Re: Does Tomcat work on dual processor systems?
So, essentially, your web application is creating server socket instances and listening on them outside the context of Tomcat, right? That is, from your servlet code you are doing something like (new java.net.ServerSocket()).accept() ? Why do you call the ports are random? Is it because your servlet is exporting and registering UnicastRemoteObjects, i.e., also acting as an RMI server? If so, then any issue you are seeing has got nothing to do with Tomcat or processor details but your network configuration? Is yours a multi-home server? Asha Nallana [EMAIL PROTECTED] 09/08/2005 05:13 PM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject Re: Does Tomcat work on dual processor systems? My problem is that the server sockets that are supposed to be created by our servlet and wait for client connections are not being created. We have a RedHat7.3 linux system. When I do a netstat -a | grep by socket connections only some of them show up. Obviously, the client connections for the server sockets that were not created fail with the error message connection refused. Asha Leon Rosenberg wrote: We have tomcat (5.0.x) on both intel xeon and amd two-processor systems, it works (under linux / jdk 1.4). Maybe you should provide more details, but it doesn't sounds like a multiprocessor problem. Regards Leon -Ursprüngliche Nachricht- Von: Asha Nallana [mailto:[EMAIL PROTECTED] Gesendet: Donnerstag, 8. September 2005 23:00 An: tomcat-user@jakarta.apache.org Betreff: Does Tomcat work on dual processor systems? I am having problem with Tomcat running on a dual processor system? Has anyone tried this? Does it work? The server sockets from my application are not being created or accepting connections. I don't know the exact cause. But the symptom is that all client connections are not being refused with the cause Connection Refused. The creation of these server sockets is random. It works 50% of the time. I have tried changing the start up sequence of Tomcat, Apache and my software but still no luck. Thanks. -- Asha Nallana Director - Austin R D Interact Incorporated 9390 Research Blvd. Kaleido II, Suite 100 Austin, TX 78759 (512)502-9969 x 113 [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Asha Nallana Director - Austin R D Interact Incorporated 9390 Research Blvd. Kaleido II, Suite 100 Austin, TX 78759 (512)502-9969 x 113 [EMAIL PROTECTED]
Re: Does Tomcat work on dual processor systems?
Ask yourself these questions: a. Does the web-applications under Tomcat receive all HTTP(S) requests properly? Or are there any issue even for Tomcat's own sockets in 8080 and 8443 (or whatever ports you have configured to) ports? b. If yes (which I think is the case and which verifies that there is nothing wrong with your Tomcat server), can you write a simple Java-based application/service/process that uses your server socket creation code that is present within the web-application and let it run? (If no then the Tomcat server itself having problems opening up or listening to sockets and you will need network analysis tools to find out what is happening on those well-known ports.) c. Now do you observe the same problem? (I think you will) d. Which ports are you using to listen to for your server sockets? If your server has multiple NICs are you making sure that the sockets are being created on the IP you want to? e. Do you have any firewalls or network monitoring applications etc. blocking or controlling those ports? Asha Nallana [EMAIL PROTECTED] 09/08/2005 05:53 PM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject Re: Does Tomcat work on dual processor systems? Yes, my web application is creating 4 server socket instances. Out of these 4 , some of them get created and some don't. The ones created each time differ and so the word random. My application does not use RMI. The server sockets are used to pass data (serialized ofcourse) between the client and our web server. Our webapplication displays real-time data of our servers. Atanu Neogi wrote: So, essentially, your web application is creating server socket instances and listening on them outside the context of Tomcat, right? That is, from your servlet code you are doing something like (new java.net.ServerSocket()).accept() ? Why do you call the ports are random? Is it because your servlet is exporting and registering UnicastRemoteObjects, i.e., also acting as an RMI server? If so, then any issue you are seeing has got nothing to do with Tomcat or processor details but your network configuration? Is yours a multi-home