RE: Speed of jsp:useBean tags.
Technically (and I haven't looked at the usebeans source to confirm) using usbeans should be faster. The reason is that unless absolutely necessary, the code should pass around a reference to the bean, not make a copy of it which would be slow. So event if you add this bean to multiple scopes, there will be only one copy. Using a series of setAttribute methods would be slower as there is a lot more code being executed. Now having said that, I would not have thought that in the final count there would be any visible difference. Unless you are calling thousands of methods, the visible difference would be practically nothing. I would be looking at the process that is taking the 8 seconds. Is there any way you can speed this up ? Break it up into parts and time each part - where is the time being taken ? For example you might find that the database access is slow. Looking at the queries you might see some which are not using indexes, etc. Hope this helps. Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! -Original Message- From: Andoni [mailto:[EMAIL PROTECTED] Sent: Wednesday, 10 November 2004 10:59 PM To: Tomcat Users List Subject: Speed of jsp:useBean tags. Hello, I have an application which is just a front-end for a main-frame. The process on the mainframe which my application calls takes 8 seconds to complete so I am trying to make my Java application as fast as possible so that there is as little time as possible wasted. Can anybody give any tips or sites for speeding up Tomcat/Java/Webapps? Can anybody tell me if using jsp:useBean tags to pass an entire object to a JSP is a slow way of doing things? Am I quicker passing a list of strings using various request.setAttribute() methods? Or is this insignificant? I am really stuck because I don't know how to choose the best way of going forward. If I can't significantly improve the speed of the app. I should just abandon the project but that is not desirable as you can imagine! Andoni. __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: Buffering and redirection to the errorPage
This sounds like something I have encountered. The basic question is that how do you redirect to an error page if youa re writing to the output stream rather than going to another JSP, and have an exception ? Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! -Original Message- From: Carl Olivier [mailto:[EMAIL PROTECTED] Sent: Thursday, 11 November 2004 1:09 AM To: Tomcat Users List Subject: Buffering and redirection to the errorPage Greetings. I have a question with regards buffering of output and subsequent errorPage redirection. Maybe I am missing something. The default buffer size for a JSP page response is 8kb. If an exception is thrown AFTER 8kb has been written (and the initial chunks has been committed) then the redirection to the errorPage (if specified) does not occur. Does this sound right? I have solved this during debugging by increasing the buffer size to a larger kb amount on offending pages, then removing the setting once debugging has occurred. Is there anyway to enforce the redirection to the errorPage? Thanks. Carl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: hide source of a page
If you mean the raw source before execution of JSP code and tags then yes because this text is never sent to the browser. If you mean the resulting HTML then no it cannot be blocked at all because the browser has to be able to see it in order to render it. Some people have tried tricky javascript stuff to stop popup menus and the likes, but the reality it that these are too easy to get around and even if you cannot see it in the browser, you can easily see it by looking in your cache. Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! -Original Message- From: Sunitha Kumar [mailto:[EMAIL PROTECTED] Sent: Tuesday, 9 November 2004 11:55 AM To: [EMAIL PROTECTED] Subject: hide source of a page Hi folks: Can viewing the source code of a page be blocked in tomcat? thanks, -sunitha - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: hide source of a page
Hmm, that's a huge effort to go to. I would be interested to know what sort of applications people consider it important to hide the html for. For normal web pages I cannot see any reason why you would bother. After all, the important thing is the content not the html. And in reality, html is just content plus tags so why worry about whether someone can see them ? Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! -Original Message- From: Frank W. Zammetti [mailto:[EMAIL PROTECTED] Sent: Tuesday, 9 November 2004 2:35 PM To: Tomcat Users List Subject: Re: hide source of a page I had such a requirement at work one time, although fortunately I talked some sense into the higher-ups and they forgot about it, but not before I worked up an entire proof-of-concept document. IN THEORY, this could make it very difficult for would-be hackers, although I wouldn't say fullproof. The idea was to set up a frameset with one invisible frame and one full-screen frame. Into the invisible frame would go an ActiveX control that was encrypted with a custom binary encrypter program (could be an applet too, but obfuscation isn't as good as encoding a binary). Basically, every form submission to the server would go through the control, and every response from the server would go through it, both encrypted. On the response from