Re: why use mod_jk?
Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: why use mod_jk?
Brad O'Hearne wrote: After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, Faster up to 50% over mod_proxy by using constant connection pool. Uses AJP protocol (binary HTTP) Load balancing Graceful shutdown of nodes in the cluster Hot standby Domain model clustering if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? In-process integration is bad idea because most modern web servers offer so called master-child mechanism, where the master process monitors the child and recycles it in case of error. If you put JVM inside web server process address space then you'll be not able to have load balancing and multiple backend servers, and if some cgi script kills your web server child process, it will kill your application server as well. Apache is using multiple child processes for serving requests, and that would mean that you would need that many JVM instances. Prefork mpm or Apache 1.3 creates a separate process for each client connection, so for 100 concurrent client connections you would end up with 100 JVM instances. That's the reason why JNI was usable only on Windows or Netware which mpm's have a single child process. Even on those, things like MaxRequestsPerChild 1 would try to kill the Tomcat after each 1000 requests. Since it would try to start a new instance befor killing the old one, you'll end up in server crash. So, totally unusable. Having process separation between web and application server rises both stability and overall security. Regards, Mladen. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: why use mod_jk?
mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - 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: why use mod_jk?
Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Nope, since it all under the Httpd project :). You can start with: http://httpd.apache.org/docs/2.2/mod/mod_proxy.html, and then move on to http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html. The simplest configuration looks like: ProxyPass /myapp ajp://localhost:8009/myapp Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - 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: why use mod_jk?
If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: why use mod_jk?
Jess, Thanks for the reply. Responses below: On Feb 24, 2006, at 6:51 AM, Jess Holle wrote: If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. None of the configuration steps in and of itself are difficult. Building mod_jk is not difficult. Editing configuration files is not difficult. Its after you've put it all together, exactly as noted on a hodge-podge of Googled URLs, and it doesn't work, and one cryptic line in a log file, and the right connections not being made between apache and tomcat, which send you into hours of trial and error. With regards to your comments above, I didn't tangle with load balancing at all, and apache and tomcat reside on the same box, no firewall between them. Yes, you'd think this would be simple. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? Thanks for your help. Brad -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news: [EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - 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] - 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]
Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?)
I suppose this question deserved its own thread. Before I spend any more time trying to get this configured, I would like to know what is the best way to proceed: mod_jk or mod_proxy_ajp? Thanks, Brad On Feb 24, 2006, at 7:49 AM, Brad O'Hearne wrote: Jess, Thanks for the reply. Responses below: On Feb 24, 2006, at 6:51 AM, Jess Holle wrote: If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. None of the configuration steps in and of itself are difficult. Building mod_jk is not difficult. Editing configuration files is not difficult. Its after you've put it all together, exactly as noted on a hodge-podge of Googled URLs, and it doesn't work, and one cryptic line in a log file, and the right connections not being made between apache and tomcat, which send you into hours of trial and error. With regards to your comments above, I didn't tangle with load balancing at all, and apache and tomcat reside on the same box, no firewall between them. Yes, you'd think this would be simple. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? Thanks for your help. Brad -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news: [EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad --- -- 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] - 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?)
That depends if you want to use Apache 2.0.x, Apache 2.2.x, or some other web server (i.e. IIS). If you're planning on using Apache 2.2.x, mod_proxy_ajp is the way to go. For anything else, mod_jk is the way to go. , Josh. -Original Message- From: Brad O'Hearne [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 9:02 AM To: Tomcat Users List Subject: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?) I suppose this question deserved its own thread. Before I spend any more time trying to get this configured, I would like to know what is the best way to proceed: mod_jk or mod_proxy_ajp? Thanks, Brad On Feb 24, 2006, at 7:49 AM, Brad O'Hearne wrote: Jess, Thanks for the reply. Responses below: On Feb 24, 2006, at 6:51 AM, Jess Holle wrote: If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. None of the configuration steps in and of itself are difficult. Building mod_jk is not difficult. Editing configuration files is not difficult. Its after you've put it all together, exactly as noted on a hodge-podge of Googled URLs, and it doesn't work, and one cryptic line in a log file, and the right connections not being made between apache and tomcat, which send you into hours of trial and error. With regards to your comments above, I didn't tangle with load balancing at all, and apache and tomcat reside on the same box, no firewall between them. Yes, you'd think this would be simple. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? Thanks for your help. Brad -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news: [EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad --- -- 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] - 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: why use mod_jk?