server? Asha Nallana [EMAIL PROTECTED] 09/08/2005 05:13 PM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject Re: Does Tomcat work on dual processor systems? My problem is that the server sockets that are supposed to be created by our servlet and wait for client connections are not being created. We have a RedHat7.3 linux system. When I do a netstat -a | grep by socket connections only some of them show up. Obviously, the client connections for the server sockets that were not created fail with the error message connection refused. Asha Leon Rosenberg wrote: We have tomcat (5.0.x) on both intel xeon and amd two-processor systems, it works (under linux / jdk 1.4). Maybe you should provide more details, but it doesn't sounds like a multiprocessor problem. Regards Leon -Ursprüngliche Nachricht- Von: Asha Nallana [mailto:[EMAIL PROTECTED] Gesendet: Donnerstag, 8. September 2005 23:00 An: tomcat-user@jakarta.apache.org Betreff: Does Tomcat work on dual processor systems? I am having problem with Tomcat running on a dual processor system? Has anyone tried this? Does it work? The server sockets from my application are not being created or accepting connections. I don't know the exact cause. But the symptom is that all client connections are not being refused with the cause Connection Refused. The creation of these server sockets is random. It works 50% of the time. I have tried changing the start up sequence of Tomcat, Apache and my software but still no luck. Thanks. -- Asha Nallana Director - Austin R D Interact Incorporated 9390 Research Blvd. Kaleido II, Suite 100 Austin, TX 78759 (512)502-9969 x 113 [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Asha Nallana Director - Austin R D Interact Incorporated 9390 Research Blvd. Kaleido II, Suite 100 Austin, TX 78759 (512)502-9969 x 113 [EMAIL PROTECTED]
Re: CORRECTION: Can a servlet receive a response to its own request?
Make your servlet act like a java HTTPS client using the java.net.URL, java.net.HttpURLConnection and javax.net.ssl.HttpsURLConnection classes. Read from the response input stream (using java.io. classes) returned by the connection. You will need to write your own hostname verifier and have the target server certificate chain validated in your java certificate store. Michael Mehrle [EMAIL PROTECTED] 05/18/2005 12:01 PM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject CORRECTION: Can a servlet receive a response to its own request? Simple question, but it's driving me nuts. I really don't want to get into the whole web service business - all I need is for a servlet to be the recipient of its own request. Or - in other words - can a servlet act like a web browser - just without the GUI? Use case: - Servlet issues https request to an outside server (via getServletContext().getRequestDispatcher(https://www.someoutsideserver/) ) - Outside server processes request and responds with POST response (also via https). - Servlet [somehow] is able to be the recipient of the response. - Servlet parses the response and stores data to the database. Notes: - The servlet is not the default servlet on that tomcat instance. - Everything happens via https and I expect the outside server will listen on 443 and tomcat on 8443 ANY suggestions would be very helpful - this seems to be a tricky one. TIA, Michael - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: No such list! s (AM I THE ONLY ONE GETTING THIS SPAM)?
We have all been getting it for last couple of days. I added a spam filter on the sender domain. Guy Katz [EMAIL PROTECTED] 05/17/2005 01:46 AM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject RE: No such list! s (AM I THE ONLY ONE GETTING THIS SPAM)? am i the only one getting this annoying spam from the tomcat lisy? -Original Message- From: s [mailto:[EMAIL PROTECTED] Sent: Monday, May 16, 2005 10:32 PM To: tomcat-user@jakarta.apache.org Subject: No such list! s Valid Lists New Atlanta List Server --- There is no list by that name on this server. Available lists are: bluedragon-interest servletexec-interest jturbo-interest - 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]
In-memory session replication without Clustering
Hi, a.What is the best way to share a HttpSession between web applications running on a single Tomcat instance ? That Tomcat instance is not a cluster node and clustering has not been enabled. b. What is the best way to share other java Object information (without using common persistence storage ) in memory between web applications? Are the add-on cache modules like JBoss cache etc. only solution? Regards.