the server, HTML is generated out of the control and placed into the frame in an obfuscated form. Javascript it used to guard against right-clicks and keyboard shortcuts, and since the app starts up in it's own chromless window, it's relatively secure from most clientside exploits. There is a handshake between the control and the server at startup that basically sets up a temporary public/private key pair, the point being to make it impossible to just issue commands via Telnet. You'd have to fake considerably more than just some URLs or header variables. So, the idea is that you could probably still get at the source, but it wouldn't be in cache so you'd probably have to use a memory scanner, but even if you did that it would be in an obfuscated form. Not impossible to decypher, but probably hard enough that most people wouldn't both. Getting at the server is going to be difficult. You could still decompile the control, but that's not going to be at all easy either considering the obfuscation and encryption (think a PE compactor approach). I think making it tough is about as good as you can hope to do, but as Steven said, it's ALWAYS going to be defeatable one way or another. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com Steven J. Owens wrote: On Mon, Nov 08, 2004 at 09:37:09PM -0500, Dov Rosenberg wrote: The only thing I can think of to hide the source of the page is to create your own private label browser or perhaps load the source of the page in a hidden frame and use some javascript to display the text you want. Not sure why you would want to go thru the hassle - there are lots of ways to defeat any measure. You're right, this is futile, because it's trivial to get the source of the page, no matter what you do at the browser level. The browser has to see the source to render it, therefore the server is providing the source, upon request, to anything that knocks at port 80 and asks for it. Getting the source is as simple as telnetting to the webserver on port 80 and faking the commands. Or run a packet sniffer in the network you're browsing from. Or run a logging http proxy on your own machine and point your browser at it. You can't show something to people and keep it secret at the same time. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: is it possible to go to https and return to http?
Hi, Our site drops in and out of secure mode to do credit card transactions. We have a single instance of tomcat sitting behind an apache server. We have two virtual apache servers listed which talk to this tomcat. One os non-secure which takes the bulk of the action, and the other is setup as secure. When we want to take a user to secure, the next document is simple linked as a https connection rather than http. As the secure server is listening on the 443 port it picks it up instead of the non-secure one. The only issue we encountered when doing this is that when this happens it starts a new session. So anything stored in the http session (shopping basket) cannot been seen. The original designers of the system got arround this by using an RMI server and transfering objects through it to the new session. To say this was complicated and error prone would be an understatement. Recently we ripped this out and added the ID of the http session as a parameter to the urls going into the secure instance. By doing this, the Tomcat automatically looked for and reconnected to the orginal session. Thus allowing us to keep things simple and remove a lot of bug ridden code. Hope this helps. Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! -Original Message- From: Acácio Furtado Costa [mailto:[EMAIL PROTECTED] Sent: Thursday, 4 November 2004 4:32 AM To: [EMAIL PROTECTED] Subject: is it possible to go to https and return to http? We need to use https for authentication and in 1 or to 2 url´s in our application. In other case we prefer to stay in http mode . To do this we need to redirect the connection to https and return to http . How can we do this? Acacio Furtado Costa Pesquisa e Tecnologia GIA - Magnesita S/A *(0xx31) 3368-1349 * [EMAIL PROTECTED] __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
Tomcat just STOPS
Hi all, Tricky bug. We've been all over our system and cannot figure out what is going on. The tomcats (we have 2 tomcat 4.1.24's behind an apache server, just stop reponding after a couple of days. Restart them and everything is fine. Then some undefinied period later, one or both will just stop ahain. It can be as little as an hour or as a long as a week. But they will not stay up reliably. No errors are produced in the logs and there are no messages indicating anything is wrong. Has anyone encountered this ? Regards, Derek Clarkson Global Applications Lonely Planet Publications ph: (03) 8379-8000 x8041 It's not a bug - it's an undocumented feature! __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
Load balancing for uptime
Hi all, We have an app written in a mix of JSP, servlets and struts across 3 instances of apache, tomcat and an RMI server. To say that it's a pile of smelly stuff is an understatement, however it works (mostly) and our customers depend on it. At least once a week though it crashes with out of memory errors. Until we can redesign and fix it we are looking for a way to keep it up. One suggest has been to have two servers running with a common DB server, and to use a load balancer to allow us to keep one server up whilst we boot the other, then vice versa. Thus on a daily basis we can reboot both machines whilst mainting a working system for the users. Can anyone see any problems with this ? I'm concerned about issue realed to session management, etc. Ciao Derek __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: Loosing sessions when poping a window
