RE: how to show "System Unavailable" page when Tomcat is down
Hi, My take on it would be that tomcat restarts are fast, and so no such page is needed. If yours takes a long time to restart, you probably have extra applications or processing taking place on shutdown/startup. If you really do need to do a bunch of stuff on startup AND you must have this system unavailable page display during this time, follow Tim's Apache approach... Yoav Shapira Millennium Research Informatics >-Original Message- >From: Tim Funk [mailto:[EMAIL PROTECTED] >Sent: Tuesday, June 15, 2004 6:58 AM >To: Tomcat Users List >Subject: Re: how to show "System Unavailable" page when Tomcat is down > >Type 3 drivers are better than type 1. (But that depends on the >implementation) The JDBC-ODBC driver was *never* meant for production >usage. > >I know little about IIS - but I would hope there is a button that can be >clicked, or a tab in some property screen that would let you do the >equivalent of sending all traffic to a single page. > >-Tim > >Stephen Charles Huey wrote: > >> If we currently have Tomcat 4 running on Win 2000, would there be >> significant overhead to run Apache as well just so that we can put up an >> error page when Tomcat has to be restarted? >> >> Some of you mentioned I should try using a type 4 driver, and I Googled >> around to brush up on different types, and I realize we probably use a >> type 1 driver since it's a JDBC to ODBC bridge. The database we're >> using is Raining Data's D3 database (a multivalue db), and I searched >> around and only found a couple of JDBC drivers that look like they might >> work, but they're type 3 drivers, and I'm wondering what (if any) >> additional layer I need to make a type 3 driver talk to the D3 database, >> or if I can simply drop it into my J2EE/Tomcat. These are the drivers I >> found: >> >> FusionWare, halfway down the page: >> http://www.sqlsummit.com/JDBCVend.htm >> >> Liberty JDBC: >> http://www.multivalue.com/LibJDBC.html >> >> >> ----- Original message - >> From: "David Smith" <[EMAIL PROTECTED]> >> To: "Tomcat Users List" <[EMAIL PROTECTED]> >> Date: Mon, 14 Jun 2004 20:10:11 -0400 >> Subject: Re: how to show "System Unavailable" page when Tomcat is down >> >> To directly answer your question, essentially something has to be >> listening on port 80 even when Tomcat is down. The only way I know of >> to do that is to put up some kind of proxy server with a error page. I >> know Apache can be used that way, Squid looks like it could as well. >> >> On the other hand, you could also replace your ODBC driver with a >> genuine type 4 driver and make your site much more reliable. I think >> someone else already suggested that and I whole-heartedly agree. >> >> --David >> >> Stephen Huey wrote: >> >> >>>Though I'm capable of adding to the JSPs and servlets on an existing >>>site, I'm no web server guru, so I'm having a hard time with this >>>problem. Our database vendor's ODBC driver has issues, so occasionally >>>we have to restart Tomcat (and maybe the driver) to get the website >>>running again, and since this is used by thousands of people every day, >>>they can get pretty annoyed when all they see in their browser is "Page >>>cannot be displayed" (and this can go on for anywhere from 5-15 >>>minutes). >>>We need a way to show some redirect requests for the website to some >>>static HTML page when Tomcat is down. Since Tomcat is running our >>>website, I'm really not sure of how to provide a solution for that (we >>>don't have multiple application servers--just one web server and one >>>database server). Any thoughts would be greatly appreciated! >>> >>>Thanks, >>>Stephen >>> >>>- >>>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] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to show "System Unavailable" page when Tomcat is down
Type 3 drivers are better than type 1. (But that depends on the implementation) The JDBC-ODBC driver was *never* meant for production usage. I know little about IIS - but I would hope there is a button that can be clicked, or a tab in some property screen that would let you do the equivalent of sending all traffic to a single page. -Tim Stephen Charles Huey wrote: If we currently have Tomcat 4 running on Win 2000, would there be significant overhead to run Apache as well just so that we can put up an error page when Tomcat has to be restarted? Some of you mentioned I should try using a type 4 driver, and I Googled around to brush up on different types, and I realize we probably use a type 1 driver since it's a JDBC to