Re: Problema con tomcat
Buenos dias William, personalmente no se responser a su pregunta, seria mucho mejor si usted pueda escribir en Inglés asi de aumentar las probabilidades de obtener una respuesta. Cordialmente, Simo http://people.apache.org/~simonetripodi/ http://www.99soft.org/ 2011/1/25 Fierro, William Alfonso william.fie...@hp.com: Buen día Estimados En la actualizadad tengo una aplicación configurada con Apache Tomcat/5.5.30, en la cual se encuentran 6 tomcat configurados, he notado que al realizar la verificación de los tomcat atravez de apache, estos muestran hasta 700 conexiones al momento de realizar la revisión, sin embargo, cuando realizo la revisión de los tomcat, por probe, me muestra la cantidad real de usuarios conectados a la herramienta. Cuando reviso por apache, los tomcat tienen hasta 700 conexiones, al revisarlos por probe, muestra el real hasta 50 conexiones. Agradezco la colaboración que me puedan brindar. Cordialmente, William Fierro. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Is it possible to replace the HttpSession implementation in Tomcat?
Hi Evgeny, thanks a lot for shared your experience, very interesting. I'd like to plug something magic that could avoid me configuring a filter, I started investigating about a possible use of AOP HttpSession. If anyone is interested, I'll share my results when done. Best regards!!! Simo http://people.apache.org/~simonetripodi/ On Tue, Feb 23, 2010 at 7:51 AM, Tsirkin Evgeny tsir...@gmail.com wrote: Just in case somebody will google for a solution for replacing session. I have done this . First of all ,why: We have cluster of 2 machines . Each have a separate db on it . The machines are sharing information using nfs mounting fs. Each machine runs it's own apache server ,(no apache balancer in front). There IS a hardware load balancer in front of this but sometime it fails to route already open sessions to same host. So,we can't : 1. share sessions using files ,because this would be same file for 2 tomcats and because this would fail on nfs . 2. we can't use tomcat cluster because there are cases when BOTH tomcat would be shut down or restarted and session would be loosed. 3. we can't use a db because there is no central db - each host has it's own one. 4. to complicate issue machines could be added/removed to the cluster. What we did - override session object using filter.On each request start it would read it's info from db (any configured one ,but preferring the local one) On each request end it would write itself into ALL dbs that are configured to be used. Although the obvious problem here is the writing to more then 1 db and reading from a db on each request ,this really works good thanks for mysql to be so fast on simple read/write. I have even implemented a simple lock mechanism for session . What more - this solution is portable ,it worked for us on SunONE server and now on tomcat. Thanks Evgeny On Tue, Feb 16, 2010 at 9:54 PM, Simone Tripodi simone.trip...@gmail.comwrote: Hi Martin, very interesting, thanks for share it!!! I did, more or less, the same on a project for a customer, but it was strictly related to the application, your stuff looks much much better of mine and it is a reusable module. All the best, Simo http://people.apache.org/~simonetripodi/http://people.apache.org/%7Esimonetripodi/ On Tue, Feb 16, 2010 at 6:02 PM, Martin Grotzke martin.grot...@javakaffee.de wrote: Hi Jon, On Mon, 2010-02-15 at 11:55 -0600, Jon Brisbin wrote: I'm trying to figure out today how I can implement a Valve or something that can store a session to a backend DB and reload that session on another Tomcat instance similar to how the PersistentManager loads user's session after a restart. Would a Valve based on PersistentValve allow me to implement a cluster-like solution such that a user login causes a write to a central database and a load balanced request to another server would see that user without forcing another login? You might have a look at the http://code.google.com/p/memcached-session-manager/ which is a session failover solution storing sessions in memcached. When the project was created I only thought of applications using sticky sessions but it should also work with non-sticky sessions if sessions are stored in memcached synchronously (sessionBackupAsync needs to be set to false, see [1]). The memcached-session-manager basically is a session manager implemention, the most interesting part is the MemcachedBackupSessionManager ([2]) if you want to have a look at the code. Cheers, Martin [1] http://code.google.com/p/memcached-session-manager/wiki/SetupAndConfiguration [2] http://github.com/magro/memcached-session-manager/blob/master/core/src/main/java/de/javakaffee/web/msm/MemcachedBackupSessionManager.java Jon Brisbin Portal Webmaster NPC International, Inc. On Feb 15, 2010, at 11:05 AM, Simone Tripodi wrote: Hi all guys and very nice to meet the Tomcat community, I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Thanks in advance, every suggestion will be very appreciated. Simo [1] http://www.hazelcast.com/ http://people.apache.org/~simonetripodi/http://people.apache.org/%7Esimonetripodi/ - 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
Re: Is it possible to replace the HttpSession implementation in Tomcat?