Hmm, the popup is this case is definitely accessing a different domain. We have our main site www.foo.com and a secure site for transactions (secure.foo.com). We actually don't care about sessions on the popup secure site because it uses it's own session. The problem appears to be that once the popup has been fired, the main (www.oursite.com.au) site looses it's session. We are also having problems with people who run two browsers on two of our sites. This also causes session lose. Although I am inclined to think that the real problem is the browsers over writing each others cookies. My real problem is that I have not been able to find much doco which discusses session tracking on multiple sites and multiple browsers. So if you know any please link me to it ;-) I have gotten around most of this by setting the cookies domain to be .foo.com with a path of /, but ideally I would like to not have to do this and let Tomcat do it's thing so that we don't have to have cookies enabled. If it was me, I would never have designed it this way, but the system was built by someone else ;-) Ciao D -Original Message- From: Mike Curwen [mailto:[EMAIL PROTECTED] Sent: Saturday, 6 March 2004 4:18 AM To: 'Tomcat Users List' Subject: RE: Loosing sessions when poping a window We had a cookie problem here at work, and it was all the same domain, and we couldn't figure it out.. until we recognized that foo.com and www.foo.com were two *different* domains, and therefore the browser would treat them differently. So we have apache set up like so: virtual host name: foo.com alias www.foo.com Someone accesses foo.com they're redirected (internally) to login.jsp (under foo.com) then they put in their user/pass and their session is prepopulated. Then they are issued a sendRedirect to 'www.foo.com'. An apparently authenticated user accesses www.foo.com they're redirected (internally) to login.jsp (under www.foo.com) the second authentication then succeeds. In fact they both did, but to the end user it looks like they have to login twice. And of course, it works fine if you just came in through www.foo.com Is the popup perhaps accessing something like this? (looks like the same domain but isn't)? As for this: This may be part of the problem as my research indicates that tomcat regard path changes as being context changes and therefore issues a new session. Does the popup load something from a completely different webapp context? If this is the case, then the jsessionid wouldn't work, because it's tied to the first context. It's not just a 'simple' path change, like on a web server. It's a whole new app. -Original Message- From: Derek Clarkson [mailto:[EMAIL PROTECTED] Sent: Thursday, March 04, 2004 5:25 PM To: 'Tomcat Users List' Subject: RE: Loosing sessions when poping a window Yes, here is my reply to the postings you linked to: Hello everyone, I just found this posting. I have had the same problem. Opening a window causes the session to change. BIG NOTE: I have reproduced this in FireFox - therefore it is NOT IE specific. I solved it by writing a cookie for JSESSIONID explicitly setting the domain to our domain and the path to the root path /. It seems these two parameters are required to solve this. Interestingly enough, when I monitored the cookies being used through out the program, I would regularly see two cookies called JSESSIONID. One my custom built cookie and the other being Tomcats session tracking one. What interesting is that despite setting the domain and path, both cookies returned nulls in these fields. I'm still trying to figure out how Tomcat sees a new window as a new session, although within my app, we are also loading a jsp from a different path. This may be part of the problem as my research indicates that tomcat regard path changes as being context changes and therefore issues a new session. Hope this helps. Derek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Loosing sessions when poping a window
Yes, here is my reply to the postings you linked to: Hello everyone, I just found this posting. I have had the same problem. Opening a window causes the session to change. BIG NOTE: I have reproduced this in FireFox - therefore it is NOT IE specific. I solved it by writing a cookie for JSESSIONID explicitly setting the domain to our domain and the path to the root path /. It seems these two parameters are required to solve this. Interestingly enough, when I monitored the cookies being used through out the program, I would regularly see two cookies called JSESSIONID. One my custom built cookie and the other being Tomcats session tracking one. What interesting is that despite setting the domain and path, both cookies returned nulls in these fields. I'm still trying to figure out how Tomcat sees a new window as a new session, although within my app, we are also loading a jsp from a different path. This may be part of the problem as my research indicates that tomcat regard path changes as being context changes and therefore issues a new session. Hope this helps. Derek.
