MOD_JK (Apache+Tomcat)
Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM _ Get reliable dial-up Internet access now with our limited-time introductory offer. http://join.msn.com/?page=dept/dialup - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
MOD_JK (Apache+Tomcat)
Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM
mod_jk (Apache + Tomcat)
I have configured apache 2.0.47 + tomcat 4.1.27 with mod_jk 2.0.2 on a Red Hat 6.2 distribution. It seems to work fine but in the error_log file I obtain the following message: [error] mod_jk child init 1 0 I dont know what is the problem. Thanks
Re: MOD_JK (Apache+Tomcat)
Hari: You're trying to do too much too soon. Get the Apache -> Tomcat connection through mod_jk to work before you try to get your own webapp to work. Use the Tomcat example servlets to verify that mod_jk is correctly installed and functional. If you can run the servlets through Apache (without :8080 in the URL) then you know mod_jk is okay, and you can focus exclusively on your webapp. Webapp deployment and mod_jk are both complicated enough on their own without trying to mix the issues together. Jerry Hari Om wrote: Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM _ Get reliable dial-up Internet access now with our limited-time introductory offer. http://join.msn.com/?page=dept/dialup - 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]
Re: MOD_JK (Apache+Tomcat)
Thanks Jerry, My Apache and Tomcat are working independently.ie when I run http://my.domain.name:8080/kuki or http://my.domain.name:8080/examples ...it works just great problem only occurs when I use connector MOD_JK. Any related informaiton is appreciated.. HARI OM Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM _ Make your home warm and cozy this winter with tips from MSN House & Home. http://special.msn.com/home/warmhome.armx - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: MOD_JK (Apache+Tomcat)
any update on this? - Original Message - From: "HARI OM" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, December 30, 2003 10:16 AM Subject: MOD_JK (Apache+Tomcat) Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: MOD_JK (Apache+Tomcat)
Here's how I did it: http://www.katzenjammer.us/~jford/apache/tomcat/connectors/mod_jk_setup.shtml Not exactly your setup (I use Apache 1.3.27 and Red Hat 9.0) but maybe it will help. Jerry HARI OM wrote: any update on this? - Original Message - From: "HARI OM" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, December 30, 2003 10:16 AM Subject: MOD_JK (Apache+Tomcat) Hello, I am using APache 2.0.47 and Tomcat 4.1.27 on SuSE Linux 8.1 I am working on the Connector MOD_JK.SO which I build from the source and put in /modules directory. When I run my Tomcat first and then Apache and then acceess http://My.domian.name/kuki it does not work... it says "Page cannot be found" wonder why? I also try to see MOD_JK.LOG file but I cannot find this file anywhere. Can anyone help me out in connecting Apache and Tomncat. Here are my Config Files: --- SERVER.XML --- # added following after ~~~ --- WORKERS.PROPERTIES --- workers.CATALINA_HOME=/usr/local/tomcat4 workers.java_home=$(JAVA_HOME) ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.name worker.ajp13.type=ajp13 worker.ajp13.lbfactor=5 ~~~ --- MOD_JK.CONF --- ## Auto generated on Mon Dec 29 14:10:45 MST 2003## LoadModule jk_module /usr/local/apache2/modules/mod_jk.so JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/tomcat4/logs/mod_jk.log" JkLogLevel info ServerName my.domain.name JkMount /kuki ajp13 JkMount /kuki/* ajp13 JkMount /examples ajp13 JkMount /examples/* ajp13 ~~~ HTTPD.CONF Listen My.IP.ADDR.ESS:80 LoadModule jk_module modules/mod_jk.so ServerName my.domain.name:80 JkWorkersFile "/usr/local/tomcat4/conf/jk/workers.properties" JkLogFile "/usr/local/apache2/logs/mod_jk.log" JkLogLevel debug JkMount /examples ajp13 JkMount /examples/* ajp13 JkMount /kuki ajp13 JkMount /kuki/* ajp13 ~~~ Can anyone please GUIDE me on this Connection Process? THANKS! and HAPPY NEW YEAR! HARI OM - 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]