ODBC bridge. The database we're using is Raining Data's D3 database (a multivalue db), and I searched around and only found a couple of JDBC drivers that look like they might work, but they're type 3 drivers, and I'm wondering what (if any) additional layer I need to make a type 3 driver talk to the D3 database, or if I can simply drop it into my J2EE/Tomcat. These are the drivers I found: FusionWare, halfway down the page: http://www.sqlsummit.com/JDBCVend.htm Liberty JDBC: http://www.multivalue.com/LibJDBC.html - Original message - From: "David Smith" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Date: Mon, 14 Jun 2004 20:10:11 -0400 Subject: Re: how to show "System Unavailable" page when Tomcat is down To directly answer your question, essentially something has to be listening on port 80 even when Tomcat is down. The only way I know of to do that is to put up some kind of proxy server with a error page. I know Apache can be used that way, Squid looks like it could as well. On the other hand, you could also replace your ODBC driver with a genuine type 4 driver and make your site much more reliable. I think someone else already suggested that and I whole-heartedly agree. --David Stephen Huey wrote: Though I'm capable of adding to the JSPs and servlets on an existing site, I'm no web server guru, so I'm having a hard time with this problem. Our database vendor's ODBC driver has issues, so occasionally we have to restart Tomcat (and maybe the driver) to get the website running again, and since this is used by thousands of people every day, they can get pretty annoyed when all they see in their browser is "Page cannot be displayed" (and this can go on for anywhere from 5-15 minutes). We need a way to show some redirect requests for the website to some static HTML page when Tomcat is down. Since Tomcat is running our website, I'm really not sure of how to provide a solution for that (we don't have multiple application servers--just one web server and one database server). Any thoughts would be greatly appreciated! Thanks, Stephen - 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: how to show "System Unavailable" page when Tomcat is down
If we currently have Tomcat 4 running on Win 2000, would there be significant overhead to run Apache as well just so that we can put up an error page when Tomcat has to be restarted? Some of you mentioned I should try using a type 4 driver, and I Googled around to brush up on different types, and I realize we probably use a type 1 driver since it's a JDBC to ODBC bridge. The database we're using is Raining Data's D3 database (a multivalue db), and I searched around and only found a couple of JDBC drivers that look like they might work, but they're type 3 drivers, and I'm wondering what (if any) additional layer I need to make a type 3 driver talk to the D3 database, or if I can simply drop it into my J2EE/Tomcat. These are the drivers I found: FusionWare, halfway down the page: http://www.sqlsummit.com/JDBCVend.htm Liberty JDBC: http://www.multivalue.com/LibJDBC.html - Original message - From: "David Smith" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Date: Mon, 14 Jun 2004 20:10:11 -0400 Subject: Re: how to show "System Unavailable" page when Tomcat is down To directly answer your question, essentially something has to be listening on port 80 even when Tomcat is down. The only way I know of to do that is to put up some kind of proxy server with a error page. I know Apache can be used that way, Squid looks like it could as well. On the other hand, you could also replace your ODBC driver with a genuine type 4 driver and make your site much more reliable. I think someone else already suggested that and I whole-heartedly agree. --David Stephen Huey wrote: > Though I'm capable of adding to the JSPs and servlets on an existing > site, I'm no web server guru, so I'm having a hard time with this > problem. Our database vendor's ODBC driver has issues, so occasionally > we have to restart Tomcat (and maybe the driver) to get the website > running again, and since this is used by thousands of people every day, > they can get pretty annoyed when all they see in their browser is "Page > cannot be displayed" (and this can go on for anywhere from 5-15 > minutes). > We need a way to show some redirect requests for the website to some > static HTML page when Tomcat is down. Since Tomcat is running our > website, I'm really not sure of how to provide a solution for that (we > don't have multiple application servers--just one web server and one > database server). Any thoughts would be greatly appreciated! > > Thanks, > Stephen > > - > 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: how to show "System Unavailable" page when Tomcat is down
