Most strict / conservative setting for SimpleTcpCluster - channelSendOptions
Hi there, What is the strictest / most conservative setting for channelSendOptions when using SimpleTcpCluster for session replication (synchronous + ack + ??) ? I have a web-app where each request dependes on the session-state of the previous one and unfortunatelyI have to deploy in an environment where a round-robin load-balancer is used. I had a look at the documentation (the examples online were not that clear - in the docs it is only mentioned 8 is async, whereas 6 is later used without any explanation), however to be honest I am not sure which combination I actually require. Thank you in advance, Clemens - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Class.forName doesn't find classes located in WEB-INF/lib
Hi, I have a servlet which dynamically loads classes from jar-files located in WEB-INF/lib/, however tomcat somehow seems to ignore those jar-files. in WEB-INF/lib/Notepad.jar there is a class Notepad.class (without any package), however loading that class yields: Loading Application Class: Notepad java.lang.ClassNotFoundException: Notepad at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:186) at net.java.openjdk.cacio.servlet.AppStarter.doGet(Unknown Source) Any idea what could be the problem here? Does tomcat use some kind of security manager which is blocking class-loading? Thank you in advance, Clemens - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Class.forName doesn't find classes located in WEB-INF/lib
Hi Martin, 3)webapp (everything found in WEB-INF/lib and WEB-INF/classes) you are using system classloader to loaf WEB-INF/lib jar use the webapp classloader So according to this, the servlet as well as the classes from WEB-INF/lib are loaded with the same classloader? What I did in the servlet was basically: this.getClass().forName(Notepad); I've now changed the code to (where this refers to the Servlet): ClassLoader loader = this.getClass().getClassLoader(); Class cls = loader.loadClass(className); However loader in this case is null, any idea what is going on? Thank you in advance, Clemens ClassLoader webinf_loader=AClassInWebINFLib.getClass().getClassLoader(); boolean initialize=true; static Class? clazz= java.lang.Class.forName(YourClassName, initialize, webinf_loader) Martin __ Verzicht und Vertraulichkeitanmerkung/Note de déni et de confidentialité Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene Empfaenger sein, so bitten wir hoeflich um eine Mitteilung. Jede unbefugte Weiterleitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht dient lediglich dem Austausch von Informationen und entfaltet keine rechtliche Bindungswirkung. Aufgrund der leichten Manipulierbarkeit von E-Mails koennen wir keine Haftung fuer den Inhalt uebernehmen. Ce message est confidentiel et peut être privilégié. Si vous n'êtes pas le destinataire prévu, nous te demandons avec bonté que pour satisfaire informez l'expéditeur. N'importe quelle diffusion non autorisée ou la copie de ceci est interdite. Ce message sert à l'information seulement et n'aura pas n'importe quel effet légalement obligatoire. Étant donné que les email peuvent facilement être sujets à la manipulation, nous ne pouvons accepter aucune responsabilité pour le contenu fourni. Date: Mon, 6 Jun 2011 23:47:25 +0200 Subject: Class.forName doesn't find classes located in WEB-INF/lib From: linuxhi...@gmail.com To: users@tomcat.apache.org Hi, I have a servlet which dynamically loads classes from jar-files located in WEB-INF/lib/, however tomcat somehow seems to ignore those jar-files. in WEB-INF/lib/Notepad.jar there is a class Notepad.class (without any package), however loading that class yields: Loading Application Class: Notepad java.lang.ClassNotFoundException: Notepad at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:186) at net.java.openjdk.cacio.servlet.AppStarter.doGet(Unknown Source) Any idea what could be the problem here? Does tomcat use some kind of security manager which is blocking class-loading? Thank you in advance, Clemens - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Does Tomcat ignore jsessionID URL's when usually cokies are used for session handling?
Hi, I have to integrate an applet into a larger html-based webapp. The html-based application uses cookies for session management, however the applet uses url-rewriting (jsessionid=...). My plan would be to pass the session-id to the applet as an applet-tag parameter, and simply re-write the applet's request URLs accordingly. What I wonder is, will Tomcat use the url-sessionid, if no cookie is submitted and session-handling is set to cookie? Thanks, Clemens - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Howto enable SSL/https for the tomcat-embedded version?
