be referenced in all the Servlets requests and applied singleton pattern. Right now one instance for servlet is created. How can use single instance of X class in all the servlets. Thanks Rajesh
Re: Jars in WEB-INF/lib and RMI stubs in WEB-INF/classes not found
Sounds like a beaten to death topic. Search TC archives for class loading. --V. PS: sorry for not being too helpful, but this question has been answered way too many times. - Original Message - From: Joshua van Tonder [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 2:47 PM Subject: Jars in WEB-INF/lib and RMI stubs in WEB-INF/classes not found How does classloading work in tomcat 3.2.2? In deploying my application I am having problems getting classes loaded aren't on the system classpath. I changed the tomcat.bat so that the generated classpath doesn't doesn't include the system classpath and only includes things built by the batch file. I have placed log4j.jar and crimson.jar into WEB-INF/lib for my app. For other reasons crimson.jar needs to be 1st on the classpath (specifically b4 parser.jar) and I so try adding it by doing like so in batch file: set CP=%TOMCAT_HOME%\webapps\MYAPP\WEB-INF\lib\crimson.jar;%CP% But it isn't found. If I instead do: CP=%TOMCAT_HOME%\lib\crimson.jar it also isn't found. Only if I place it outside of %TOMCAT_HOME% and reference it are classes found. The wierd thing is that I can place log4j.jar in the %TOMCAT_HOME% and have things work (but also can't find classes from it if it's added to classpath referenced from WEB-INF/lib). This also extends to rmi stubs in the WEB-INF/classes directory. Other classes from our app in this dir our found except for the stubs. any ideas, I'm stu[bb|mp]ed...
Re: Jars in WEB-INF/lib and RMI stubs in WEB-INF/classes not found
Sounds like a beaten to death topic. Search TC archives for class loading. --V. PS: sorry for not being too helpful, but this question has been answered way too many times. - Original Message - From: Joshua van Tonder [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 2:47 PM Subject: Jars in WEB-INF/lib and RMI stubs in WEB-INF/classes not found How does classloading work in tomcat 3.2.2? In deploying my application I am having problems getting classes loaded aren't on the system classpath. I changed the tomcat.bat so that the generated classpath doesn't doesn't include the system classpath and only includes things built by the batch file. I have placed log4j.jar and crimson.jar into WEB-INF/lib for my app. For other reasons crimson.jar needs to be 1st on the classpath (specifically b4 parser.jar) and I so try adding it by doing like so in batch file: set CP=%TOMCAT_HOME%\webapps\MYAPP\WEB-INF\lib\crimson.jar;%CP% But it isn't found. If I instead do: CP=%TOMCAT_HOME%\lib\crimson.jar it also isn't found. Only if I place it outside of %TOMCAT_HOME% and reference it are classes found. The wierd thing is that I can place log4j.jar in the %TOMCAT_HOME% and have things work (but also can't find classes from it if it's added to classpath referenced from WEB-INF/lib). This also extends to rmi stubs in the WEB-INF/classes directory. Other classes from our app in this dir our found except for the stubs. any ideas, I'm stu[bb|mp]ed...
Re: JDBC Connection Pool Theory ??
Professional Java server programming from WROX had a chapter about it, as far as I remember. I can't call it a comprehensive study, but it had some meaningful explanations. What's wrong with poolman btw? IMHO it is as simple as it gets, your application doesn't even know it deals with pooled connections. Portable? As portable as Java itself. My philosophy on such things is take it if it's available and concentrate on your application domain issues and not the plumbing (plumbing in good sense here...). --V. - Original Message - From: Jon Shoberg [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, September 20, 2001 7:37 PM Subject: JDBC Connection Pool Theory ?? Can anyone suggest or point to readings on JDBC connection pool theory? Something that covers how a pool is implemented, best case / worst case scenarios, tips and traps. My next web application is looking to be very database (mysql) intensive. I would like a pooling mechanism that is VERY simple to use, VERY light, low overhead, and portable. Having looked at packages such as poolman, I decided I need to learn a bit more about JDBC and pooling in general. Any thoughts ? Jon
off topic
Just wondering if someone on this list is familiar with WebSphere 4.0. I'm looking for any info on how to add extended status code messages to it. In TC I simply edited a properties file to associate status codes with messages and everything was fine. WebSphere throws a NullPointer whenever I try to use a non standard status code and nothing works. I looked everywhere, no result. Looks like it's hard-coded... Anyway, sorry for off-topic. --V.
Re: interesting fault on toshiba laptop
Sounds weird. I don't think that hw is the problem, because if it was then you'd get some sort of error in native code, but Tomcat not recognizing sessions Most likely the problem lies in different network configuration, like IP address, any http proxies you're using, etc. --V. - Original Message - From: Jason Eacott [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, August 29, 2001 11:59 PM Subject: interesting fault on toshiba laptop Hi, I have been trying to run Tomcat 3.x on a toshiba Satelite Pro 4300 series running both NT4sp6 and W2000 Advanced Server. Tomcat 3.x behaves very strangely in both OS, the main symptom being that it fails to recognise sessions properly. Tomcat4 does not have this problem. I am thinking that this problem is due to hardware rather than software since it occurs ONLY on this machine and in both OS' that I've tried it on. Just thought Id share :) Jason. -- Jason Eacott Hardlight Interactive http://www.hardlight.com.au Support bacteria - they're the only culture some people have.
Re: Memory used by java process
As long as the growing process stops at some point it's fine. Java is dynamic by nature, meaning the classes are loaded on demand, not proactively. Jsp pages are compiled into servlets and get loaded only as needed, that's why process size is growing with time. Try -verbose options to see how many classes get loaded per request. You're also generating objects yourself in servlets/Jsp's. Some of them are long lived, which contributes to growing heap/process size. Another thing is that VM doesn't give all memory back even after it's reclaimed by GC. If it keeps growing without bounds most likely you have a memory leak somewhere, meaning some objects cannot be reclaimed by GC because they are strongly reachable. Also, the -Xincgc option you use enables train or incremental garbage collection, which from my experience makes GC less aggressive in general (this is what it's meant for anyway), which translates into larger Java process/heap size but less noticeable GC pauses. Hope this helps, --V. - Original Message - From: Roy K. Mayr R. [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, August 25, 2001 6:25 PM Subject: Memory used by java process Hi, I'm working with Solaris 8, Tomcat 3.3b, jdk 1.3.1, and Apache... When I start tomcat, java process use 16M and when I run JSP pages this process grow more, more, more I start java with options: export TOMCAT_OPTS= -server -verbosegc -Xincgc -Xmx150m What is wrong?? Output of verbosegc is: [GC 2048K-315K(2368K), 0.0462030 secs] [GC 2363K-700K(2816K), 0.0608491 secs] [GC 2748K-892K(3072K), 0.0341915 secs] [Full GC 2532K-1166K(2944K), 0.1949014 secs] [Full GC 1182K-1166K(2944K), 0.1618361 secs] [Full GC 1182K-1166K(2944K), 0.1584852 secs] [Full GC 1182K-1165K(2944K), 0.1936703 secs] [Full GC 1181K-1165K(2944K), 0.1533219 secs] [Full GC 1181K-1165K(2944K), 0.1563846 secs] [Full GC 1181K-1166K(2944K), 0.1545294 secs] [Full GC 1182K-1165K(2944K), 0.1559197 secs] [Full GC 1181K-1165K(2944K), 0.1528804 secs] [Full GC 1181K-1166K(2944K), 0.1569995 secs] [Full GC 1182K-1165K(2944K), 0.1563494 secs] [Full GC 1181K-1165K(2944K), 0.1603762 secs] [Full GC 1181K-1165K(2944K), 0.1538769 secs] [Full GC 1181K-1165K(2944K), 0.1532354 secs] [Full GC 1181K-1165K(2944K), 0.1560933 secs] [Full GC 1181K-1165K(2944K), 0.1897674 secs] [Full GC 1181K-1165K(2944K), 0.1539893 secs] [Full GC 1181K-1165K(2944K), 0.1579279 secs] [Full GC 1181K-1165K(2944K), 0.1608534 secs] [Full GC 1181K-1165K(2944K), 0.1537858 secs] [Full GC 1181K-1165K(2944K), 0.1563487 secs] [Full GC 1181K-1165K(2944K), 0.1607285 secs] [Full GC 1181K-1165K(2944K), 0.1566505 secs] [Full GC 1181K-1165K(2944K), 0.1559282 secs] [Full GC 1181K-1165K(2944K), 0.1530489 secs] [Full GC 1181K-1165K(2944K), 0.1607813 secs] [Full GC 1181K-1165K(2944K), 0.1538563 secs] ... And finaly, every page that I see, output: [GC 6976K-6516K(7232K), 0.0142359 secs] [GC 7021K-6564K(7232K), 0.0164692 secs] [GC 7076K-6643K(7360K), 0.0208976 secs] What it means ?? Roy
Re: How do I make Tomcat include needed jars for my servlet?
Well, I think you have 3 options: 1. Switch to Linux and use symlinks 2. Ask Sun to change servlet spec. 3. Write a script that will copy the files in one shot. Cheers, --V. - Original Message - From: Ju Yan Jery Qin [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, August 24, 2001 1:58 AM Subject: Re: How do I make Tomcat include needed jars for my servlet? First thank Vladimir Grishchenko and Rob S. for your help But in my case, since our product has its own framework and we just do some customization. So the directory structure is fixed, it looks like this d:\vendor\webapp1\codebase\ under this directory there are classes used by webapp1 d:\vendor\webapp1\codebase\ under this directory there are classes used by webapp2 The two webapps has many other directories and also they have many similar classes with the same package name. In our case, server.xml has these entries: Context path=/webapp1 docBase=d:\vendor\webapp1\codebase debug=0 reloadable=true /Context Context path=/webapp2 docBase=d:\vendor\webapp2\codebase debug=0 reloadable=true /Context Our developer is used to generate classes in d:\vendor\webapp1\codebase\ and d:\vendor\webapp1\codebase\ If I can redirect d:\vendor\webappx\WEB-INF\classes to d:\vendor\webappx\codebase\ just like symbolic link under UNIX, this problem will be resolved. So I wonder if there is a place where we can define CLASSPATH in our webapp instead of put our classes in a fixed place( although it is relavant to our webapp ). I think this is a good feature if implemented.