Question below: On Feb 24, 2006, at 2:05 AM, Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Nope, since it all under the Httpd project :). You can start with: http://httpd.apache.org/docs/2.2/mod/mod_proxy.html, and then move on to http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html. The simplest configuration looks like: ProxyPass /myapp ajp://localhost:8009/myapp Ok, I understand what it is trying to do here. But I assume there is a connector that has to be loaded in Tomcat to enable listening for the ajp protocol on port 8009, no? Is there documentation about this anywhere? Brad Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in- process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad - 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?)
Josh, Thanks a lot for your answer. I am using Apache 2.2.x. Now onto my next question. Bill Barker suggested the httpd.conf / mod_proxy_ajp directive side of the equation. Doesn't there have to be a connector in tomcat's server.xml which will allow listening for the ajp protocol? Is there documentation on this somewhere? Brad On Feb 24, 2006, at 8:07 AM, Fenlason, Josh wrote: That depends if you want to use Apache 2.0.x, Apache 2.2.x, or some other web server (i.e. IIS). If you're planning on using Apache 2.2.x, mod_proxy_ajp is the way to go. For anything else, mod_jk is the way to go. , Josh. -Original Message- From: Brad O'Hearne [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 9:02 AM To: Tomcat Users List Subject: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?) I suppose this question deserved its own thread. Before I spend any more time trying to get this configured, I would like to know what is the best way to proceed: mod_jk or mod_proxy_ajp? Thanks, Brad On Feb 24, 2006, at 7:49 AM, Brad O'Hearne wrote: Jess, Thanks for the reply. Responses below: On Feb 24, 2006, at 6:51 AM, Jess Holle wrote: If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. None of the configuration steps in and of itself are difficult. Building mod_jk is not difficult. Editing configuration files is not difficult. Its after you've put it all together, exactly as noted on a hodge-podge of Googled URLs, and it doesn't work, and one cryptic line in a log file, and the right connections not being made between apache and tomcat, which send you into hours of trial and error. With regards to your comments above, I didn't tangle with load balancing at all, and apache and tomcat reside on the same box, no firewall between them. Yes, you'd think this would be simple. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? Thanks for your help. Brad -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news: [EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2+, and mod_jk is expected to move to supporting IIS/SunOne only (and, the later only if somebody steps up with interest :). Brad --- -- 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED
Re: why use mod_jk?
Brad O'Hearne wrote: I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? mod_proxy_ajp is only for Apache 2.2 and higher. We're still in the process of moving to 2.2. 2.2.0 seems good, though, so you could jump right to it if you don't have other issues. -- Jess Holle - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: why use mod_jk?
Brad O'Hearne wrote: Ok, I understand what it is trying to do here. But I assume there is a connector that has to be loaded in Tomcat to enable listening for the ajp protocol on port 8009, no? Is there documentation about this anywhere? From Tomcat's side of the connection there is no difference to speak of between mod_proxy_ajp and mod_jk. -- Jess Holle - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?)
The following connector exists in the Tomcat 5.5.15 OOTB server.xml. !-- Define an AJP 1.3 Connector on port 8009 -- Connector port=8009 enableLookups=false redirectPort=8443 protocol=AJP/1.3 / I think that is all you need on the Tomcat side. , Josh. -Original Message- From: Brad O'Hearne [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 9:14 AM To: Tomcat Users List Subject: Re: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?) Josh, Thanks a lot for your answer. I am using Apache 2.2.x. Now onto my next question. Bill Barker suggested the httpd.conf / mod_proxy_ajp directive side of the equation. Doesn't there have to be a connector in tomcat's server.xml which will allow listening for the ajp protocol? Is there documentation on this somewhere? Brad On Feb 24, 2006, at 8:07 AM, Fenlason, Josh wrote: That depends if you want to use Apache 2.0.x, Apache 2.2.x, or some other web server (i.e. IIS). If you're planning on using Apache 2.2.x, mod_proxy_ajp is the way to go. For anything else, mod_jk is the way to go. , Josh. -Original Message- From: Brad O'Hearne [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 9:02 AM To: Tomcat Users List Subject: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?) I suppose this question deserved its own thread. Before I spend any more time trying to get this configured, I would like to know what is the best way to proceed: mod_jk or mod_proxy_ajp? Thanks, Brad On Feb 24, 2006, at 7:49 AM, Brad O'Hearne wrote: Jess, Thanks for the reply. Responses below: On Feb 24, 2006, at 6:51 AM, Jess Holle wrote: If you're using Apache 1.3.x or 2.0.x, mod_jk is pretty simple overall. No, you don't want to even try in-process stuff and, yes, if you have a firewall in between Apache and Tomcat that drops