Loosing sessions when poping a window
Hello everyone, I've been tracking this for days. I'm using a Tomcat 4.1.29/IE6 setup. I've inherited an application written in a mix of JSP, struts and servlets (A mess). The application stores a user object in the session when it logs on. This works fine until it pops a window to talk to a secure server. When you close this window and return to the main window, the next jsp creates a new session instead of reusing the one initially create. Hence it cannot find the user object and assumes they have logged of. The only solution I've found is to create a JSESSIONID cookie and set the domain to my domain and path = /. I would prefer to let Tomcat do the session tracking so that it can handle browsers with cookies turned of. Has anyone encountered this problem and can give me a better idea of what is going on ? At the moment I think that tomcat is creating new sessions if the JSPs are in different paths. I.e. server.com/a.jsp and server.com/mydir/b.jsp would have different sessions. At leasts that appears to be part of the problem. Any ideas ? Ciao D
Newbie problem with Sessions
Hi guys, Not sure if I'm in the right list for this ;-) I'm trying to debug an application which has basically been cobbled together by a number of previous programmers using a mix of servlets, jsp and struts. The app also uses 3 contexts - 2 normal and 1 secure via apache. The problem is this, if I log on and setup some stuff on the main site, the software uses the same session through out. Security is done but storing a user object in the session. If I then perform a CC transaction which requires the secure server to be used and then come back to the main server, the session is lost and the system insists I logon again. Then every time I try to access a page it keeps creating new sessions and insisting I relogon. This only seems to happen after I access the secure server. I have to restart the browser to get everything working again. I've logged the session ids which is how I tell when it starts accessing different sessions. The software appears to have originally been written to use cookies, but whilst they are stored, they are not used anywhere. Questions: 1. If the software creates and stores a cookie, but never actually retrieves it, can this effect the session ? I've read something about cookies controlling sessions, but I don't know how this works. 2. What sort of things will cause a server to start a new session ? Any help much appreciated. Ciao Derek.
RE: Can someone direct me to the documentation.
Thanks Filip, I've never looked at that before. I'd just looked at the class files thinking it might be in there. I'll have a good read of it know that I have it ;-) Ciao Derek. -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, 27 February 2004 12:26 PM To: Tomcat Users List Subject: RE: Can someone direct me to the documentation. why document it again, when you have it in the specification :) http://java.sun.com/products/servlet/download.html#specs Filip -Original Message- From: Derek Clarkson [mailto:[EMAIL PROTECTED] Sent: Thursday, February 26, 2004 5:20 PM To: Tomcat Users List Subject: Can someone direct me to the documentation. Hi all, I've found over time that the Apache and associated projects web site is either extremely good, or extremely bad when it comes to finding certain pieces of documentation. The lastest one that's been driving me nuts is wanting to find a reference to the tags that can be set inside the servlet namespace in a web.xml file. Specifically I was hunting for details on the load-on-startup tag, what it did exactly and what the numbers ment. I seached the Apache sites, the web, everything I could find and all I got was some references in various news groups. It was enough to tell me what I needed to know, but I would still like to know where the offical reference is for this part of the web.xml file. Can anyone point me to a URL ? Ciao Derek. __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner. --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.594 / Virus Database: 377 - Release Date: 2/24/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.594 / Virus Database: 377 - Release Date: 2/24/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Can someone direct me to the documentation.