Re: How do I make Tomcat include needed jars for my servlet?
Yet another one: Place codebase dirs on system classpath, you'll have to restrat tomcat every time there's a change. --V. - Original Message - From: Vladimir Grishchenko [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 24, 2001 7:38 AM Subject: Re: How do I make Tomcat include needed jars for my servlet? Well, I think you have 3 options: 1. Switch to Linux and use symlinks 2. Ask Sun to change servlet spec. 3. Write a script that will copy the files in one shot. Cheers, --V. - Original Message - From: Ju Yan Jery Qin [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, August 24, 2001 1:58 AM Subject: Re: How do I make Tomcat include needed jars for my servlet? First thank Vladimir Grishchenko and Rob S. for your help But in my case, since our product has its own framework and we just do some customization. So the directory structure is fixed, it looks like this d:\vendor\webapp1\codebase\ under this directory there are classes used by webapp1 d:\vendor\webapp1\codebase\ under this directory there are classes used by webapp2 The two webapps has many other directories and also they have many similar classes with the same package name. In our case, server.xml has these entries: Context path=/webapp1 docBase=d:\vendor\webapp1\codebase debug=0 reloadable=true /Context Context path=/webapp2 docBase=d:\vendor\webapp2\codebase debug=0 reloadable=true /Context Our developer is used to generate classes in d:\vendor\webapp1\codebase\ and d:\vendor\webapp1\codebase\ If I can redirect d:\vendor\webappx\WEB-INF\classes to d:\vendor\webappx\codebase\ just like symbolic link under UNIX, this problem will be resolved. So I wonder if there is a place where we can define CLASSPATH in our webapp instead of put our classes in a fixed place( although it is relavant to our webapp ). I think this is a good feature if implemented.
Re: How do I make Tomcat include needed jars for my servlet?
My setup is as follows: d:\development\projectX\src - contains all source code d:\development\projectX\WEB-INF\classes - compiled classes get here (use javac -d ...) server.xml has this entry: Context path=/foo docBase=d:\development\projectX debug=0 reloadable=true /Context Any time there's a change TC should detect it and reload your webapp, subject to TC limitations on classes/servlet reloading ... In other words, don't use jars if your classes are changing frequently, use ...\WEB-INF\classes as a target for your compilation. If you really like jar files then some IDE's like JBuilder allow you to set a jar file which will be updated as needed whenever you build your projects. CLASSPATH usually means system classpath, and webapp CLASSPATH is ...\WEB-INF\classes;...\WEB-INF\lib\*.jar, afaik there's no way to change it. --V. - Original Message - From: Ju Yan Jery Qin [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, August 23, 2001 6:33 PM Subject: How do I make Tomcat include needed jars for my servlet? Hi all, I have read this topics but it still can not resolve my problem. Your suggestion is to copy application related jar files into %YourWebAppPath%/WEB-INFO/lib dirctory. But my application is under development, so whenever I regenerated jar files for my web app, I have to copy them to that directory again. If under UNIX, you can use symbolic links, but I use Windows 2000 as my server. So my question is: is there any way to define CLASSPATH variable for my web application independently so that I don't need to copy them again and again. In fact, in my case, I have two web application which are derived from the same base but should be installed independently. So these two web application have many classes with the same package and name. And these classes spreaded in two directory d:\vendor\webapp1 and d:\vendor\webapp2 but not in jar file. So I really need a way to define CLASSPATH in application level instead of copy tons of variable classes into d:\vendor\webapp1\WEB-INFO\classes and d:\vendor\webapp2\WEB-INFO\classes again and again. Any clue is appreciated! Best Regards! Jerry Chin
multiple context paths pointing to the same doc base?
Hi there, May be somebody can give me a quick answer with regards to T3.2.2. I need to have multiple context paths to point to the same doc base, say my server.xml has the following entries: Context path=/somectx docBase=d:/foo/bar debug=0 reloadable=false /Context Context path=/somectx1 docBase=d:/foo/bar debug=0 reloadable=false /Context Will the above config cause my webapp classes/servlets to be loaded twice through different classloaders, or TC is smart enough to realize it's the same webapp? Thanks, --V.
Re: multiple context paths pointing to the same doc base?
Thanks for the clarification, it makes sense. Is it according to the spec or just a peculiarity of Tomcat? Actually, I need just the opposite, is there any way to do this? Meaning different context paths - one webapp and one class loader... Thanks, --V. - Original Message - From: Craig R. McClanahan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, August 22, 2001 9:41 AM Subject: Re: multiple context paths pointing to the same doc base? On Wed, 22 Aug 2001, Vladimir Grishchenko wrote: Hi there, May be somebody can give me a quick answer with regards to T3.2.2. I need to have multiple context paths to point to the same doc base, say my server.xml has the following entries: Context path=/somectx docBase=d:/foo/bar debug=0 reloadable=false /Context Context path=/somectx1 docBase=d:/foo/bar debug=0 reloadable=false /Context Will the above config cause my webapp classes/servlets to be loaded twice through different classloaders, Yes. or TC is smart enough to realize it's the same webapp? It is *not* the same webapp. Every webapp must have a unique context path, and you have just defined two different context paths here. The fact that the document base is the same is just a coincidence. Thanks, --V. Craig
Re: multiple context paths pointing to the same doc base?
Thanks for the clarification, it makes sense. Is it according to the spec or just a peculiarity of Tomcat? Servlet 2.3 PFD2, Section 3.1 (emphasis added by **): A ServletContext is rooted at *a* known path within the web server. For example, a servlet context could be located at http://www.mycorp.com/catalog. All requests that begin with the /catalog request path, known as the context path, are routed to the web application associated with the servlet context. Well, I don't want to be picky but this quote doesn't emphasize that context is the same thing as web application, nor does it say that a web application cannot be shared by multiple contexts , it merely says that all requests are routed to the app associated with a particular context. In my understanding (which might be wrong btw) a webapp is something you package and distribute in a *.war file meaning classes, servlets, jsps, static html, and a webapp can be shared by different contexts. Isn't it more correct to have a class loader per *.war file (logically) than per contextpath? Or have it configurable since the spec is somewhat vague on this point? Actually, I need just the opposite, is there any way to do this? Meaning different context paths - one webapp and one class loader... Not that I know of. Of course, that begs the question of *why* you need this -- if everything is identical (as it would be if you got your wish), then what's the point? Without going into much details my particular application is relying on combination of context path and path info values to perform an internal lookup of some data. The data is cached and there's a cache maintanence thread running. So, I end up with as many caches and threads as many contexts I have configured. Of course I can try to interpret request URI's to extract the data I need, but using context path is much easier. Well, I guess I have no choice now :-| --V. Thanks, --V. Craig - Original Message - From: Craig R. McClanahan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, August 22, 2001 9:41 AM Subject: Re: multiple context paths pointing to the same doc base? On Wed, 22 Aug 2001, Vladimir Grishchenko wrote: Hi there, May be somebody can give me a quick answer with regards to T3.2.2. I need to have multiple context paths to point to the same doc base, say my server.xml has the following entries: Context path=/somectx docBase=d:/foo/bar debug=0 reloadable=false /Context Context path=/somectx1 docBase=d:/foo/bar debug=0 reloadable=false /Context Will the above config cause my webapp classes/servlets to be loaded twice through different classloaders, Yes. or TC is smart enough to realize it's the same webapp? It is *not* the same webapp. Every webapp must have a unique context path, and you have just defined two different context paths here. The fact that the document base is the same is just a coincidence. Thanks, --V. Craig
Re: multiple context paths pointing to the same doc base?
One option you have is to put the classes that actually cache things into a common directory ($TOMCAT_HOME/lib or $CATALINA_HOME/lib). Such classes are shared across web apps, so this should accomplish your goal of having a single cache. They are loaded from a (common) parent class loader to the one for each web app. I'm not using the latest servlet spec (2.3). Anyway, the simplest solutuion will be to put all my classes on the system classpath, this should work. I have no jsp's and don't need dynamic class reloading in production, so I beleive it's perfectly legal in my case. Thanks and regards, --V.
Re: ClassLoader Reloading issues
somewhat related issue I've found with T3.2.2. After class reloading the old class isn't GC'ed, is a reference to previous class that's kept around somewhere? Actually I noticed it because I had a cleanup thread running infinitely, and after the class reload I ended up having two threads running. Could also be that runtime keeps a reference to a running Thread (which is the inner class) preventing a class (outer class) from being GC'ed? Sounds like a good explanation... --V. - Original Message - From: Craig R. McClanahan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, August 19, 2001 8:25 PM Subject: Re: ClassLoader Reloading issues On Mon, 20 Aug 2001, Andrés Aguiar wrote: I have a JAR file in my web-inf\lib directory that has an object pool. The pool is kept as a singleton, so, I have a static member with it. And because the class itself is loaded by the webapp class loader, the static is in fact global *only* within this particular web app. The problem is that when a class in web-inf\classes is reloaded, it seems to use a new classloader, That's correct -- there is no way to unload a class in Java except for throwing away the class loader that loaded it (and therefore all of the classes loaded by that old class loader). so the static member is gets not the same as it was, and I end having multiple object pool instances. If I put the .JAR in the Tomcat classpath, it obviously works ok. The problem is that I must keep running in the same servlet-engine instance several applications each of which could a have a different version of my .JAR file, so I can't put it in the classpath. The same happens running the app in Resin. Now, in the servlet spec says: 'Although a Container Provider implementation of a class reloading scheme for ease of development is not required, any such implementation must ensure that all servlets, and classes that they may use, are loaded in the scope of a single class loader. This requirement is needed to guarantee that the application will behave as expected by the Developer. As a development aid, containers are encouraged to maintain the full semantics of notification to session binding listeners if they determine to terminate sessions in order to reload classes. Previous generations of containers created new class loaders to load a servlet, distinct from class loaders used to load other servlets or classes used in the servlet context. This could cause object references within a servlet context to point at unexpected classes or objects, and cause unexpected behavior.' Very early containers used a different class loader for every servlet, not for every web app. To ensure consistent behavior, this is no longer allowed. I'm not sure if this paragraph is referring to the case I'm describing, but if not, it seems pretty close... Any ideas? Is this the way it's supposed to work? Yes, it is working the way it is supposed to work (given the limitations on what Java allows for class reloading). What you need to do is make sure that your class is aware of when the application is being shut down and started up again, so that you can save away the contents of the object pool (at shutdown time) and restore them (at startup time). At shutdown time, you'll need to save the state of the object pool in some fashion that can be used to reconstruct it upon the subsequent startup. A common technique is to serialize the pooled objects to a sequential file (Tomcat 4 does this with all of the currently active sessions when you shut it down or do an application reload). To make sure your object pool class is notified, you've got a couple of choices: * [Servlet 2.3 only] You can use the new application event listener APIs and make sure your class is notified on the application startup and application shutdown events. This will work in Tomcat 4 and other containers that implement the new servlet spec. * You might have a servlet defined as load-on-startup that initializes the object pool in its init() method and saves it away in its destroy() method. This depends on the servlet container *not* removing this servlet from service at any time *other* than application shutdown -- while commonly implemented that way, this is not guaranteed by the servlet spec (it would work in all versions of Tomcat, though). Thanks. Craig McClanahan
Re: ClassLoader
I don't fully understand your setup from the messages you sent but if you
have a custom class loader then you should register webapp class loader to
be the parent of your custom class loader. So, if your custom class loader
lives in webapp directory its constructor should look like:
public class CustomClassLoader
{
public CustomClassLoader()
{
super(this.getClass().getClassLoader() //1
}
}
and then load your classes like
CustomClassLoader ccl = new CustomClassLoader();
Class clazz = Class.forName(xyz.zyx.Foo, true, ccl);
if you skip lilne 1 or have just call to super() then there's simply no way
you can load classes from webapp directory through this classloader, unless
it's implemented that way (btw it's a bad idea) , because system class
loader is set as the parent of ccl, and sys class loader has no clue of how
to load classes from webapp directory.