idle connections you should read carefully (this is covered by the docs). The only big complaint I have is that the mod_jk docs don't make it terribly clear (or didn't last I checked) exactly how to set jvmRoute in Tomcat and how extraordinarily critical this is when doing load balancing. The Tomcat docs don't make this terribly clear either -- apart from a comment in server.xml. Most everyone I know who tries mod_jk load balancing gets hung up on this one point unless/until I give them a detailed explanation. Apart from the lack of clear/obvious information on this in the mod_jk docs (which should include it considering most folk won't think to check both mod_jk and Tomcat docs), this is actually very simple as well, though. None of the configuration steps in and of itself are difficult. Building mod_jk is not difficult. Editing configuration files is not difficult. Its after you've put it all together, exactly as noted on a hodge-podge of Googled URLs, and it doesn't work, and one cryptic line in a log file, and the right connections not being made between apache and tomcat, which send you into hours of trial and error. With regards to your comments above, I didn't tangle with load balancing at all, and apache and tomcat reside on the same box, no firewall between them. Yes, you'd think this would be simple. I am looking forward to mod_proxy_ajp as it is supposed be a tiny bit faster. You say you are looking forward to mod_proxy_ajp -- does this mean its not available yet, or you just aren't using it yet? While I am glad to learn now of mod_proxy_ajp, I guess this kind of adds to my frustration a bit -- what is the way to go now and why: mod_proxy_ajp or mod_jk? Thanks for your help. Brad -- Jess Holle Brad O'Hearne wrote: mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Brad Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news: [EMAIL PROTECTED] After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Actually, in-process with mod_jk is only supported (and, I use the term lightly :) for TC 3.3.x. For any higher versions it doesn't work at all. You've managed to grasp the deep, dark plan of the Tomcat developers: It is expected that people will migrate to mod_proxy_ajp with Httpd 2.2
Re: Which direction: mod_jk or mod_proxy_ajp? (was: why use mod_jk?)
* Brad O'Hearne wrote (24/02/06 15:14): Josh, Thanks a lot for your answer. I am using Apache 2.2.x. Now onto my next question. Bill Barker suggested the httpd.conf / mod_proxy_ajp directive side of the equation. Doesn't there have to be a connector in tomcat's server.xml which will allow listening for the ajp protocol? Is there documentation on this somewhere? http://tomcat.apache.org/tomcat-5.5-doc/config/ajp.html In fact, the http://tomcat.apache.org/tomcat-5.5-doc/config/index.html page is a good place to go for a lot of things. I generally find tomcat documentation hard to read and hard to understand (I find httpd.conf much more to my taste), but it's generally possible to get there in the end, and better than following half-baked how-tos. The server.xml that ships with tomcat has an ajp connector by default, I think. By the way, I had a very similar battle getting mod_jk going, except that once I found that mod_proxy_ajp only worked in a version of apache I wasn't using, and that mod_jk2 was obsolete (whereas mod_jk wasn't), and I made the choice of mod_jk, setting it up wasn't actually too bad. However, I've found that a large POST to a web page through mod_jk can get mangled (and the mod_jk debug log simply doesn't show chunks of it), whereas direct to tomcat works fine. So I slightly mistrust ajp. There's not much documentation on the protocol, and what exists suggests that not very many people in the world really know what's going on with it. Chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: why use mod_jk?
On Feb 24, 2006, at 10:11 AM, Brad O'Hearne wrote: Question below: On Feb 24, 2006, at 2:05 AM, Bill Barker wrote: Brad O'Hearne [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] mod_proxy_ajp? Yet another twist. Its just hard for me to believe that how do I integrate tomcat and apache httpd? is such a mystery / unknown. This seems like it would be question #1 on any Tomcat FAQ. So where can I found out more about mod_proxy_ajp. Is there a Tomcat resource which explains the configuration of it? Nope, since it all under the Httpd project :). You can start with: http://httpd.apache.org/docs/2.2/mod/mod_proxy.html, and then move on to http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html. The simplest configuration looks like: ProxyPass /myapp ajp://localhost:8009/myapp Ok, I understand what it is trying to do here. But I assume there is a connector that has to be loaded in Tomcat to enable listening for the ajp protocol on port 8009, no? Is there documentation about this anywhere? On the Tomcat side, there is no difference (really) between whether the web server is using mod_jk or mod_proxy_ajp. Both use AJP for the link, so you'd use the AJP connector. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
why use mod_jk?
After wasting time trying to configure mod_jk, I thought I'd just wipe my mind free and just play dumb for a moment. If Apache can proxy requests using mod_proxy, what is the benefit of using mod_jk as an integration technique between httpd and tomcat, if integration is *not* in-process, which I understand is not recommended for Tomcat 5.5? Brad - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