Hello,
To do some development/testing I would like to enable SSL/https for my
embedded tomcat version.
The SSL tutorial suggests to modify server.xml, however this version
of tomcat doesn't seem to have this file - instead all the
configuration seems to be done by the ant build.xml file which is used
to start it.
I guess I would have to add another Connector, which accepts SSL.
For now there'r only the plain non-ssl connector enabled:
mbean name=${domain}:type=Connector,port=9080
code=org.apache.catalina.connector.Connector
modeler=true
attribute name=port value=9080 /
/mbean
Any idea howto alther the configuration to enable ssl?
Thank you in advance, Clemens
-
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Re: Tomcat with support for asyn servlets (3.0)?
There is a draft 3.0 spec but no APIs at present. Once there is a draft with some APIs I image there will be a Tomcat 7 branch that will remain alpha at least until the spec is final. Thanks :) lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Using tomcat to hold many open connections.
Jetty has a special api to allow exactly this kind of request efficiently. The thread is not kept assignd to the sleeping connection, but is re-used. lg Clemens 2008/10/6 Kees Jan Koster [EMAIL PROTECTED]: Dear Uprooter, I'm looking for a server that has to hold many (web services) remote clients for controlling them. I want to do things like sending power off command to a bunch of machines remotely. Building a botnet? :-) The clients are usually windows machines behind firewalls NAT or web proxies that only allow HTTP (this is why I thought of webservices) The regular request-response fashion that servlet follows is not suitable here since the initiator of the operation is the server. What can I do in order to solve this and still use web services? If you have the resources, you can just block in the servlet on your server. It's pretty expensive since Tomcat uses a thread per request I believe. Java threads are expensive (256kB each?), so that adds up quickly. You could spend some time tuning your thread stacks, though. Depending on your actual number of clients, you should be able to get this to work with a few GB of RAM. But then, 20K client polling once an hour might be cheaper. You may want to find a way to stagger the requests though. -- Kees Jan http://java-monitor.com/forum/ [EMAIL PROTECTED] 06-51838192 The secret of success lies in the stability of the goal. -- Benjamin Disraeli - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat with support for asyn servlets (3.0)?
Hi, Is there some version of tomcat which implements support for suspend/resume servlet functionality currently discussed in the JSR? I know Jetty6/NIO has a proprietary API for this, but if possible I would prefer to build it arround the expected standard way. Thank you in advance, Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Differentiate Tomcat 6.x with Tomcat 5.x
Now that was just plain unnecessary. Sure it was a lazy question, but you could always just delete it. Sorry it was absolutly not my intention to send this mail to the list I guess it was just an over-reaction caused by all those over-spammed forum.java.sun.com forums :-/ lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Differentiate Tomcat 6.x with Tomcat 5.x
Hohoho, Happy Christmas! By the way: Read the fucking manual! lg Clemens 2007/9/3, MOHD SUFIAN BIN ZAKARIAH ZAKARIAH [EMAIL PROTECTED]: Hello I have something question about Tomcat version. I want to know that Tomcat 6.x have difference with Tomcat 5.x and other. Can give explaination about function both of Tomcat. Thank you for all cooperation. - Bosan dengan spam? Mel Yahoo! memiliki perlindungan spam yang terbaik http://my.mail.yahoo.com/ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat on Plesk
as far as I know this is not possible with Plesk. To be honest I had very ugly experiences with Plesk+Tomcat, I've to use it but I personally hate it, and it does not work very well. (Uploaded servlets take ages till they become active, status report is wrong, non-existent logging in plesk itself, ...). lg Clemens 2007/8/7, Mark Benussi [EMAIL PROTECTED]: I've installed Tomcat on port 9080 (SSL 9443) on a box running Plesk. What do I have to do to get requests on the box forwarded from 80 and 443 on to Tomcat 9080 and 9443. I am normally happy to play but this is a production box and the administrators have little knowledge outside of Plesk standard features. With regards, Mark Benussi, IBT Services [EMAIL PROTECTED] Tel +44 870 850 1081 Mob +44 7714 767407 Fax +44 7092 094490 HYPERLINK http://www.ibt.com/; _ This communication and any attachments contain information which is confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient(s) please note that any form of disclosure, distribution, copying or use of this communication or the information in it or in any attachments is strictly prohibited and may be unlawful. If you have received this communication in error, please return it with the title Received in error to [EMAIL PROTECTED] then delete the email and destroy any copies of it. E-mail communications cannot be guaranteed to be secure or error free, as information could be intercepted, corrupted, amended, lost, destroyed, arrive late or incomplete, or contain viruses. We do not accept liability for any such matters or their consequences. Anyone who communicates with us by e-mail is taken to accept the risks in doing so. HYPERLINK skype:mark_benussi?add No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.8/940 - Release Date: 06/08/2007 16:53 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Are there frameworks for in-cluster communication?