So, if you write your class loader the above way ccl will first try to
delegate class loading up the class loader tree, which will fail, so it'll
try to load the class itself. As the result of loading class xyz.zyx.Foo any
intefaces loading it implements will be unitiated through ccl, which will be
delegated to webapp class loader, so there should be no problem finding them
in jar files located in webapp directory. There's also a possibility you can
get nasty ClassCast exceptions because of the fact JVM considers a class to
be a combination of class and its class loader, so the same byte array
represineting a class loaded through different class loaders is not the same
class to the JVM.
--V.
- Original Message -
From: jochen mader [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, August 13, 2001 6:16 AM
Subject: Re: ClassLoader
Moving things from Tomcat's internal classes (any version) into your
/WEB-INF/lib is *not* going to work.
What are you trying to accomplish that the standard class loading model
does not support? Just saying I want to use a classloader inside my
servlet does not help much in getting useful suggestions.
Thanks in advance
Jochen
Craig McClanahan
I'm trying to allow my servlet to download classes from another server via
RMI and to use those classes. The problem now is that when I downloaded
the
classes and I try to define the class via the ClassLoader the ClassLoader
tells me that it can't find the required interface classes (which are
stored
in the jars inside the WEB-INF/lib directory). By looking through your
archive I found the following post:
http://w6.metronet.com/~wjm/tomcat/2001/Feb/msg00096.html
*snip*
Am I just screwed or is there some cool trick that I am missing? Of
course
I could change the deployment scheme to put a copy of the dispatcher
servlet into each apps WE-INF/classes, but this seems a bit clunky.
It's not clunky -- its required by virtue of the fact that classloaders
know
how to delegate upwards but not downwards. For lots of security related
reasons, that is actually a Good Thing.
*snip*
Is this post wrong and is there another sollution?
And if not: which of all those classes is the dispatcher servlet?
Thx
Jochen
Re: Restarting Tomcat/Apache
Had the same problem, never figured out how to get rid of it. I used it stand alone. -V. - Original Message - From: Simon Hardingham [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, August 13, 2001 10:27 AM Subject: Restarting Tomcat/Apache Hi, I am having problems restarting Tomcat. It can be a real problem to get Tomcat to shutdown (often requiring a killall java). Even then starting up can be intermittent. Has anyone else had any problems with starting and stopping Tomcat. System details are: RedHat Linux 7.1 on Intel Tomcat 3.2.3 mod_jk (from 3.2.3) Apache 1.3.19 servlets with JDBC to PostgresSQL 7.1.2 Any thoughts? Development is difficult when restarting is such an effort! Many thanks Simon _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ _/ Simon Hardingham - netXtra Ltd - UK _/ _/ Direct Dial: +44 (0) 1787 314890_/ _/ Tel: +44 (0) 1787 319393Fax: +44 (0) 1787 319394 _/ _/ http://www.netxtra.co.uk [EMAIL PROTECTED] _/ _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
RE: Dynamic Class Loading - Reflexion failure
-Original Message-
From: Frank Bourdache
[mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 02, 2001 12:45 AM
To: [EMAIL PROTECTED]
Subject: Dynamic Class Loading - Reflexion failure
Hi,
I am facing problems while loading dynamically classes in my
servlet. For my application's purposes, I have to generate
java code and compile it on the fly, then use it.
Using standard reflexion mecanisms, I try to instanciate a
new testClass object. If it fails, I fork a new process to
generate the class, and retry to instanciate this object again.
If testClass.class is not present when I'm starting Tomcat
4.0b6, there is no way i can instanciate a testClass Object.
(exceptions are raised in both blocks)
ok, see comments below
If I comment out the first block (I always generate the
testClass.class file), then everything works fine, but this
is unacceptable.
If this works the first scenario should work too. Are you sure
you attempt to instantiate a new class after .class file is actually
generated and not prematurely?
After you figure out what is the problem you might consider compling
bytecodes without forking a new process and avoid the unnecessary overhead.
That's how jsp are compiled in tomcat (or JaSPER?).
Also my impression is that Tomcat (at least 3.2) reloads all the classes
in web application regardless of which class has changed, so if you
generate a new .class and try to instantiate it through webapp class
loader it will cause all classes in webapp to reload (correct me if
I'm wrong) = overhead. What you could do instead is to use an instance of
URLClassLoader to load your generated file. Keep in mind that if you
decide to do that you'll have to put your generated class outside of
system classpath.
If you put it on the system classpath no class reloading is possible.
The problem with URLClassLoader approach is that your newly generated
class will not be able to find any of the classes in your webabapp
directory.
No matter what you do it's not gonna be pretty, unless the class
you're trying to reload is pretty much isolated.
--V
I also tried using classLoader, but failed again.
Don't know if it really is Tomcat related. Any clues ?
Thanks for the help !
Regards,
/Frank
public class LoadClassSample extends HttpServlet {
...
try {
Class testObjClass = Class.forName(testClass);
Object testObject = testObjClass.newInstance();
} catch( ClassNotFoundException CNFException ) {
try {
Process _proc =
Runtime.getRuntime().exec(/usr/lib/java/bin/javac
/tmp/testClass.java -d
/usr/local/jakarta-tomcat-4.0-b6/webapps/examples/WEB-INF/classes/);
_proc.waitFor();
Class testObjClass = Class.forName(testClass);
Object testObject = testObjClass.newInstance();
...
} catch( Exception PROCException ) {
...
}
...
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***
RE: viewing application/msword using TOMCAT
if your question is how to launch WORD automatically when opening a doc file from web browser then the answer is to configure mime-types on TOMCAT side, was it web.xml where you do it? don't remember... --V -Original Message- From: jingi [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 02, 2001 4:34 PM To: [EMAIL PROTECTED] Subject: viewing application/msword using TOMCAT how to view application/msword file on browser side using TOMCAT ? thanks for help in advance. -jingi *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: ServletContext.log() - where does it go?
change verbosity level/path in server.xml? --V. -Original Message- From: chris brown [mailto:[EMAIL PROTECTED]] Sent: Friday, July 27, 2001 3:15 AM To: tomcat-user Subject: ServletContext.log() - where does it go? I've tried some simple logging using the following code in some servlets running under Tomcat 3.2.3. getServletContext().log(some message); Normally, I would have expected this to appear in the servlet.log file, but this file remains empty. It's created correctly by Tomcat whenever Tomcat starts, but seems empty. Any ideas as to what I should do to make the messages appear? Thanks, Chris *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
how to check if a url maps to Tomcat space?
I'm trying to find the most effective way to determine (in servlet) if a particular url will be served by the same tomcat instance that the current servlet is running in. I could use java.net.InetAddress and check host names or ip addresses, but it seems to be an overkill plus I'm not sure how to handle port numbers in this case. Thanks for any clues, --V. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: Custom HTTP status code
extract org/apache/tomcat/core/LocalStrings.properties (or org/apache/tomcat/service/LocalStrings.properties ?? don't remember exactly which one did it for me..) from webserver.jar, add/edit status codes you want, put it back and restart Tomcat. You should be running fine now. This should work on 3.2.2, not sure about T4. --V. --- Hi! I'm developing an application not targeted to the web, but still I need to use the HTTP as the protocol. I've chosen to specify five new status code, to report some kind of errors I may generate and that aren't covered by existing ones. These codes are 601, 602, 603, 605, 606. The problem is that using JRun it just ignored the error code, and reported the page normally; tomcat, on the other hand, throws an exception everytime my application reports one such code. This degrades performances very much... Is there a way to specify these new codes as valid? And, in case, to bind a string to them as a description, just as for the other ones? I saw there are some LocalString.properties files, but I can't get them to work; and I think they're just for localization... Many thanks, Germano Rizzo *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: newbie (or a dummy?)
I don't know the exact answer but here are some clues:
1. what jdk are you running on? upgrade to 1.2/1.3 if it's = 1.1
2. check your java.security file, make sure you have the following
entry:
security.provider.1=sun.security.provider.Sun
I guess if you're using non-sun jdk it could be something else.
3. read this
http://java.sun.com/products/jdk/1.2/docs/guide/security/HowToImplAProvider.
html
to understand Java security provider mechanisms
Hope this helps.
--V.
-Original Message-
From: Henderson, Kevin CECOM RDEC STCD
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 25, 2001 8:41 AM
To: '[EMAIL PROTECTED]'
Cc: Lange, Mark A CECOM RDEC STCD
Subject: RE: newbie (or a dummy?)