mod_jk (Apache-Tomcat) problem
Hi, I'm new to this list and hoping someone can help with the following problem. We have a JBoss (3.2.1) install w/embedded Tomcat (4.1.24) fronted by Apache 1.3.27 running on Solaris. The problem: mod_jk is setting the "Content-Length" header value to 0 for "Content-Type" of text/html when an HTML document is requested from our docdownload servlet. Other text/html content is delivered w/o a problem. Behavior is same whether or not we set the "Content-Length" header in our servlet code. From apache/logs/jk2.log: [Tue Oct 21 18:50:29 2003] ( info) [mod_jk2.c (465)]: mod_jk.translate(): uriMa p /courseweb-qa/util/docdownload/2003/Fa/COM+LIT/R1A/001/ lb:lb [Tue Oct 21 18:50:29 2003] ( info) [mod_jk2.c (362)]: mod_jk.handler() per dir worker for 0x1b34f8 0x198d98 [Tue Oct 21 18:50:29 2003] ( info) [mod_jk2.c (405)]: modjk.handler() Calling l b:lb 0x198d98 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (110)]: service.head( ) 200 2 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (119)]: service.head( ) Content-Type: text/html 0 2 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (119)]: service.head( ) Content-Length: 0 1 2 < 0, should be 9408 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (243)]: service.write () 4096 (4096) out of 8184 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (243)]: service.write () 4088 (4088) out of 4088 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (243)]: service.write () 8 (8) out of 8 [Tue Oct 21 18:50:29 2003] ( info) [jk_service_apache13.c (243)]: service.write () 1216 (1216) out of 1216 Any solutions, suggestions, pointers will be most appreciated. Thanks, Robert - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
mod_jk, apache, tomcat and solaris 8
Hi We are having problems with load balancing of apache and tomcat on solaris. We have 4 solaris servers, 2 with apache 2.0.45 installed and 2 with Tomcat 4.1.24. We are using mod_jk on the apache servers to connect to the two tom cat servers and get them to load balance and failover, the idea being that 1 of the apache machines and 1 of the tomcat machines can fail and the system will keep running. Everything is configured and running and load balancing works well across the platforms, however, if we simulate a failure of one of the tomcat servers (by disconnecting the network cable to make it disappear), the apache server which is currently connected to the "failed" server does not fail over to the other tomcat server. Note 1: if we shut down either tomcat server (using shutdown.sh) then the apache server correctly fails over to the other tomcat server. Note 2: we tried the same thing on a MS Windows platform, and the failover worked (albeit there was a 60 second delay in the fail over happening). Here are the relevant (in our opinion) bits of our config files *** httpd.conf relevant section LoadModule jk_module modules/mod_jk-2.0.43.so JkWorkersFile /usr/local/apache2/conf/workers.properties JkLogFile /usr/local/apache2/logs/mod_jk.log JkLogLevel debug JkMount /*.jsp loadbalancer JkMount /servlet/* loadbalancer JkMount /* loadbalancer *** workers.properties relevant section worker.list=loadbalancer worker.tc1.port=8009 worker.tc1.host=192.168.0.6 worker.tc1.type=ajp13 worker.tc1.cachesize=10 worker.tc1.cache_timeout=10 worker.tc1.socket_timeout=10 worker.tc1.lbfactor=1 worker.tc1.socket_keepalive=0 worker.tc2.port=8009 worker.tc2.host=192.168.0.122 worker.tc2.type=ajp13 worker.tc2.cachesize=10 worker.tc2.cache_timeout=10 worker.tc2.socket_timeout=10 worker.tc2.lbfactor=1 worker.tc2.socket_keepalive=0 worker.loadbalancer.type=lb worker.loadbalancer.balanced_workers=tc1,tc2 worker.loadbalancer.sticky_session=0 We've been baffled by this for a few days now, so if anyones got any ideas we would really appreciate some help. Regards John Sheehan Cyantel www.cyantel.com --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.488 / Virus Database: 287 - Release Date: 05/06/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
mod_jk Apache-Tomcat. how to execute jsp?