Hello, I know this question is a bit off-topic, but I can't resist to ask directly where all the cluster-specialists are ;) Are there special (best would be open-source) frameworks for in-cluster communication? I have to make a large servlet-based solution cluster-ready and it seems to be really hard because: - There are shared resources which are accessed the way if(resource.getState) - resource.setState(). For now these areas where protected by a synchronized-block locking on a SingleTon. To solve this problem I would need something lock a distributed locking framework or something like that. - Shared data. There is lots of data shared between sessions living in Singletons too - imagine a global, shared sketchboard where everybody can draw to. The software uses a clever mechanism which lets request wait for e.g. 10s and respond event-driven if something changes For now I solved the locking-problem with simply implementing a backery-locking-algorythmn reading/writing to a database - however the overhead is terrible of course. The only software I found was JGroups, however because it uses Multicasting its kind of hard to configure (not really suited or out-of-box readyness). Are there other maybe simpler frameworks which are also designed to solve the above issues? Sorry again for generating traffic and thanks a lot for Tomcat6 - the NIO connectors are wonderful :-) lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Are there frameworks for in-cluster communication?
Hello, Terracotta? http://www.terracotta.org/ Thanks a lot for your answer. Wow teracotta really looks impressive and very powerful- however its too heavy for my use. It needs servers and clients started and so on which is problematic because I don't have any control over the servers :-/ I tinkered a bit arround and the only thing I would really need would be distributed Lock.acquire/wait/notify, best would be simply a library which I tell about the available servers and which uses normal tcp/ip to communicate with all others and detects if a machine goes down. Does something exist at all? Thank you in advance, lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to run a .exe file from a web application in tomcat
By the way using an exe-drawing tool is maybe a bad idea because this would mean your clients all need to be win32/i386 computers. I guess something like that should not be too hard to do with an Java-based drawing tool you could embed as applet and you write the Http upload/download code. lg Clemens 2007/3/22, Tim Lucia [EMAIL PROTECTED]: Tomcat is running on a server, say tomcat.mycompany.com. The user is sitting on their computer, say mypc.othercompany.com. The two speak http to each other. Thus, if you want the client (mypc.othercompany.com) to edit a file, you must send it from the server (tomcat.mycompany.com) to the client, i.e., download, edit it locally, and then post it back to the server (i.e., upload.) HTH, Tim -Original Message- From: Jitendra Ch [mailto:[EMAIL PROTECTED] Sent: Thursday, March 22, 2007 11:23 AM To: Tomcat Users List Subject: RE: How to run a .exe file from a web application in tomcat Actually my requirement is like that. The client wants to edit the image file so that he can he can do some changes. and also he wants to edit the control.xml file for these reasons I thought of calling an .exe for Drawing tool, is there any way for that? please help me Date: Thu, 22 Mar 2007 16:06:24 +0100 From: [EMAIL PROTECTED] To: users@tomcat.apache.org Subject: Re: How to run a .exe file from a web application in tomcat Jitendra Ch wrote: Hi to allI am new member to this group. I am having some problems in calling an .exe file for example notepad, from a web application using Tomcat.Is it possible to call an .exe file from a web application in Tomcat. Why do you want remote clients run separate applications on server's desktop? -- Mikolaj Rydzewski [EMAIL PROTECTED] _ Search from any Web page with powerful protection. Get the FREE Windows Live Toolbar Today! http://toolbar.live.com/?mkt=en-in - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Howto ensure session consistency in a cluster?