This is so frustrating. I got JCE, stuck all the jars in jdk/jre/lib/ext,
and no dice. I have been reading thru forums for 2 weeks now, and it seems
that everytime someone had a 'SHA-1 not avail' error, nobody replied. I
don't know where to start. PLEASE HELP me 8(
-Original Message-
From: Vladimir Grishchenko [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 25, 2001 4:21 AM
To: '[EMAIL PROTECTED]'
Subject: RE: newbie (or a dummy?)
Just a wild guess: may be you are missing SHA-1 security provider?
See if you can get it in a separate download from Sun.
--V.
-Original Message-
From: Henderson, Kevin CECOM RDEC STCD
[mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 24, 2001 8:35 AM
To: '[EMAIL PROTECTED]'
Subject: newbie (or a dummy?)
I am trying to run tomcat 3.2.2 and cocoon 1.8.2 on a win2k box.
I followed all instructions to setup tomcat to work with cocoon, and when I
try to run tomcat (w/ tomcat run, cause a new window closes to fast!) , the
output looks normal up until this:
Exception in thread main java.lang.InternalError: internal error: SHA-1
not available
at sun.security.provider.SecureRandom.init(SecureRandom.java:89)
... the error stack goes on for twenty or so lines...
I really would like to get this shtuff working! what have I overlooked?
THANK YOU ;P
{then when I try to put the error trace to a file for the sake of my hand-
(tomcat run err.txt), the output is there up until the errors, then it says
error report can be found inTOMCAT_HOME/logs/tomcat.log ... but its
not there!}
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is prohibited. If you are not the intended recipient, please contact
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RE: newbie (or a dummy?)
Just a wild guess: may be you are missing SHA-1 security provider?
See if you can get it in a separate download from Sun.
--V.
-Original Message-
From: Henderson, Kevin CECOM RDEC STCD
[mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 24, 2001 8:35 AM
To: '[EMAIL PROTECTED]'
Subject: newbie (or a dummy?)
I am trying to run tomcat 3.2.2 and cocoon 1.8.2 on a win2k box.
I followed all instructions to setup tomcat to work with cocoon, and when I
try to run tomcat (w/ tomcat run, cause a new window closes to fast!) , the
output looks normal up until this:
Exception in thread main java.lang.InternalError: internal error: SHA-1
not available
at sun.security.provider.SecureRandom.init(SecureRandom.java:89)
... the error stack goes on for twenty or so lines...
I really would like to get this shtuff working! what have I overlooked?
THANK YOU ;P
{then when I try to put the error trace to a file for the sake of my hand-
(tomcat run err.txt), the output is there up until the errors, then it says
error report can be found inTOMCAT_HOME/logs/tomcat.log ... but its
not there!}
***
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are addressed. Any unauthorized review, use, disclosure or distribution
is prohibited. If you are not the intended recipient, please contact
the sender by reply e-mail and destroy all copies of the original
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RE: Authentication with NT4.0 login and password
Take a look at JAAS, Sun has released NT auth. module under JAAS umbrella. --V. -Original Message-From: João Folha [mailto:[EMAIL PROTECTED]]Sent: Monday, July 23, 2001 7:51 PMTo: [EMAIL PROTECTED]Subject: Authentication with NT4.0 login and password Hi there, I want to make an authentication process with NT login and password, can you help me please? How can i do that? cheers João Folha *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: java.lang.SecurityException: sealing violation?
as far as I know it means that you have a class name collision in two jars and one of them is sealed, I had a similar problem when using xml packages. Try to put jars foreign to tomcat in the begining of the classpath, or at the end... classpath reordering did it for me.. --V. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 13, 2001 11:46 AM To: [EMAIL PROTECTED] Subject: java.lang.SecurityException: sealing violation? Okay, I gave up on my tomcat installation. I wiped everything clean and then got all the source in the hopes that it might work better if I compiled vs. dropping binaries. So, there are many confusing aspects of the installation instructions regarding building the source. Seems like maybe the docs don't match up with the behavior of the current releases? Anyway, I plodded thru, I think I got everything straight. BUT, when I run startup.sh, I get the following: java.lang.SecurityException: sealing violation I followed the install instructions that came with the JSSE from Sun. Have no idea what this error means. Can anyone help? Thanks. - Jeremy *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: Tomcat 4.0b5 keeps shutting down
doesn't look like a tomcat problem. VM bug? -Original Message- From: Jakarta Jakarta [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 11, 2001 7:32 AM To: [EMAIL PROTECTED] Subject: Tomcat 4.0b5 keeps shutting down I am running Tomcat 4.0b5 in standalone mode on a Sun Solaris 8 system, running the latest patches and the currest Sun Java 1.3.1. Tomcat starts up ok, and will run for the better part of a day of testing, however the next morning, when I get up, the system is down again. Not sure if it's because I log out of the system or what it is. I have the following error I believe assuming the catalina.out file is written to the top instead of the end of the file: Starting service Tomcat-Standalone Apache Tomcat/4.0-b5 SIGSEGV 11* segmentation violation si_signo [11]: SIGSEGV 11* segmentation violation si_errno [0]: Error 0 si_code [1]: SEGV_MAPERR [addr: 0x28] stackpointer=FFBED230 Exiting Thread (sys_thread_t:0xff363df0) : no stack Exiting Thread (sys_thread_t:0x4191a0) : no stack Finalizer (TID:0x13b604, sys_thread_t:0x13b548, state:CW, thread_t: t@6, threadID:0xfecb1d78, stack_bottom:0xfecb2000, stack_size:0x2) prio=8 [1] java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:106) [2] java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:128) [3] java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:175) --- Reference Handler (TID:0x149a94, sys_thread_t:0x1499d8, state:CW, thread_t: t@5, threadID:0xfece1d78, stack_bottom:0xfece2000, stack_size:0x2) prio=10 [1] java.lang.Object.wait(Object.java:424) [2] java.lang.ref.Reference$ReferenceHandler.run(Reference.java:107) --- Signal dispatcher (TID:0x139284, sys_thread_t:0x1391c8, state:MW, thread_t: t@4, threadID:0xfed41d78, stack_bottom:0xfed42000, stack_size:0x2) prio=10 --- main (TID:0x385c4, sys_thread_t:0x38508, state:R, thread_t: t@1, threadID:0x25118, stack_bottom:0xffbf, stack_size:0x2) prio=5 *current thread* [1] org.apache.catalina.loader.StandardLoader.start(StandardLoader.java:586) [2] org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1092) [3] org.apache.catalina.core.StandardContext.start(StandardContext.java:3155) [4] org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1092) [5] org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1092) [6] org.apache.catalina.core.StandardEngine.start(StandardEngine.java:278) [7] org.apache.catalina.core.StandardService.start(StandardService.java:341) [8] org.apache.catalina.core.StandardServer.start(StandardServer.java:447) [9] org.apache.catalina.startup.Catalina.start(Catalina.java:725) [10] org.apache.catalina.startup.Catalina.execute(Catalina.java:647) [11] org.apache.catalina.startup.Catalina.process(Catalina.java:177) [12] java.lang.reflect.Method.invoke(Native Method) [13] org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:114) --- Any help would be appreciated as I need this working full time. Thanks. JR __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: getServletContext() throws NullPoinetException
Did you override init(ServletConfig config) method? YOu must call super(config) if you did... --V. -Original Message- From: Stefanos Karasavvidis [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 10, 2001 7:46 AM To: [EMAIL PROTECTED] Subject: getServletContext() throws NullPoinetException I've just installed tomcat 3.2.2 and have the following problem. I want to call getServletContext() from a servlets service method but get the folowing exception *Internal Servlet Error:* java.lang.NullPointerException at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:205) at TestServlet.service(TestServlet.java:32) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405) at org.apache.tomcat.core.Handler.service(Handler.java:287) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79 7) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection (Ajp12ConnectionHandler.java:166) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501) at java.lang.Thread.run(Thread.java:484) Moreover the getServletConfig() returns null which is probably the main reason for this problem Any ideas?? Stefanos *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: Reloading
Make sure the classes you're trying to reload are not on the system classpath --V. -Original Message- From: Hector Adolfo Alonso [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 10, 2001 7:44 AM To: [EMAIL PROTECTED] Subject: Reloading Hi servleters: I've making some tests trying to resolve when and how Tomcat does a servlet reloading. The spec says that when a servlet container makes a servlet reloading, it must discard all classes previouslly loaded for its context. This really works for Tomcat, but it doesn't work very well, at least for me. For example, if I change two servlets and some utility classes, one of the servlets and the utility classes, are reload, but no both of the servlets (not every time). I'm using Tomcat 3.2.2 with mod_jk / ajp13, Windows NT 4.0 SP6, JDK 1.2.2_008, Apache 1.3.20. I've read the release notes too. Does anybody know where I can find some useful information about this topic. Thanks in advance. Hector Adolfo Alonso Consist Teleinformatica S. A. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
RE: AccessControlException in Tomcat
Make sure you enable permissions for your application,
in your case you should have something like this in your
security file (default is conf/tomcat.security when using -security flag):
grant codeBase file:${tomcat.home}/webapps/ip {
permission java.io.FilePermission
C:\work\tomcat\webapps\ip\WEB-INF\lib\PerlTools.jar, read;
};
if this exception originates from your code. You didn't include complete
stack trace, so I dunno where it started. In a nutshell all
ProtectionDomain's (codebases) should have this permission. In case of
Tomcat this generally means that the permission should be granted to all
jars in ${TOMCAT_HOME}/lib, all files in ${TOMCAT_HOME}/classes and to
directory contatining WEB-INF of your application. BTW if you don't need to
run Tomcat in secure VM, just turn it off.
Regards,
V.
-Original Message-
From: Brian Lenz [mailto:[EMAIL PROTECTED]]
Sent: Monday, July 09, 2001 2:09 PM
To: [EMAIL PROTECTED]
Subject: AccessControlException in Tomcat
Hello,
I am running Tomcat 3.3 milestone 4 as an out-of-process servlet container
along with Apache Web Server. When I start up Tomcat, my application
initializes correctly. Additionally, I can successfully make requests to
the application through the web server.