Re: In-memory session replication without Clustering
Will, I am perfectly aware of everything you said. I have been working with Tomcat for last few years. I should have clarified that before. I can do lot of these things using clusters and in-memory session replications. I was looking for some plug-in modules for Tomcat (and not external solutions like JBoss cache and Tangosol) to quickly implement cache sharing between web applications in a single Tomcat instance. I have one of my own based on persistent storage but that is not really efficient. Thanks anyway. Regards. Will Hartung [EMAIL PROTECTED] 05/13/2005 02:27 PM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To Tomcat Users List tomcat-user@jakarta.apache.org cc Subject Re: In-memory session replication without Clustering From: Atanu Neogi [EMAIL PROTECTED] Sent: Friday, May 13, 2005 10:38 AM Hi, a.What is the best way to share a HttpSession between web applications running on a single Tomcat instance ? That Tomcat instance is not a cluster node and clustering has not been enabled. b. What is the best way to share other java Object information (without using common persistence storage ) in memory between web applications? Are the add-on cache modules like JBoss cache etc. only solution? The problem is that the webapps have their own distinct classloader hierarchies, so that's one thing that makes sharing objects across webapps difficult. Recall that an objects Class is based not just on the actual Class it uses, but the Classloader for the class as well. Thus if you have the an object of ClassX that's loaded by the classloader for WebappA, and another object of ClassX loaded by WebappB, and in WebappA you try: ClassX myObject = (ClassX)getObjectFromWebappB(); That will fail with a class cast exception, because WebappA.ClassX != WebappB.ClassX. Using a clustering style caching solution helps remedy this by serializing the objects, which breaks a lot of those dependencies, but is obviously expensive. One thing you can do, however, is move any classes that you want to share across webapps out into the common/lib or common/classes directories. Those classes are all shared across webapps, so they can safely be used back and forth between them, since they share the Common classloader. As for sharing HttpSessions, I don't think you can do that directly, as each webapp will have their own unique session. You'll need to have some other means to identify the user outside of the sessionid (like, say, their login name if they authenticate, or an arbitrary domain level cookie that you create on the fly if it doesn't exist yet). Then you use that credential to access shared information stored in a Cache that's loaded from the Common classloader. Regards, Will Hartung ([EMAIL PROTECTED]) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Interface to admin manager web application
Thanks, but that of course is obvious and I have mentioned the same. I was looking for the definition of the URIs for direct HTTP and/or JMX query calls, i.e., a client interface to the admin and manager web applications. Most of it I could reconstruct by reading the URLs submitted from the default browser GUIs for these applications but was wondering if there exists a reliable document listing them. Raghupathy,Gurumoorthy [EMAIL PROTECTED] 04/29/2005 04:11 AM Please respond to Tomcat Users List tomcat-user@jakarta.apache.org To 'Tomcat Users List' tomcat-user@jakarta.apache.org cc Subject RE: Interface to admin manager web application Well you can use a httpurlConnection ? In your java code to do the work Regards Guru -Original Message- From: Atanu Neogi [mailto:[EMAIL PROTECTED] Sent: 29 April 2005 00:42 To: Tomcat Users List Subject: Interface to admin manager web application Hi, I need to write a non-browser GUI application to do the same set of actions currently performed by the HTML interface of the Tomcat manager and admin web applications. I looked at whatever documentation is currently avialable for JMX proxy servlet. Before I delve into the Tomcat source code to figure out the calls myself, I would request if anyone has a. a comprehensive list of JMX query commands to do all the actions that can be done via admin or manager and/or b. the list of corresponding HTTP GET or POST interfaces (the ones used by the browser GUI for admin or manager) to kindly forward me the same. Thanks a lot for your help. Regards. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Interface to admin manager web application
Hi, I need to write a non-browser GUI application to do the same set of actions currently performed by the HTML interface of the Tomcat manager and admin web applications. I looked at whatever documentation is currently avialable for JMX proxy servlet. Before I delve into the Tomcat source code to figure out the calls myself, I would request if anyone has a. a comprehensive list of JMX query commands to do all the actions that can be done via admin or manager and/or b. the list of corresponding HTTP GET or POST interfaces (the ones used by the browser GUI for admin or manager) to kindly forward me the same. Thanks a lot for your help. Regards.