Hello, I've some questions about servlets and session management in a clustered tomcat installation: - The servlet I've developed is really sensitive to session-consistency because it uses some extra encryption (not https), it supports many other backends (among servlet) where https may not be available. This encryption-state exists per-session. Therefor two requests at the same time with the same session will lead to a failure (but can happen because the client is multithreaded). Is there any possibility to tell tomcat that a session may used/opened only once at a time or is this done automatically? For now (one server) I simply synchronize on one lock-attribute, which does not work in a cluter of course. - Is the bea-apache plugin also capable of parsing out session-id-rewritten URLs or only session-cookies? Will this plugin try to route the same session-id to the same cluster when possible? - Do all session-attributes have to implement Serializeable? - How does tomcat now whan a mutable session-attribute has changed and needs to be sent over network? - Is there any possibility to do locking over all clusters? We have some external resources why may only be accessed one at a time, and e.g. an cluster-aware implementation of ReentrantLock would really help me. Thank you in advance, lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Should I manually buffer my streams I get from the servlet-container?
Hello, I wonder wether I should manually buffer the streams I get from HttpRequest/HttpResponse by wrapping it in an BufferedStream? Is does Tomcat (and whats about other servlet containers) take care about Buffereing? Furthermore are the streams provided by Tomcat synchronized? Thank you in advance, lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Suddenly server only throws ClientAbortException :-/
Hello, One of our users is using Tomcat 4.1.29/java-1.4.2 on w2k3 server, and he has strange problems with our webservice. Tomcat suddenly throws at every request a ClientAbortException, like the following: ERROR 2006-10-30 07:21:17,736 - ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error at org.apache.coyote.tomcat4.OutputBuffer.realWriteBytes(OutputBuffer.java:404) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:353) at org.apache.coyote.tomcat4.OutputBuffer.writeBytes(OutputBuffer.java:432) at org.apache.coyote.tomcat4.OutputBuffer.write(OutputBuffer.java:419) at org.apache.coyote.tomcat4.CoyoteOutputStream.write(CoyoteOutputStream.java:108) at com.agosys.unicom.servlet.UnicomServlet.handleRequest(UnicomServlet.java:84) The problem can only be resolved by restarting the service. If this is a known problem - I don't care and advice my user to upgrade, however its kind of hard if I am not sure (those are production servers at a very large company). Is this a known problem, is there something I could do to prevent these failures or whats causing them? Thank you in advance, lg Clemens - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Suddenly server only throws ClientAbortException :-/
Thanks a lot for the hint Chuck, I think I know what happened, tomcat ran out of heap so the JVM tried to agressivly free some space and wasted some minutes. When there was enough free space to complete the request, the connection already had timed out. Its just a thought but seems quite realistic when looking at the logfiles. I'll see wether it happens again, thanks for your help and your suggestions. Thanks, lg Clemens 2006/11/3, Caldarale, Charles R [EMAIL PROTECTED]: From: Clemens Eisserer [mailto:[EMAIL PROTECTED] Subject: Suddenly server only throws ClientAbortException :-/ Tomcat suddenly throws at every request a ClientAbortException, like the following: ERROR 2006-10-30 07:21:17,736 - ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error at org.apache.coyote.tomcat4.OutputBuffer.realWriteBytes(OutputBuffer.java: 404) On the face of it, it looks like the client simply closed its end of the connection; could also be anything in between the client and server, such as an IIS or httpd front end, a load balancer, a proxy, firewalls, etc. What does netstat show, from both the client and server sides? If this is repeatable in any kind of predictable fashion, you could monitor the network traffic with Ethereal or some other tool and see if any TCP resets are coming across. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat and Threads
Hello, I've created a servlet wich creates some threads for doing background stuff. Till now I never worried about these thread since I was runnning this servlet only on my own servers. However now I subscribed to a servlet-hosting service which uses a shared tomcat enviroment. How does tomcat handle these threads? Will they be destroyed by tomcat as soon as I click stop in Tomcat's application manager or will I have to take care about them? Thank you in advance, lg Clemens - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