However, before each request is fulfilled, Tomcat throws an
AccessControlException. The exception states that access is denied to one
of the included libraries (jar). The error is a java.io.FilePermission
error. Each time that this particular library is referenced, Tomcat throws
this exception and the application fails to handle the request. I can run
this identical application through Apache JServ and avoid this error, but I
would like to get it up and running in Tomcat as well. Does anyone have any
idea why a file access error might be happening in Tomcat? I've checked all
of the necessary file permissions, and they are all set up correctly. Is it
possible that Tomcat has tried to open the file twice and caused a file read
exception on its own? I have included the stack trace below for reference.
Also, I tried running the application in Tomcat 3.2.2 and ran into the same
problem.
I would appreciate any help anyone can give to me!
Thanks!
Brian
java.security.AccessControlException: access denied (java.io.FilePermission
C:\w
ork\tomcat\webapps\ip\WEB-INF\lib\PerlTools.jar read)' at
java.security.AccessControlException: access denied (java.io.FilePermission
C:\w
ork\tomcat\webapps\ip\WEB-INF\lib\PerlTools.jar read)
at
java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:279)
at
java.security.AccessController.checkPermission(AccessController.java:
405)
at
java.lang.SecurityManager.checkPermission(SecurityManager.java:551)
at java.net.URLClassLoader$4.run(URLClassLoader.java:468)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.getPermissions(URLClassLoader.java:466)
at
java.security.SecureClassLoader.getProtectionDomain(SecureClassLoader
.java:168)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:11
7)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$300(URLClassLoader.java:69)
at
java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java(Compiled
Code))
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java(Compiled
Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))
at
java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java(Compiled
Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java:257)
...
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webapp classloader ProtectionDomain (running secured tomcat)
Hi all, It seems that webapp classloader puts all classes loaded from a webapp directory into the same ProtectionDomain regardless of the location where the class was loaded from (like classes dir or a jar file). It means that any security grant entry granting permssions to a webapp codesource effectively grants the same set of permissions to each and every class in web application. This is probably fine in most cases but leaves no possibility to fine tune security within web-application. My particular problem is that I'm trying to use JAAS to enable access control with custom JAAS policy implementation. CodeSOurce partitioning that Sun suggests requires that the code sensitive to user-based operations shoud be put into separate ProtectionDomain for JAAS mechanisms to work. The only way to do this with Tomcat is to put classes someplace out of webapp directory, so they don't inherit any permissions assigned to webapp ProtectionDomain. I think that webapp class loader should put classes loaded from class directory and every jar file into diffrent protection domains, like class loaders that load classes from the system classpath in Java. Well, if all that makes any sense to you may be there's something I'm missing here? Just wanted to get other people's opinions... --Vlad. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
digest authentication using servlets
Hi all, I need to implement digest authentication using servlets. Just wondering if anyone came across something that can be reused. Is there any support for it in Tomcat? how do i use it if so? I'm also not sure if JDK itself provides any support for it. I see there's a class sun.net.www.protocol.http.DigestAuthentication but not sure how I can use it, it seems that it must be used on client side. Any pointers/clues will be greatly appreciated. Thanks, --Vlad. *** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ***
Re: Login Servlet
ps I'm surprised "boolean found = rs.next()" works if result set is empty.
I'd kind of expect a null pointer exception. I always do
if (rs != null rs.next()) {
// assign something
}
if i'm expecting a single row.
I guess there's a difference between an empty ResultSet and no ResultSet :)
--V.
Re: Tomcat startup problem
It might be that you don't set $TOMCAT_HOME.
The following script works on Linux, set vars to your values:
#!/bin/sh
TOMCAT_HOME=/usr/local/tomcat
export TOMCAT_HOME
JAVA_HOME=/opt/IBMJava2-13
export JAVA_HOME
case "$1" in
start)
echo -n "Starting Tomcat: "
$TOMCAT_HOME/bin/startup.sh
echo
;;
stop)
echo -n "Shutting down Tomcat: "
$TOMCAT_HOME/bin/shutdown.sh
echo
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
Jon Small wrote:
O/S: HP-UX 11.0
Apache: 1.3.12
Tomcat: 3.1
Anyone have/had the same problem? I can start Tomcat manually just fine, but
not successfully with an init script. It seems that the "java" process
starts initially, but at some point dies. I think that it dies when the init
script exits. We have it running fine with Linux, but it uses a "daemon"
command to make the "java" process a daemon. Any clues?
I use the standard SystemV init script:
case "$1" in
start)
echo -n "Starting tomcat: "
/usr/local/tomcat/bin/startup.sh
;;
stop)
echo -n "Shutting down tomcat: "
/usr/local/tomcat/bin/shutdown.sh
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
JDBCRealm reconnect problems?
Has anyone experienced JDBCReconnect problems??? Looks like mysql db connection times out and JDBCRealm cannot reopen it for some reason. Actually it tries to reopen it and somehow is able to authenticate a user, but then dies completely... Any ideas what can be wrong? This is the error/exceptions from tomcat log file: 2001-03-16 11:20:33 - ContextManager: JDBCRealm: The database connection is null or was found to be closed. Trying to re-open it. 2001-03-16 11:20:33 - ContextManager: JDBCRealm: There was an SQLException while in authenticate: null 2001-03-16 11:20:33 - ContextManager: JDBCRealm: SQLException: java.sql.SQLException: Error during query: Unexpected Exception: java.sql.SQLException message given: Communication link failure: java.io.IOException 2001-03-16 11:20:38 - ContextManager: JDBCRealm: The database connection is null or was found to be closed. Trying to re-open it. 2001-03-16 11:20:38 - ContextManager: JDBCRealm: JDBCRealm.authenticate: SELECT password FROM profiles WHERE username = ? 2001-03-16 11:20:38 - ContextManager: JDBCRealm: Authentication unsuccessful for user null 2001-03-16 11:20:47 - ContextManager: JDBCRealm: Authentication successful for user Walter 2001-03-16 11:20:47 - ContextManager: JDBCRealm: Auth ok, user=Walter 2001-03-16 11:20:47 - ContextManager: JDBCRealm: Controled access for Walter R( /ngs_web + /entering/buttons.jsp + null) Ct (jsp(org.apache.jasper.servlet.JspServlet/null) ) 2001-03-16 11:20:47 - ContextManager: JDBCRealm: There was an SQLException while in getUserRoles: Walter 2001-03-16 11:20:47 - ContextManager: JDBCRealm: SQLException: java.sql.SQLException: Error during query: Unexpected Exception: java.sql.SQLException message given: Communication link failure: java.io.IOException 2001-03-16 11:20:47 - ContextManager: JDBCRealm: Auth ok, user has no roles 2001-03-16 11:20:47 - ContextManager: JDBCRealm: UnAuthorized Y 2001-03-16 11:20:55 - ContextManager: JDBCRealm: The database connection is null or was found to be closed. Trying to re-open it. 2001-03-16 11:20:55 - Ctx( /ngs_web ): Exception in: R( /ngs_web + /entering/buttons.jsp + null) - java.lang.NullPointerException at org.gjt.mm.mysql.PreparedStatement.executeQuery(PreparedStatement.java:198) at org.apache.tomcat.request.JDBCRealm.authenticate(JDBCRealm.java:307) at org.apache.tomcat.request.JDBCRealm.authenticate(JDBCRealm.java:482) at org.apache.tomcat.core.ContextManager.doAuthenticate(ContextManager.java:837) at org.apache.tomcat.core.RequestImpl.getRemoteUser(RequestImpl.java:341) at org.apache.tomcat.request.JDBCRealm.authorize(JDBCRealm.java:503) at org.apache.tomcat.core.ContextManager.doAuthorize(ContextManager.java:855) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:789) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:498) 2001-03-16 11:21:00 - Ctx( /ngs_web ): Exception in: R( /ngs_web + /display/ngs_home.jsp + null) - javax.servlet.ServletException at java.lang.Throwable.init(Throwable.java:96) at java.lang.Exception.init(Exception.java:44) at javax.servlet.ServletException.init(ServletException.java:161) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:459) at display._0002fdisplay_0002fngs_0005fhome_0002ejspngs_0005fhome_jsp_4._jspService(_0002fdisplay_0002fngs_0005fhome_0002ejspngs_0005fhome_jsp_4.java:2404) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:177) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service(Handler.java:286) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at
Re: ClassCastException :(
I don't see how this would work... It doesn't matter what stores, it matters
what creates them... Probably, Context uses some sort of Hashtable
internally to store all objects, which is a core class by itself, and it
doesn't help the problem. So, I don't get
it. May be you can give more details?
Regards,
--VG
Allen Akers wrote:
I ran into the same problem and found the only good solution was to take
a look at my custom classes and strip away what was "custom" about them
and only save core Java objects to the context. When I need my custom
class, I create an instance of it and pass the references to the core
Java objects saved in the context to the class in the constructor so
that it is pointing to the objects in the shared context. There are
some limitations to this, but it works in all situations given a little
thought. Let me know if you need more clarification.
Allen Akers
Programmer Analyst
Strategic Web and Voice Development
[EMAIL PROTECTED]
[EMAIL PROTECTED] 03/15/01 09:46AM
Hello Vladimir,
Thank you for your help with classloaders. :)
I tried to put my "shared" classes in the classpath. But this approach
failed too. I cannot understand.
In this case my "shared" classes loaded by "Bootstrap class loader
(Java system classes)" and in case any references to them should use
above classloader. Even in case servlet reloading. Of course, I
removed
these classes from web-inf/classes directory.
May-be I need to load this "shared" class before loading my servlet,
that uses
this "shared" object? May-be it is loaded by "Webapp class loader
(contents of WEB-INF/classes)"? I don't know.
This situation doesn't hurt me. I just want to know, how other Tomcat
users deal with such problem. I think many projects use "shared"
objects between servlets. This situation may be happen only in
"development
stage" and never in "production". But let me know, how do you deal
with it?
Wednesday, March 14, 2001, 7:10:01 PM, you wrote:
VG Bo Xu wrote:
Andrey Myatlyuk wrote:
Hello Vladimir,
Thank you for your help.
And I'm still have some questions.
Why do we need to implement "some interface"? java.io.Serializable
I
think? But anyway I implemented this interface - it doesn't work.
This
approach works for EJB. :)
And my question is: Is there any way to use "some shared" object
with
reloadable servlets without Tomcat restart?
Thanks.