Hi all, I've found over time that the Apache and associated projects web site is either extremely good, or extremely bad when it comes to finding certain pieces of documentation. The lastest one that's been driving me nuts is wanting to find a reference to the tags that can be set inside the servlet namespace in a web.xml file. Specifically I was hunting for details on the load-on-startup tag, what it did exactly and what the numbers ment. I seached the Apache sites, the web, everything I could find and all I got was some references in various news groups. It was enough to tell me what I needed to know, but I would still like to know where the offical reference is for this part of the web.xml file. Can anyone point me to a URL ? Ciao Derek. __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: log comming big after....
Been looking at log4j recent. It has the ability to specify sizes on log files and what to do with them once they are full. Ciao Derek. -Original Message- From: FRANCOIS Dufour [mailto:[EMAIL PROTECTED] Sent: Friday, 27 February 2004 12:43 PM To: [EMAIL PROTECTED] Subject: log comming big after hi to all my video chatt aplication have to serve image from user end to other user end the log file is simply growing every second is there a way to keep only like the 20 last request in log? thank in advance [EMAIL PROTECTED] administrateur http://entre-nous.qc.tc _ MSN Search, le moteur de recherche qui pense comme vous ! http://fr.ca.search.msn.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
Trying to get Struts 1.1 working with tomcat in Eclipse
Hi all, I have tomcat 4.1.29 installed and am trying to get it to fire up in Eclipse. So far it runs, however if I include the struts.jar from the struts 1.1 directory I downloaded, tomcat throws an exception claiming it cannot find the StandardServer class. If I use an older struts.jar from my struts 1.0 directory it works fine. I cannot see why it should have problems finding the StandardServer. Any ideas ? Exception details :- 17/02/2004 17:39:19 org.apache.commons.digester.Digester startElement SEVERE: Begin event threw exception java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer at java.net.URLClassLoader$1.run(URLClassLoader.java:199) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:187) at java.lang.ClassLoader.loadClass(ClassLoader.java:289) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274) at java.lang.ClassLoader.loadClass(ClassLoader.java:235) at org.apache.commons.digester.ObjectCreateRule.begin(ObjectCreateRule.java:252 ) at org.apache.commons.digester.Rule.begin(Rule.java:200) at org.apache.commons.digester.Digester.startElement(Digester.java:1273) at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unkno wn Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElem entHook(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc her.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1548) at org.apache.catalina.startup.Catalina.start(Catalina.java:449) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl .java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) Catalina.start: java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer at org.apache.commons.digester.Digester.createSAXException(Digester.java:2540) at org.apache.commons.digester.Digester.createSAXException(Digester.java:2566) at org.apache.commons.digester.Digester.startElement(Digester.java:1276) at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unkno wn Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElem entHook(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc her.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1548) at org.apache.catalina.startup.Catalina.start(Catalina.java:449) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl .java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) __ This email, including attachments, is intended only for the addressee and
Multiple instances of Tomcat - why would you do it ?
Hello everyone, I've just started a new job where I've been asked to be the tech lead on a project. The software originated from an external company who designed it to run on 3 instances of tomcat. There is an instance for the main applications for our customers, an instance for the admin section and another for secure transactions. All running on the same PC. These instances also communicate between each other in order to pass information from one to the other via RMI. I've never worked on a mulit instance installation before and no-one here knows why it was done this way (it's not documented). Can you guys give me any thoughts on why a multi-instance might be setup like this ? What are the advantages over a single tomcat instance, etc ? Essentially I'm trying to understand whether this was a good solution for our use. Understanding the sorts of reasons for doing it will help me to work out any possible future changes. Ciao Derek. __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner.
RE: Multiple instances of Tomcat - why would you do it ?