Hi All, I am using siteminder Apache reverse proxy which has a proxy engine running on tomcat. I am facing a problem with executing a JSP/Servlet on this combination. Here when I start my reverse proxy it itself start the engine as well as the proxy. I have made following changes in httpsd.conf file LoadModule jk_module "/tomcat3.2/platform/win32-x86/mod_jk.so" AddModule mod_jk.c JkMount /*.jsp ajp13 JkMount /servlet/* ajp13 Include "\conf\mod_jk.conf-auto" In the Apache httpsd.access.log I get error 10.5.10.12 - - [14/Sep/2003:13:01:03 +0400] "GET /siteminderagent/Test.jsp HTTP/1.1" 200 422 in the Tomcat mod_jk.log I get error [jk_ajp13_worker.c (325)]: Error ajp13_process_callback - write failed [jk_uri_worker_map.c (335)]: jk_uri_worker_map_t::uri_worker_map_close, NULL parameter [jk_uri_worker_map.c (185)]: In jk_uri_worker_map_t::uri_worker_map_free, NULL parameters I am not able to execute the jsp/servlet. can anybody help me on this. Thanks & Rgds, Rakesh _ Access Hotmail from your mobile now. http://server1.msn.co.in/sp03/mobilesms/ Click here. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Number of processes and relationship to mod_jk, Apache, tomcat
I am trying to understand the relationship between applications in Tomcat, the number of Tomcat processes, Apache mod_jk and the number of threads. For instance on a system I have the following Apache 1.3.28, Tomcat 4.1.27, Java 1.4.2_02 I use the follow commands to see what is listening to different ports to get an idea of what process or threads are running. Apache: lsof -i tcp:80 | wc -l This gives me 12 processes listening to port 80 (I checked these are related to the number of Apache instances) Tomcat direct port: lsof -i tcp:8080 | wc -l This gives me 50 process that also correspond to the number of tomcat instances running(i.e. the number of java instances I see in ps ) Tomcat mod_jk port: lsof -i tcp:8009 | wc -l gives me 550 I have included my condensed jk.properties and workers.properties files at the end if that may help. Now I now that these numbers will change depending on load but I am trying to understand the relationship. So my questions is how do the numbers relate to each other? How does this effect performance? How could I tune these numbers? Now I have a vague understanding of how these relate but the numbers don't add up for me. I have read the docs and searched for quite a while for a better description. Thanks FILE: jk.properties ### LoadModule jk_module libexec/mod_jk.so JkWorkersFile /usr/local/tomcat/conf/workers.properties JkLogFile /usr/local/tomcat/logs/mod_jk.log JkLogLevel info JkLogStampFormat "[%a %b %d %H:%M:%S %Y] " JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories JkRequestLogFormat "%w %V %U %T %b" ## /examples1 Alias /examples1 /usr/local/tomcat/webapps/examples1 AllowOverride None deny from all JkMount /examples1/* worker1 ## /ctrials Alias /ctrials /usr/local/tomcat/webapps/ctrials AllowOverride None deny from all JkMount /ctrials/* worker1 ## /syndication Alias /syndication /usr/local/tomcat/webapps/syndication AllowOverride None deny from all JkMount /syndication/* worker1 ## /fellowship Alias /fellowship /usr/local/tomcat/webapps/fellowship AllowOverride None deny from all JkMount /fellowship/* worker1 ## /test Alias /test /usr/local/tomcat/webapps/test AllowOverride None deny from all JkMount /test/* worker1 # All jsp go to worker1 JkMount /*.jsp worker1 # All servlets goes to worker1 JkMount /*/servlet/ worker1 ## FILE: workers.properties ## # Define some properties workers.apache_log=/usr/local/apache/logs/ workers.tomcat_home=/usr/local/tomcat workers.java_home=/usr/local/java/ ps=/ # Define workers worker.list=worker1 worker.worker1.type=ajp13 worker.worker1.host=localhost worker.worker1.port=8009 worker.worker1.lbfactor=1 #worker.worker1.cachesize=10 #worker.worker1.cache_timeout=300 worker.worker1.socket_keepalive=1 worker.worker1.socket_timeout=300 # how many ms to wait for PONG after sending a PING for connection worker.worker1.connect_timeout=2000 # how many ms to wait for PONG after sending a PING before posting data worker.worker1.prepost_timeout=2000 # how long to wait for a reply after sending data before server considers connection dead worker.worker1.reply_timeout=180 ## - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Number of processes and relationship to mod_jk, Apache, tomcat