VG After reading this message and some thinking I can say that the
problem is
VG harder than I thought. There's no way to trick it, at least there's
no interface
VG you can create/implement to fix it... And of course it wasn't the
Serializable
VG one...
VG Sorry, for misleading... But... what about this:
VG Object _statesBean =
VG
getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
VG Class sBeanClazz = _statesBean.getClass();
VG Method m = sBeanClazz.getMethod("foo", new Class[] {/*args*/});
VG m.invoke(_statesBean, new Object{ /*params*/ });
VG he-he, ugly :) Not sure if it'll work...
VG Regards,
VG VG.
Wednesday, March 14, 2001, 3:16:45 PM, you wrote:
VG I think you're experiencing a standard Java class loader
problem.
VG Java treats classes loaded into different classloaders as
different
VG classes, even though they share the same full. qual. name.
VG Your recompiled servlets are reloaded by a brand new class
loader
VG to make sure the old classes are garbage collected. What you
get
VG from the context is actuially an instance of a class loaded
into
VG a different classloader, and (StatesBean) part in your
statement
VG causes StatesBean to be loaded again by this new classloader
that
VG reloaded your servlet, so
VG VM complains that you cannot cast objects since it thinks
they
VG are instances of 2 completely different classes. No matter
where
VG you place your files you'll have the same problem.
VG You can avoid this problem by writing some extra code and have
your
VG bean to implement some interface Extra work, just restart
VG Tomcat every time...
VG Regards,
VG VG.
VG Andrey Myatlyuk wrote:
Hello Tomcat users,
I'm in a trouble. I share some object(StatesBean) between
servlets. And when I
recompile _servlet_, I got ClassCastException about shared
object.
_statesBean=
(StatesBean)getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
Classfile for this object is placed in the same directory,
where
servlets do - web-inf/classes. Where I need to place classfile
for
this object to prevent Tomcat exceptions?
Of course, if I reload Tomcat everything is OK.
Thank you in advance!
--
Best regards,
Andrey
mailto:[EMAIL PROTECTED]
[...]
Hi :-) I am not sure, I
Re: ClassCastException :(
What you describe should work... Unless Tomcat web-app CL doesn't
adhere to standard CL delegation rules. Where did you put your classes?
I think $TOMCAT_HOME/classes is automatically appended to system classpath
by startup script.
I don't think _bootstrap_ CL is the one
that's loading classes if you put them on system classpath.
Probably it's SystemClassLoader. You can test
it like this from your servlet to find out what's going on:
_statesBean=
getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
ClassLoader cl = _statesBean.getClass().getClassLoader();
if (cl.getParent() == null)
System.out.println("Bootstrap Class Loader");
if (cl == ClassLoader.getSystemClassLoader())
System.out.println("System Class Loader")
if (cl == this.getClass().getClassLoader())
System.out.println("Current WebApps Class Loader");
If nothing is printed it means that your class is loaded by
some other class loader or a previous web-apps class loader ...
BTW, did you try to use reflection like I suggested before
(scroll down...)?
--VG.
Andrey Myatlyuk wrote:
Hello Vladimir,
Thank you for your help with classloaders. :)
I tried to put my "shared" classes in the classpath. But this approach
failed too. I cannot understand.
In this case my "shared" classes loaded by "Bootstrap class loader
(Java system classes)" and in case any references to them should use
above classloader. Even in case servlet reloading. Of course, I removed
these classes from web-inf/classes directory.
May-be I need to load this "shared" class before loading my servlet, that uses
this "shared" object? May-be it is loaded by "Webapp class loader
(contents of WEB-INF/classes)"? I don't know.
This situation doesn't hurt me. I just want to know, how other Tomcat
users deal with such problem. I think many projects use "shared"
objects between servlets. This situation may be happen only in "development
stage" and never in "production". But let me know, how do you deal
with it?
Wednesday, March 14, 2001, 7:10:01 PM, you wrote:
VG Bo Xu wrote:
Andrey Myatlyuk wrote:
Hello Vladimir,
Thank you for your help.
And I'm still have some questions.
Why do we need to implement "some interface"? java.io.Serializable I
think? But anyway I implemented this interface - it doesn't work. This
approach works for EJB. :)
And my question is: Is there any way to use "some shared" object with
reloadable servlets without Tomcat restart?
Thanks.
VG After reading this message and some thinking I can say that the problem is
VG harder than I thought. There's no way to trick it, at least there's no interface
VG you can create/implement to fix it... And of course it wasn't the Serializable
VG one...
VG Sorry, for misleading... But... what about this:
VG Object _statesBean =
VG getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
VG Class sBeanClazz = _statesBean.getClass();
VG Method m = sBeanClazz.getMethod("foo", new Class[] {/*args*/});
VG m.invoke(_statesBean, new Object{ /*params*/ });
VG he-he, ugly :) Not sure if it'll work...
VG Regards,
VG VG.
Wednesday, March 14, 2001, 3:16:45 PM, you wrote:
VG I think you're experiencing a standard Java class loader problem.
VG Java treats classes loaded into different classloaders as different
VG classes, even though they share the same full. qual. name.
VG Your recompiled servlets are reloaded by a brand new class loader
VG to make sure the old classes are garbage collected. What you get
VG from the context is actuially an instance of a class loaded into
VG a different classloader, and (StatesBean) part in your statement
VG causes StatesBean to be loaded again by this new classloader that
VG reloaded your servlet, so
VG VM complains that you cannot cast objects since it thinks they
VG are instances of 2 completely different classes. No matter where
VG you place your files you'll have the same problem.
VG You can avoid this problem by writing some extra code and have your
VG bean to implement some interface Extra work, just restart
VG Tomcat every time...
VG Regards,
VG VG.
VG Andrey Myatlyuk wrote:
Hello Tomcat users,
I'm in a trouble. I share some object(StatesBean) between servlets. And when
I
recompile _servlet_, I got ClassCastException about shared object.
_statesBean=
(StatesBean)getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
Classfile for this object is placed in the same directory, where
servlets do - web-inf/classes. Where I need to place classfile for
this object to prevent Tomcat exceptions?
Of course, if I reload Tomcat everything is OK.
Thank you in advance!
--
Best regards,
Andreymailto:[EMAIL PROTECTED]
[...]
Hi :-) I am not sure, I guess:
* perhaps the problem is:
Re: ClassCastException :(
BX * is StatesBean.STATES_BEAN_NAME.hashCode() the same one
BX before/after MyServlet reloading?
before:
hash code in state servlet=-24382515
hash code in name servlet=-24382515
hash code in city servlet=-24382515
after:
hash code in state servlet=-24382515
hash code in name servlet=-24382515
hash code in city servlet=-24382515
What did you expect??? hashCode() for string is overriden and will
always return the same number., even in different VM's...
public class StatesBean {
public static final String STATES_BEAN_NAME = "STATES_BEAN";
Re: Form based auth. again...
Christian Rauh wrote: Vladimir Grishchenko wrote: "Craig R. McClanahan" wrote: * Have the link on your home page exactly has you describe, but have the link point at a "Welcome To My Application" page inside the protected area. The fact that this page is protected will trigger the authentication dialog, and once the user has identified themselves, they will be welcomed to your app. From then on, they will have already been authenticated. The interface I want to use is similar to one found here: http://groups.google.com/ or here: http://developer.java.sun.com/developer/?frontpage-main You can see a login box on the first page, so I cannot really have a link to some page in protected area and make sure login form triggered... I just want to know if there are any tricks I can play to make it work with built in authentication, and form-based a. seems to be almost what I want, except the fact it must be triggered by a request to a protected resource. I am also facing the same problem and had an idea while reading your post. Maybe you can set a frame on your main page where you want the login to appear. That frame links to that welcome page proposed by Craig. What would actually be loaded on the frame is the login page. I'm thinking along the same lines... You could also embed a tiny invisible image in protected area to your front page (named /welcome, for example) and define your login form as /welcome?mode=login, so whenever you're not authorized welcome page is smart to display you a login form... The problem here is that it's difficult to display a meaningful message that a user needs to login whenever (s)he actually tries to get a real protected page since it'll always display /welcome?mode=login. Something like that... Havent tried it, tell me if it works if you do. And if you got any workaround by the way. I also seem to have read somewhere that you can do what you want using the JDBCRealm. Have you tried anything on that line? As far as I understand JDBCRealm has little to do with it. It's just a mechanism facilitating authentication, you give it [name, password, role] and it tells you if you're good to go using a database instead of tomcat-users.xml. that's it. Christian Rauh [EMAIL PROTECTED] NewTrade - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: Form based auth. again...
Daniel Lopez wrote: Hi Vladimir, snipped for brevity I'm thinking along the same lines... You could also embed a tiny invisible image in protected area to your front page (named /welcome, for example) and define your login form as /welcome?mode=login, so whenever you're not authorized welcome page is smart to display you a login form... The problem here is that it's difficult to display a meaningful message that a user needs to login whenever (s)he actually tries to get a real protected page since it'll always display /welcome?mode=login. Something like that... On that regards. Whe we developed our own authentication mechanisms, we also took into account this specific problem and what we did was the following: .- The authentication system tries to authorise the user. .- If it fails, it returns a meaningful error code as no_log_in, wrong_password, session_timed_out... .- The system then checks if there's a specific forward page for the error code, somewhere in the configuration file (something like forward.page.wrong_password="/check_pass.html") .- If it exists, it forwards control to the specific page, otherwise it forwards control to the default page which would be the login page. This way, if you want to return a meaningful message you just have to create an html file with the proper message and configure it appropriately. It's not mandatory but in some situations and depending on the "level of knowledge" of your users, this is a very useful feature. Of course, this would imply a more complex authentication system, even though not much, and it would be something outside the spec. I understand that you can write your own authentication mechanism, but I was looking into container based authentication... I think the scope of the original question is escaping from this thread Thanks anyway... Just my 2c, Dan Havent tried it, tell me if it works if you do. And if you got any workaround by the way. I also seem to have read somewhere that you can do what you want using the JDBCRealm. Have you tried anything on that line? As far as I understand JDBCRealm has little to do with it. It's just a mechanism facilitating authentication, you give it [name, password, role] and it tells you if you're good to go using a database instead of tomcat-users.xml. that's it. Christian Rauh [EMAIL PROTECTED] NewTrade - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: ClassCastException :(
I think you're experiencing a standard Java class loader problem. Java treats classes loaded into different classloaders as different classes, even though they share the same full. qual. name. Your recompiled servlets are reloaded by a brand new class loader to make sure the old classes are garbage collected. What you get from the context is actuially an instance of a class loaded into a different classloader, and (StatesBean) part in your statement causes StatesBean to be loaded again by this new classloader that reloaded your servlet, so VM complains that you cannot cast objects since it thinks they are instances of 2 completely different classes. No matter where you place your files you'll have the same problem. You can avoid this problem by writing some extra code and have your bean to implement some interface Extra work, just restart Tomcat every time... Regards, VG. Andrey Myatlyuk wrote: Hello Tomcat users, I'm in a trouble. I share some object(StatesBean) between servlets. And when I recompile _servlet_, I got ClassCastException about shared object. _statesBean= (StatesBean)getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME); Classfile for this object is placed in the same directory, where servlets do - web-inf/classes. Where I need to place classfile for this object to prevent Tomcat exceptions? Of course, if I reload Tomcat everything is OK. Thank you in advance! -- Best regards, Andreymailto:[EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: Form based auth. again...