To directly answer your question, essentially something has to be listening on port 80 even when Tomcat is down. The only way I know of to do that is to put up some kind of proxy server with a error page. I know Apache can be used that way, Squid looks like it could as well. On the other hand, you could also replace your ODBC driver with a genuine type 4 driver and make your site much more reliable. I think someone else already suggested that and I whole-heartedly agree. --David Stephen Huey wrote: Though I'm capable of adding to the JSPs and servlets on an existing site, I'm no web server guru, so I'm having a hard time with this problem. Our database vendor's ODBC driver has issues, so occasionally we have to restart Tomcat (and maybe the driver) to get the website running again, and since this is used by thousands of people every day, they can get pretty annoyed when all they see in their browser is "Page cannot be displayed" (and this can go on for anywhere from 5-15 minutes). We need a way to show some redirect requests for the website to some static HTML page when Tomcat is down. Since Tomcat is running our website, I'm really not sure of how to provide a solution for that (we don't have multiple application servers--just one web server and one database server). Any thoughts would be greatly appreciated! Thanks, Stephen - 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: how to show "System Unavailable" page when Tomcat is down
We put apache in front of tomcat. When we have an outage like this, we use mod_rewrite to redirect everything to our custom error page. Don't use ODBC. Its not meant to be used with java. Use a type 4 driver. -Tim Stephen Huey wrote: Though I'm capable of adding to the JSPs and servlets on an existing site, I'm no web server guru, so I'm having a hard time with this problem. Our database vendor's ODBC driver has issues, so occasionally we have to restart Tomcat (and maybe the driver) to get the website running again, and since this is used by thousands of people every day, they can get pretty annoyed when all they see in their browser is "Page cannot be displayed" (and this can go on for anywhere from 5-15 minutes). We need a way to show some redirect requests for the website to some static HTML page when Tomcat is down. Since Tomcat is running our website, I'm really not sure of how to provide a solution for that (we don't have multiple application servers--just one web server and one database server). Any thoughts would be greatly appreciated! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: how to show "System Unavailable" page when Tomcat is down
Which database and ODBC are you using? Kind Regards Schalk Neethling Web Developer.Designer.Programmer.President Volume4.Development.Multimedia.Branding emotionalize.conceptualize.visualize.realize Tel: +27125468436 Fax: +27125468436 email:[EMAIL PROTECTED] web: www.volume4.co.za This message contains information that is considered to be sensitive or confidential and may not be forwarded or disclosed to any other party without the permission of the sender. If you received this message in error, please notify me immediately so that I can correct and delete the original email. Thank you. :: -Original Message- :: From: Stephen Huey [mailto:[EMAIL PROTECTED] :: Sent: Tuesday, June 15, 2004 12:17 AM :: To: [EMAIL PROTECTED] :: Subject: how to show "System Unavailable" page when Tomcat is down :: :: Though I'm capable of adding to the JSPs and servlets on an existing :: site, I'm no web server guru, so I'm having a hard time with this :: problem. Our database vendor's ODBC driver has issues, so occasionally :: we have to restart Tomcat (and maybe the driver) to get the website :: running again, and since this is used by thousands of people every day, :: they can get pretty annoyed when all they see in their browser is "Page :: cannot be displayed" (and this can go on for anywhere from 5-15 :: minutes). :: :: We need a way to show some redirect requests for the website to some :: static HTML page when Tomcat is down. Since Tomcat is running our :: website, I'm really not sure of how to provide a solution for that (we :: don't have multiple application servers--just one web server and one :: database server). Any thoughts would be greatly appreciated! :: :: Thanks, :: Stephen :: :: - :: 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]