He he, thanks. By the looks of the code I'm seeing - I'm going with the space bats reason ;-) -Original Message- From: Josh Rehman [mailto:[EMAIL PROTECTED] Sent: Thursday, 12 February 2004 12:41 PM To: Tomcat Users List Subject: Re: Multiple instances of Tomcat - why would you do it ? If the instances talk to each other via RMI, it's likely that the original developers intended each instance to be run on a different box. They may have thought this would positively affect scalability. It may also be that they partitioned the app such that each container has different priveledges and responsibilities, and therefore it made sense to seperate them and configure them seperately. It may also be that the original developer was testing a theory and so did it that way. It may also be that the developers were being paid per CPU. It may also be that one of the architects was driven mad by alien space bats, and so designed this system to prepare himself for leaving this planet. The last one seems most likely to me. However, I could be wrong, so I'd ask the original developer. Derek Clarkson wrote: Hello everyone, I've just started a new job where I've been asked to be the tech lead on a project. The software originated from an external company who designed it to run on 3 instances of tomcat. There is an instance for the main applications for our customers, an instance for the admin section and another for secure transactions. All running on the same PC. These instances also communicate between each other in order to pass information from one to the other via RMI. I've never worked on a mulit instance installation before and no-one here knows why it was done this way (it's not documented). Can you guys give me any thoughts on why a multi-instance might be setup like this ? What are the advantages over a single tomcat instance, etc ? Essentially I'm trying to understand whether this was a good solution for our use. Understanding the sorts of reasons for doing it will help me to work out any possible future changes. Ciao Derek. __ This email, including attachments, is intended only for the addressee and may be confidential, privileged and subject to copyright. If you have received this email in error, please advise the sender and delete it. If you are not the intended recipient of this email, you must not use, copy or disclose its content to anyone. You must not copy or communicate to others content that is confidential or subject to copyright, unless you have the consent of the content owner. -- Josh Rehman citysearch.com 213.739.3559 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Class not being found - please help !
Hi all, We've got tomcat 4.1 running in linux and have successfully loaded the postgres drivers by placing the jar file in the /var/tomcat4/common/lib directory and developed a site. However, I have just created a java class which I wish to use on the site, but every time I try to load the class in a JSP page I get this error : Generated servlet error: /var/tomcat4/work/Standalone/localhost/_/index_jsp.java:72: cannot resolve symbol symbol : class wwSecurity location: class org.apache.jsp.index_jsp I first tried placing the class in a jar in the /var/tomcat4/common/lib/ directory. I then tried /var/tomcat4/shared/lib. I also tried placing the .class file in the classes directories of these locations and the WEB-INF/classes directory. Of course I restarted tomcat after each attempt. I have not been able to get tomcat to find the class once. Can anyone help ? Derek Clarkson Web: http://users/bigpond/net/au/drekka - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Class not being found - please help !
Thanks all. The problem was purely because I had not placed the classes into packages. It now works fine. On Thursday 06 February 2003 11:49, Nicole Hibbard wrote: I'm kinda a newbie, but I'll try to help. Your class file should be under the same directory as you jsp in the WEB-INF folder. For example: I have a test.jsp that uses GetTestResults. Then there should be (in the same directory as the jsp) a WEB_INF folder containing the GetTestResults.class file. Good Luck -Original Message- From: Derek Clarkson [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 05, 2003 4:44 PM To: [EMAIL PROTECTED] Subject: Class not being found - please help ! Hi all, We've got tomcat 4.1 running in linux and have successfully loaded the postgres drivers by placing the jar file in the /var/tomcat4/common/lib directory and developed a site. However, I have just created a java class which I wish to use on the site, but every time I try to load the class in a JSP page I get this error : Generated servlet error: /var/tomcat4/work/Standalone/localhost/_/index_jsp.java:72: cannot resolve symbol symbol : class wwSecurity location: class org.apache.jsp.index_jsp I first tried placing the class in a jar in the /var/tomcat4/common/lib/ directory. I then tried /var/tomcat4/shared/lib. I also tried placing the .class file in the classes directories of these locations and the WEB-INF/classes directory. Of course I restarted tomcat after each attempt. I have not been able to get tomcat to find the class once. Can anyone help ? Derek Clarkson Web: http://users/bigpond/net/au/drekka - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Derek Clarkson Web: http://users/bigpond/net/au/drekka - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