Christian Rauh wrote: Vladimir Grishchenko wrote: Christian Rauh wrote: Vladimir Grishchenko wrote: I am also facing the same problem and had an idea while reading your post. Maybe you can set a frame on your main page where you want the login to appear. That frame links to that welcome page proposed by Craig. What would actually be loaded on the frame is the login page. I'm thinking along the same lines... You could also embed a tiny invisible image in protected area to your front page (named /welcome, for example) and define your login form as /welcome?mode=login, so whenever you're not authorized welcome page is smart to display you a login form... The problem here is that it's difficult to display a meaningful message that a user needs to login whenever (s)he actually tries to get a real protected page since it'll always display /welcome?mode=login. Something like that... I guess that what we both want is a way to call an url with the authentication parameters (user, password) and a page to redirect if everything is ok. Then Tomcat would do the authentication. I think that this behaviour may be emulated by creating a flash movie or applet that: 1 - Gets the username and password from the user 2 - Try to load any protected resource. This will put tomcat on "authentication state". This loading would be internal and not shown in the browser window. 3 - Then load j_security_check passing the appropriatte username and password variables obtained in 1. 4 - load the protected resource that you want on the browser window, a frame or _parent. IMO this sounds like more work than just writing your own authentication servlet... This applet should parse an incoming login page and emulate sending a post from j_security_chek... This may work. If I get the time I will try to implement it. I also seem to have read somewhere that you can do what you want using the JDBCRealm. Have you tried anything on that line? As far as I understand JDBCRealm has little to do with it. It's just a mechanism facilitating authentication, you give it [name, password, role] and it tells you if you're good to go using a database instead of tomcat-users.xml. that's it. yes, thats it. What I meant was that you may give a look into the JDBCRealm classes and create your own authentication mechanism. Dont know if it is possible though. Heard that some people were going into this direction. Christian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: javax.servlet.ServletException: sealing violation
Not sure if this is your case, but I had a similar problem when using JAXP 1.1. The problem is there's some sort of class name collision between jar files... I had to reorder the CLASSPATH for tomcat to get rid of this problem. Regards, VG. Mandar Joshi wrote: I just moved my server side java class to another directory and altered the classpaths to the new directory. I am getting follwoing exception while calling my jsp javax.servlet.ServletException: sealing violation at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp l.java:459) at jsp.dates._0002fjsp_0002fdates_0002fnewdate_0002ejspnewdate_jsp_0._jspServic e(_0002fjsp_0002fdates_0002fnewdate_0002ejspnewdate_jsp_0.java:91) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja va:177) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service(Handler.java:286) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79 7) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC onnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484) Root cause: java.lang.SecurityException: sealing violation at java.net.URLClassLoader.defineClass(URLClassLoader.java:234) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:297) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286) at java.lang.ClassLoader.loadClass(ClassLoader.java:253) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at com.commerceroute.rosettanet.xml.template.BaseTemplate.(BaseTemplate.java:14 ) at com.commerceroute.rosettanet.xml.template.CRMsg.(CRMsg.java:26) at com.commerceroute.sxmsgr.MsgCreator.(MsgCreator.java:31) at jsp.dates._0002fjsp_0002fdates_0002fnewdate_0002ejspnewdate_jsp_0._jspServic e(_0002fjsp_0002fdates_0002fnewdate_0002ejspnewdate_jsp_0.java:62) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja va:177) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service(Handler.java:286) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79 7) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC onnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484) Any idea why is this happening ? TIA Mandar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: ClassCastException :(
Bo Xu wrote:
Andrey Myatlyuk wrote:
Hello Vladimir,
Thank you for your help.
And I'm still have some questions.
Why do we need to implement "some interface"? java.io.Serializable I
think? But anyway I implemented this interface - it doesn't work. This
approach works for EJB. :)
And my question is: Is there any way to use "some shared" object with
reloadable servlets without Tomcat restart?
Thanks.
After reading this message and some thinking I can say that the problem is
harder than I thought. There's no way to trick it, at least there's no interface
you can create/implement to fix it... And of course it wasn't the Serializable
one...
Sorry, for misleading... But... what about this:
Object _statesBean =
getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
Class sBeanClazz = _statesBean.getClass();
Method m = sBeanClazz.getMethod("foo", new Class[] {/*args*/});
m.invoke(_statesBean, new Object{ /*params*/ });
he-he, ugly :) Not sure if it'll work...
Regards,
VG.
Wednesday, March 14, 2001, 3:16:45 PM, you wrote:
VG I think you're experiencing a standard Java class loader problem.
VG Java treats classes loaded into different classloaders as different
VG classes, even though they share the same full. qual. name.
VG Your recompiled servlets are reloaded by a brand new class loader
VG to make sure the old classes are garbage collected. What you get
VG from the context is actuially an instance of a class loaded into
VG a different classloader, and (StatesBean) part in your statement
VG causes StatesBean to be loaded again by this new classloader that
VG reloaded your servlet, so
VG VM complains that you cannot cast objects since it thinks they
VG are instances of 2 completely different classes. No matter where
VG you place your files you'll have the same problem.
VG You can avoid this problem by writing some extra code and have your
VG bean to implement some interface Extra work, just restart
VG Tomcat every time...
VG Regards,
VG VG.
VG Andrey Myatlyuk wrote:
Hello Tomcat users,
I'm in a trouble. I share some object(StatesBean) between servlets. And when I
recompile _servlet_, I got ClassCastException about shared object.
_statesBean=
(StatesBean)getServletContext().getAttribute(StatesBean.STATES_BEAN_NAME);
Classfile for this object is placed in the same directory, where
servlets do - web-inf/classes. Where I need to place classfile for
this object to prevent Tomcat exceptions?
Of course, if I reload Tomcat everything is OK.
Thank you in advance!
--
Best regards,
Andreymailto:[EMAIL PROTECTED]
[...]
Hi :-) I am not sure, I guess:
* perhaps the problem is:
- let use suppose: classloaderA - classA - instanceA
then you "setAttribute" instanceA into ServletContext of
this wepapp, so now ServletContext holds a reference to
instanceA.
- after a while, your Sevlet class is reloaded, with
jakarta-tomcat-4.0-b1, now classloaderA is not there,
so classA is not there, But instanceA is there: because
at least there is One reference of instanceA is being holded
by ServletContext, so it will not be GCed, and getAttribute()
will not return null.
- but now instanceA doesn't has "its original class" and "its
original classloader", I am not sure, but I guess perhaps it is
the reason.
* IMHO, I guess: if you can find a way to load classA from a
special classloader which will not be destroyed when/even if
your Servlet class is reloaded, then you can solve the problem.
It means that our Servlet class and some Helper classes are
loaded by several classloaders in "diferent layer". if we don't
want to keep a Attribute "across Servlet reloading", perhaps
we don't need to it; but if we want, and we are sure that the
"webapp classloader" will be destroyed and re-made, than I
guess perhaps we have to use classloaders which are in
"diferent layer".
* the following is a good email about the classloader:
// good email
On Sat, 10 Mar 2001, David Wall wrote:
There appears to be a serious problem with the classpath/classloader with
Tomcat 3.2.1.
It may be related to the Jasper engine, which outputs a dynamic classpath
name that includes all of the classes and jars in the WEB-INF directory, as
expected. But is the same classloader used when servlets are loaded at
startup according to the web.xml file?
The same class loader is used to load all classes within a particular web
application, but there is more to the story than that. See below.
Anyway, I'm not sure where the problem resides, but I have found that by
setting the CLASSPATH to the same thing Jasper sets up (specifically those
files in WEB-INF/classes and WEB-INF/lib),
Re: Tomcat Security example and Admin Tool
Yep, for Context admin add a user with role admin to tomcat-users.xml Boon Yeo wrote: Has anyone successfully got the Tomcat JSP Security example running? What about Tomcat Context Admin Tools? -Boon
Re: xml reader
Download JBuilder 4 foundation. It has tree-like view of XML/HTML docs... JEdit might be good also... IE5 can show XML in tree-like form [EMAIL PROTECTED] wrote: can anyone suggest the best compatible xml reader. Currently I am using word but it is really slow and takes time to browse through... - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: PLEASE HELP TO REMOVE ME FROM THE LIST
Did you try to fool it? It might not work if you use MS Exchange server or such, but for plain SMTP messaging you can (well, ising Netscape mail, MS mail clients should have similar options) go to Edit-Preferences-MailNewsgroups-Identity and change your e-mail address to whatever you want ([EMAIL PROTECTED]). Then send mail to [EMAIL PROTECTED] Hope this helps. "Xu, Lifeng" wrote: My email system changed my address. So I am having problem to unsubscribe myself. Please help to remove me from the list. My current address on the list is [EMAIL PROTECTED] (or [EMAIL PROTECTED]), and my new address with our mailing system is [EMAIL PROTECTED] Thanks Lifeng - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Form based auth. again...
Hi, Just wondering if it's possible to get built-in form based authentication to work without the user actually trying to access a protected resource? I want to have a login box on the first page that users can use to authenticate themselves at my web-site. As you can guess simply specifying "j_security_check" as form's action won't work. So, is there any way to accomplish this just using Servlet 2.2 specified form based auth. mechanism or I need to resort to some sort of custom security/session checker servlet??? Briefly looked through the mailing list archives and couldn't find any info. Thanks in advance, VG. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: getPathInfo() returns null
OK, I haven't tried it yet, but this is certainly my problem.