Andrew, I am trying to understand the relationship between applications in Tomcat, the number of Tomcat processes, Apache mod_jk and the number of threads. Apache: lsof -i tcp:80 | wc -l This gives me 12 processes listening to port 80 (I checked these are related to the number of Apache instances) You should be able to predict this from the httpd.conf file. Do the numbers add up for Apache? Tomcat direct port: lsof -i tcp:8080 | wc -l This gives me 50 process that also correspond to the number of tomcat instances running(i.e. the number of java instances I see in ps ) What UNIX flavor are you running? I know that in old versions of Linux, each pthread was shown as a separate process. Thus, it looked like many processes (really threads) all held the same resource. For example, they all had the same resident memory footprint (because the memory is shared) and they all were bound to the same ports. In the later versions (mine being one of them, I've got kernel 2.4.20), they only show up as one process. Thus, I get this output: [EMAIL PROTECTED] ]# /usr/sbin/lsof -i tcp:8009 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME java9313 tomcat 15u IPv4 69785 TCP *:8009 (LISTEN) [EMAIL PROTECTED] ]# I'm guessing that you're getting multiple lines that all look like this. Is this accurate? Only one process can bind to a port at any given time, so multiple processes (even with separate pids) might appear to be bound to that port. Tomcat mod_jk port: lsof -i tcp:8009 | wc -l gives me 550 Again, see the discussion of the threads/processes above. Also note that you may have many more threads that you thought you would. I recall that each (non-"nio") stream in Java requires a separate thread, so System.in, System.out, and System.err already give you three threads. Then, you've got the main thread, plus the thread pool to serve requests from remote clients. That may be large, although having that number higher than your Apache request processor limit is probably a waste. Now I know that these numbers will change depending on load but I am trying to understand the relationship. Well, some numbers should not change. For example, there should be a hard limit on the number of Apache threads/processes running. You can tune that in httpd.conf. For the Java process, it's harder to predict because of the way the VM retires threads and when your server is creating them. Ideally, new threads wouldn't be created at all because there would be a closed thread pool (unless you have a min and max thread pool size and the number of threads depends on load). So my questions is how do the numbers relate to each other? The number of Apache processes is usually completely unrelated to the java process counts (except that there will be more java threads than Apache processes :). How does this effect performance? Most of the "processes" are very lightweight. Apache is a lean, mean, web-serving machine so don't worry about that. What you should worry about is if your thread count continually goes up and never comes back down. You'd have a nasty resource leak, then. If you avoid creating your own threads in your web application (which you should be avoiding anyway), you're generally okay. -chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
mod_jk/apache + tomcat 3.2.1 keep connections open after Browser closes
Hi, we are writing a chat application that uses a continous stream of data via a JspWriter to the browser. To detect if a client closes the connection by killing her Browserwindow we catch the IOexception thrown if a JspWriter.flush() method fails due to a loss of connection. Now this works perfectly fine when talking directly to Tomcat via its Http connector. But when we use Apache & mod_jk as intermediary between Browser and Tomcat a strange phenomenom happens: mod_jk works fine and honours the flush method of the jspWriter by sending the data directly, without buffering. When the client closes the connection (by closing/killing Browser window) the JspWriter method does not throw an IOException but sends the data unhindered to apache and mod_jk. Apache meanwhile is unable to totally close the TCP connection on its side to the client and stays forever in the CLOSE state (seen via netstat) but still accepts all the data send from Tomcat. We tried sending many kilobytes from Tomcat but have not seen that any buffer ooff apache or mod_jk would keep the data. It just goes nowhere!? Has anbody seen something similar? Or in a more generic way "How does mod_jk handle a closed connection from the Browserside if Tomcat is still sending data and would do so potentially forever (like in this Chat Situation/where all data is send over a continous stream)?" Could it be that mod_jk always waits till the end of data send from Tomcat util it acknowledges the closed connection from the client? Sorry if this problem is described somewhat confusingly, I hope someone gets the general idea and would be willing to clarify anything necessary to describe the problem. Thanks, Mario Oschwald - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
