tuning tomcat for push applications

Hi Folks Past couple of months i was working to make tomcat perform with a "push" application. I have posted the results of our effort @ http://rjha94.blogspot.com/ I would welcome your comments and suggestions Thanks - Rajeev. -

Best practices : browser checks by tomcat container

Hi Right now our application supports only new set of browsers (firefox and IE 6+) so we need to display a custom Unsupported Browser page when user hits a servlet via apache front-end URL . The way we are planning to do this is 1) set environment variables in apache based on browser match ru

passing Multiple JkEnvVars

Hi How do i pass multiple environment variables from apache to tomcat on mod_jk connector. All the documents say to put this in httpd.conf JkEnvVar ENV_VAR_NAME and read this as a request attribute in servlet engine. But this gives you ability to pass only one env variable. [ Actually we a

Re: Tomcat 5.0.28, Socket hanging on sending 20KB data for 16 minutes

looking at http://www.jfree.org/jfreechart/javadoc/ , org.jfree.chart.encoders.EncoderUtil.writeBufferedImage does not look thread-safe. try checking sun.awt.image.codec.JPEGImageEncoderImpl.encode API. Try increasing the latency by re-requesting the servlet every 30 secs/ 1 min and see if tha

Re: tomcat response slow

what does the logs say? turn debug on and check the logs. Also see if the DB URL, user password etc are correct. And I dont think people will like your posting image blobs in mail. Thanks - Rajeev. Patil, Sheetal wrote: Hello all I am using tomcat 5.0 for my application. My application in cre

Re: Reloadable context

No idea on what you are missing. you try reloading the application from tomcat manager application. that works for me. Atleast you save the restart trouble. Akoulov, Alexandre [SB] wrote: Hi , So I've got to restart tomcat to get my change deployed. Any idea on what I am missing? -

Re: Max. Concurrent User for Tomcat

application could be doing lot of heavy-duty data processing/storage. - Rajeev Jha tcUser wrote: Hi, does anyone know what is the max. number of concurrent users for Tomcat? I have been searching for this information but can't really find an exact answer. Can anyone help? Thanks. -- View

Re: Arabic Support on tomcat 5.0.28

This should not be a big issue. Lets say we submit some arabic data through a form and then re-display it To submit correct data 1) HTMl page should be 2) when you receive the data , do a request.setContentEncoding() before getting string data from request To display 3) set the response conten

Re: about maxProcessors attribute

ust queued. and for established sockets [EMAIL PROTECTED] async]$ netstat -a -n|grep -E "^(tcp)"| cut -c 68- | grep ESTABLISHED | wc -l 2228 F) conclusion ? am i missing something ? Thanks Rajeev Jha. Bill Barker wrote: Since MaxClients is so big, I'm assuming that you have a p

Re: i want to know load on Tomcat

No clue if the manager application is available with 4.x. i have 5.5.x. maybe a reason to update ? if you are running your tomcat with jdk1.5 , you can enable JMX and see the number of active threads in JVM. balaraju mandala wrote: Hi Tang and Rajeev, Thank You very much for u r reply. Raje

Re: i want to know load on Tomcat

Your config (or Environment ;o) will fix the number of maximum simultaneous clients. Tomcat manager application has a server status link. you can use that or you can start catalina with JMX support and see number of active threads! balaraju mandala wrote: Dear Comunity, I want to know how

Re: jk can't connect to tomcat

set JK log level to debug. That may help trace the problem. fooshyn wrote: Your settings seems ok to me (or maybe I missed out something). Could it be the application inside Tomcat that caused this to happen? Does Tomcat's Catalina log contain any error which might caused Tomcat to hang? And

Re: UnsatisfiedLinkError when loading DLL twice

if the DLL in windows system 32 then it should be picked right up. have you registered this DLL or not ? if not then try registering this dll first. --- "Ho, Sam" <[EMAIL PROTECTED]> wrote: Hi, All My servlet use a DLL, currently the DLL is located at window system32 and in the webapp's W

Re: Rephrased: Maximum number of simultaneous HTTP connections

TP If the thread servicing your request blocks, the browser will not quit. The browser would wait the min( browser time-out ,response stream is closed). this is the trick many people use. doGet(request, response){ out = response.getOutputStream(); // when you write something out.write(by

Re: Rephrased: Maximum number of simultaneous HTTP connections

I think everybody on the list here agrees that http is not the right sort of thing for a chat application. And most of the IM/chat applications do not run on http anyway. opening the sockets directly for such an application is better/easier any day. However, people do demand an HTTP

Re: Rephrased: Maximum number of simultaneous HTTP connections

Remy Maucherat wrote: Yes, but you need the 5000 or so threads to do this, and there's no workaround. So it is the real problem since it forces you to use polling. How about bypassing the servlets alltogether? we can take any exisitng http/ajp13 connector code and replace the servlet con

Re: Rephrased: Maximum number of simultaneous HTTP connections

Remy Maucherat wrote: On 4/3/06, Rajeev Jha <[EMAIL PROTECTED]> wrote: Tp wrote: And there seems to be no workaround, because the connection will close after the doGet() and doPost() method finishes (is that actually true?). So, the only way to keep 3000 simultaneous connections

Re: Rephrased: Maximum number of simultaneous HTTP connections

Tp wrote: And there seems to be no workaround, because the connection will close after the doGet() and doPost() method finishes (is that actually true?). So, the only way to keep 3000 simultaneous connections is to keep 3000 of those methods from returning, wehich means keeping 3000 thread

Re: Maximum number of simultaneous HTTP Requests / Performance

NBIO will not help very much ;o) we are running such an application and want to migrate to apache/tomcat. The issue is, all the optimizations you hear about are done from the request's side which is of not much use in this case. The limiting factor would be * how many connections can you open

Re: Supporting maximum number of keep-alive connections

On 3/22/06, Remy Maucherat <[EMAIL PROTECTED]> wrote: > On 3/22/06, Rajeev Jha <[EMAIL PROTECTED]> wrote: > > In our case,the servlet is interfacing to the back-end that sends > > async events from time to time. > > As you may have noticed, the HTTP protoco

maximum number of threads for tomcat

Hi We are desiging a push application to run with tomcat. Our servlet interfaces to a backend and listens for async events, when the events arrive,data is pushed to the browser. Browser opens a keep-alive connection and shows the data received from servlet. The doGet() method is like this doGet(

Supporting maximum number of keep-alive connections

> On 3/17/06, Rajeev Jha <[EMAIL PROTECTED]> wrote: > > > What's your ratio of Apache to Tomcat instances? You may want to look > into using squid as a reverse proxy to Tomcat, it is very good at > supporting a huge number of concurrent clients without having to sp

Supporting maximum number of keep-alive connections

Hi I would like to try out tomcat for new my application. I have used tomcat for quite some time, but the nature of new application is very different from the traditional request-response model. We want to build an application that supports about 1024 keep-alive connections per machine.(2 GB, x86