I have neither of the solutions implemented (/* or SerfvletPath)
in my case.
I'll give it a try.
Thanx,
Vlad.
Karl Martino wrote:
The following code will take care of your troubles. It was explained
to me recently that URL patterns to servlets like "/*" are actually
inccorret. They mask *.jsp and other possible extentions.
You should, when you have to, map a servlet to a path ending with
"/". But pathInfo disappears then. The following code should handle
BOTH mappings for you:
String servletPath = req.getServletPath();
String pathInfo = req.getPathInfo();
if (pathInfo == null) {
pathInfo = servletPath;
}
servletPath has the same data as pathInfo when a servlet is mapped to
"/".
Giver a try.
--- Marc Saegesser [EMAIL PROTECTED] wrote:
I tested this in 3.2.2b1 using the SnoopServlet that comes with the
examples
web app and it seems to work fine.
To test test it yourself you'll need to make a small modification
to
examples/web-inf/web.xml. Change the url-pattern for snoop to be
/snoop/*
instead of /snoop. Then you can try the following URLs and see if
the
pathinfo appears correctly in both cases.
http://localhost:8080/examples/servlet/SnoopServlet/pathinfo
and
http://localhost:8080/examples/snoop/pathinfo
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 02, 2001 6:45 PM
To: [EMAIL PROTECTED]
Subject: Re: getPathInfo() returns null
"Craig R. McClanahan" wrote:
Vladimir Grishchenko wrote:
Hi,
I'm new to Tomcat and servlets and need some help.
Would somebody clarify why getPathInfo() returns null when a
servlet accessed via:
http://server/context/servletalias/pathinfo
and it returns "pathinfo" when the same servlet accesses via:
It actually returns "/pathinfo", right?
yes
http://server/context/servlet/servletalias/pathinfo
Both invocatoin options seem to work (except the Pathinfo
part), which is the "correct"
way to call servlets? What is the difference?
What version of Tomcat does this? You are correct -- you
should be able to retrieve the
path info in either case.
3.2.1
Could my configuration be messed up???
Thanx,
Vlad.
Craig McClanahan
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Re: QuickSorting Vectors
Ooops...
Replace
java.util.Arrays.sort(elementData, 0, elementCount - 1);
with
java.util.Arrays.sort(elementData, 0, elementCount);
I claim this is faster (inspired by the Vector's source code, he-he):
public class VladsVectorSort {
SortableVector vec = new SortableVector();
public static void main(String[] args) {
VladsVectorSort v = new VladsVectorSort();
v.arraySimpleSort();
}
void arraySimpleSort() {
vec.add(new String("abbot"));
vec.add(new String("silium"));
vec.add(new String("randy"));
vec.add(new String("goofy"));
vec.add(new String("zenia"));
vec.add(new String("pokie"));
vec.add(new String("xylaphone"));
vec.add(new String("dogface"));
vec.add(new String("friggen-joe"));
vec.add(new String("penuckle"));
vec.add(new String("charlie"));
vec.add(new String("manna"));
System.out.println("before: " + vec);
vec.sort();
System.out.println("after :0) : " + vec);
}
class SortableVector extends java.util.Vector
{
public synchronized void sort()
{
java.util.Arrays.sort(elementData, 0, elementCount - 1);
}
}
}
This is it (at least it seems to be!)
Of course you need to make sure all Vector elements are mutually
Comparable...
--V.
Craig O'Brien wrote:
Vlad and I were thinking along the same lines. This is easy but may not be
the best for commercial applications.
Here is a simple program I just wrote:
class CraigsVectorSort {
Vector vec = new Vector();
public static void main(String[] args) {
CraigsVectorSort v = new CraigsVectorSort();
v.arraySimpleSort();
}
void arraySimpleSort() {
vec.add(new String("abbot"));
vec.add(new String("silium"));
vec.add(new String("randy"));
vec.add(new String("goofy"));
vec.add(new String("zenia"));
vec.add(new String("pokie"));
vec.add(new String("xylaphone"));
vec.add(new String("dogface"));
vec.add(new String("friggen-joe"));
vec.add(new String("penuckle"));
vec.add(new String("charlie"));
vec.add(new String("manna"));
System.out.println("before: " + vec);
Object[] obArr = vec.toArray();
Arrays.sort(obArr);
vec.removeAllElements();
for (int i = 0; i obArr.length; i++) {
vec.add(obArr[i]);
}
obArr = null;
System.out.println("after :0) : " + vec);
}
}
It works efficiently. You may want to consider using one of the collections
rather then Vector. You may not need the synchronization so an ArrayList
would be faster. Many many considerations.
Let me know what you think.
Regards,
Craig O'Brien
Java Programmer/Web Developer
[EMAIL PROTECTED]
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 02, 2001 6:40 PM
To: [EMAIL PROTECTED]
Subject: Re: QuickSorting Vectors
Don't have a sample but you can
take a look at the java.util.Arrays's sort(Object[]) method.
May be you can use that in combination with Vector.toArray()
which calls System.arraycopy, so this should be fast, may be
even faster than iterating over Vector's elements during
custom sort if you decide to sort Vectors directly.
method...
--V.
Ryan wrote:
I am a student but this is not for a class.. I am trying to keep a thread
running that holds files in a directory. I just want to maximize my
bandwith
and CPU usage for my web site.
-ryan
- Original Message -
From: "Stefn F. Stefnsson" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, March 02, 2001 5:21 PM
Subject: RE: QuickSorting Vectors
R U a student?
When is the deadline?
-Original Message-
From: Ryan [mailto:[EMAIL PROTECTED]]
Sent: 3. mars 2001 00:46
To: [EMAIL PROTECTED]
Subject: QuickSorting Vectors
Does anyone have a quicksorting class that sorts Vectors containing
Strings that wouldn't mind letting me look at?
-ryan
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Re: QuickSorting Vectors
I missed that Array.sort() excludes last index from sorting
Craig O'Brien wrote:
Hey,
Good job. Nice trick. I messed around with an ArrayList and
Collections.sort which was faster then my original (the 15 minute job) but
yours was still faster. I tried your trick only to find out that in
ArrayList the elementData field is private. :0( Short of customizing an
implementation List myself you win. for now
What was the deal with making your array 1 element shorter then mine?
Competitive edge right?
Good luck and thanks for the idea.
By the way, how is your Tomcat doing? hehe
Got to get back to work.
Regards,
Craig
--The comparison code -- (includes ArrayListSort)
import java.util.*;
class TestVectorSort{
Vector vec = new Vector();
SortableVector vVec = new SortableVector();
ArrayList arrList = new ArrayList();
public static void main(String[] args) {
TestVectorSort v = new TestVectorSort();
v.arraySimpleSort();
}
void arraySimpleSort() {
// the hack...hehe
for (int i = 1; i 0; i--) {
vec.add(new String("" + i));
}
long timeIn = System.currentTimeMillis();
Object[] obArr = vec.toArray();
Arrays.sort(obArr);
vec.removeAllElements();
for (int i = 0; i obArr.length; i++) {
vec.add(obArr[i]);
}
long timeOut = System.currentTimeMillis();
obArr = null;
System.out.println("Time to sort CraigsVectorSort: " + (timeOut -
timeIn)
+ " ms");
// VladsVectorSort
for (int i = 1; i 0; i--) {
vVec.add(new String("" + i));
}
long timeIn2 = System.currentTimeMillis();
vVec.sort();
long timeOut2 = System.currentTimeMillis();
System.out.println("Time to sort VladsVectorSort: " + (timeOut2 -
timeIn2)
+ " ms");
// ArrayListSort
for (int i = 1; i 0; i--) {
arrList.add(new String("" + i));
}
long timeIn3 = System.currentTimeMillis();
Collections.sort(arrList);
long timeOut3 = System.currentTimeMillis();
System.out.println("Time to sort ArrayList: " + (timeOut3 - timeIn3)
+ "
ms");
arrList = null;
vVec = null;
vec = null;
System.gc();
}
}
class SortableVector extends java.util.Vector
{
public synchronized void sort()
{
java.util.Arrays.sort(elementData, 0, elementCount);
}
}
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 05, 2001 9:59 AM
To: [EMAIL PROTECTED]
Subject: Re: QuickSorting Vectors
Ooops...
Replace
java.util.Arrays.sort(elementData, 0, elementCount - 1);
with
java.util.Arrays.sort(elementData, 0, elementCount);
I claim this is faster (inspired by the Vector's source code, he-he):
public class VladsVectorSort {
SortableVector vec = new SortableVector();
public static void main(String[] args) {
VladsVectorSort v = new VladsVectorSort();
v.arraySimpleSort();
}
void arraySimpleSort() {
vec.add(new String("abbot"));
vec.add(new String("silium"));
vec.add(new String("randy"));
vec.add(new String("goofy"));
vec.add(new String("zenia"));
vec.add(new String("pokie"));
vec.add(new String("xylaphone"));
vec.add(new String("dogface"));
vec.add(new String("friggen-joe"));
vec.add(new String("penuckle"));
vec.add(new String("charlie"));
vec.add(new String("manna"));
System.out.println("before: " + vec);
vec.sort();
System.out.println("after :0) : " + vec);
}
class SortableVector extends java.util.Vector
{
public synchronized void sort()
{
java.util.Arrays.sort(elementData, 0, elementCount - 1);
}
}
}
This is it (at least it seems to be!)
Of course you need to make sure all Vector elements are mutually
Comparable...
--V.
Craig O'Brien wrote:
Vlad and I were thinking along the same lines. This is easy but may not
be
the best for commercial applications.
Here is a simple program I just wrote:
class CraigsVectorSort
getPathInfo() returns null
Hi, I'm new to Tomcat and servlets and need some help. Would somebody clarify why getPathInfo() returns null when a servlet accessed via: http://server/context/servletalias/pathinfo and it returns "pathinfo" when the same servlet accesses via: http://server/context/servlet/servletalias/pathinfo Both invocatoin options seem to work (except the Pathinfo part), which is the "correct" way to call servlets? What is the difference? Thanx, Vlad. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