Hi Martin, very interesting, thanks for share it!!! I did, more or less, the same on a project for a customer, but it was strictly related to the application, your stuff looks much much better of mine and it is a reusable module. All the best, Simo http://people.apache.org/~simonetripodi/ On Tue, Feb 16, 2010 at 6:02 PM, Martin Grotzke martin.grot...@javakaffee.de wrote: Hi Jon, On Mon, 2010-02-15 at 11:55 -0600, Jon Brisbin wrote: I'm trying to figure out today how I can implement a Valve or something that can store a session to a backend DB and reload that session on another Tomcat instance similar to how the PersistentManager loads user's session after a restart. Would a Valve based on PersistentValve allow me to implement a cluster-like solution such that a user login causes a write to a central database and a load balanced request to another server would see that user without forcing another login? You might have a look at the http://code.google.com/p/memcached-session-manager/ which is a session failover solution storing sessions in memcached. When the project was created I only thought of applications using sticky sessions but it should also work with non-sticky sessions if sessions are stored in memcached synchronously (sessionBackupAsync needs to be set to false, see [1]). The memcached-session-manager basically is a session manager implemention, the most interesting part is the MemcachedBackupSessionManager ([2]) if you want to have a look at the code. Cheers, Martin [1] http://code.google.com/p/memcached-session-manager/wiki/SetupAndConfiguration [2] http://github.com/magro/memcached-session-manager/blob/master/core/src/main/java/de/javakaffee/web/msm/MemcachedBackupSessionManager.java Jon Brisbin Portal Webmaster NPC International, Inc. On Feb 15, 2010, at 11:05 AM, Simone Tripodi wrote: Hi all guys and very nice to meet the Tomcat community, I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Thanks in advance, every suggestion will be very appreciated. Simo [1] http://www.hazelcast.com/ http://people.apache.org/~simonetripodi/ - 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 -- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Is it possible to replace the HttpSession implementation in Tomcat?
Hi all guys and very nice to meet the Tomcat community, I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Thanks in advance, every suggestion will be very appreciated. Simo [1] http://www.hazelcast.com/ http://people.apache.org/~simonetripodi/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Is it possible to replace the HttpSession implementation in Tomcat?
Hi Cris, thanks for your reply and nice to meet you :) There's no specific reason why I don't want to use the built-in session replication, even if I'd be able to realize what I've in my mind, the sysadmins will never let me know to use it since they're confident with the Tomcat solution. BTW, I'm just curious and like very much integrating heterogeneous software layers in an original way, so before spending time in studying the Tomcat code and understand how to realize my crazy stuff I wrote the email :P Thanks, all the best, Simo http://people.apache.org/~simonetripodi/ On Mon, Feb 15, 2010 at 6:10 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Simone, On 2/15/2010 12:05 PM, Simone Tripodi wrote: I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Why not use the session replication that comes with Tomcat? Otherwise, presumably Hazelcast knows how to integrate their own product with Tomcat. You might have better luck asking them. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5f/AACgkQ9CaO5/Lv0PBs2ACgh/CsaG1mdvnENrcw5Zt8cn10 tPgAni7x4ZGDvBiT2+wIoPZ5QwuOBKNG =P+WC -END PGP SIGNATURE- - 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
