RE: [KCFusion] Unexpected Loss of Session Variables
If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
I'm not sure if this will help you, but here's the way I use it. CFAPPLICATION NAME="xl"CLIENTMANAGEMENT="Yes"SESSIONMANAGEMENT="Yes"SESSIONTIMEOUT="#CREATETIMESPAN(0,0,20, 0)#" I also lock my variables with like this: cflock name="Session" type="Exclusive" timeout="30" throwontimeout="Yes" In each template I use this statement: cflock name="Session" type="ReadOnly" timeout="30" throwontimeout="Yes"CFPARAM Name="session."/cflock -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:53 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables cfapplication name="STFM-Presentation-Submission" sessionmanagement="Yes" Session variables are only lost by approximately 20% of users. Remaining users experience no problem. Thanks for the assistance. Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:42PM What does your cfapplication statement look like? -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
This may be completely useless but... I do not remember howour web administratorresolved this, but in my last job we had this problem. It stemmed from users that use the same proxy server in an intranet environment. A new user would reset the session variables of any user previously logged in. This would cause sessions to timeout after very short periods of time. So, my point is...if your users are utilizing the same proxy server, check those settings. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
What does your cfapplication statement look like? -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
cfapplication name="STFM-Presentation-Submission" sessionmanagement="Yes" Session variables are only lost by approximately 20% of users. Remaining users experience no problem. Thanks for the assistance. Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:42PM What does your cfapplication statement look like? -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
Thanks for the infor I have some questions: 1. On each template are you loading all your session variables into local variables here: cflock name="Session" type="ReadOnly" timeout="30" throwontimeout="Yes"CFPARAM Name="session."/cflock 2. What effect does the attribute throwontimeout="Yes" have? Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 02:23PM I'm not sure if this will help you, but here's the way I use it. CFAPPLICATION NAME="xl"CLIENTMANAGEMENT="Yes"SESSIONMANAGEMENT="Yes"SESSIONTIMEOUT="#CREATETIMESPAN(0,0,20, 0)#" I also lock my variables with like this: cflock name="Session" type="Exclusive" timeout="30" throwontimeout="Yes" In each template I use this statement: cflock name="Session" type="ReadOnly" timeout="30" throwontimeout="Yes"CFPARAM Name="session."/cflock -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:53 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables cfapplication name="STFM-Presentation-Submission" sessionmanagement="Yes" Session variables are only lost by approximately 20% of users. Remaining users experience no problem. Thanks for the assistance. Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:42PM What does your cfapplication statement look like? -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You, Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED]
RE: [KCFusion] Unexpected Loss of Session Variables
No, I'm not loading it into a local variable, just checking to make sure it exist. Throwontimeout produces an error that is trapped and deliver to the browser alerting the user. If you have a lot of activity on your web app and you do not lock your session variables it can produce errors that seem to be time outs, but in reality the session variables get crunched by another session. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 2:50 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the infor I have some questions: 1. On each template are you loading all your session variables into local variables here: cflock name="Session" type="ReadOnly" timeout="30" throwontimeout="Yes"CFPARAM Name="session."/cflock 2. What effect does the attribute throwontimeout="Yes" have? Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 02:23PM I'm not sure if this will help you, but here's the way I use it. CFAPPLICATION NAME="xl"CLIENTMANAGEMENT="Yes"SESSIONMANAGEMENT="Yes"SESSIONTIMEOUT="#CREATETIMESPAN(0,0,20, 0)#" I also lock my variables with like this: cflock name="Session" type="Exclusive" timeout="30" throwontimeout="Yes" In each template I use this statement: cflock name="Session" type="ReadOnly" timeout="30" throwontimeout="Yes"CFPARAM Name="session."/cflock -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:53 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables cfapplication name="STFM-Presentation-Submission" sessionmanagement="Yes" Session variables are only lost by approximately 20% of users. Remaining users experience no problem. Thanks for the assistance. Bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:42PM What does your cfapplication statement look like? -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:36 PMTo: [EMAIL PROTECTED]Subject: RE: [KCFusion] Unexpected Loss of Session Variables Thanks for the quick reply. We are on a shared host. The hosting company has the timeout set to 20 minutes and we cannot adjust that. However, session variables are being lost before the 20 minute period (sometimes very quickly 1-2 minutes). bruce Bruce PhillipsSociety of Teachers of Family Medicine913-906-6000 ext 5405[EMAIL PROTECTED] [EMAIL PROTECTED] 06/17/03 01:25PM If you're using IIS on your server, take a look at the timeout on it. That has bit me before. Also make sure the time out on the cf server is what you want it to be. -Original Message-From: Bruce Phillips [mailto:[EMAIL PROTECTED]Sent: Tuesday, June 17, 2003 1:11 PMTo: [EMAIL PROTECTED]Subject: [KCFusion] Unexpected Loss of Session Variables Hello. I'm the new webmaster for stfm.org. Our website uses ColdFusion5.0 as its web programming language. I'm originally a Java Programmer(JavaServerPages), so I've had to learn CFML quickly (thanks to BenForte's books).Our web site is hosted on a shared server (crystaltech.com).We are experiencing unexpected loss of some or all session variablesfor about 20% of our users. The session variables are lost well beforethe 20 minute timeout limit.We use session variables to maintain user input across approximately3-4 data entry pages (page numbers vary based upon specific category). Our session variables are set and read inside of cflock tags perColdFusion best practices.The problem appears to worsen when we have more users on our site, butthe number of users is not that significant (less than 20-30 per hour). This is a shared server, but I don't know the overall load on theserver.I've reseached your listserver but did not find any material on thissubject. From my research on Macromedia's forum, the loss of session variablesappears to be a problem with ColdFusion 5. We are considering changing our host plan to ColdFusion MX, though some of our applications will need recoding since they use attributes no longer supported in ColdFusion MX. I'd certainly appreciate any advice from more experienced ColdFusion developers who may have encountered and solved this problem. Thank You,
RE: [KCFusion] Unexpected Loss of Session Variables
Title: Message While this is a far off chance, see if you can get a hold of the webserver and/or CF logs. With a shared server, you may be experiencing problems caused by other people's code, more specifically their CF. If they do something that causes the CF server to hang and restart, you will loose your session variables. With a shared solution, particularly with heavy loading and unlocked application/session variable access, the application server may be restarting. The logs should show evidence of coldfusion restarting. There is a setting in the CF administrator that allows you to set CF to restart after a set number of errors of some kind. I believe the default is 10 errors, though what kind of errors I do not recall. IF this is the case, the only way around it is with proper server sandbox configuration (if even that) or a dedicated environment (since you can't rely on everyone to write good code). This may not be the problem however. Also, look into using Client variables versus session variables. They are stored in a database versus Ram and are less susceptible to corruption and loss. I am not sure if you will loose your session anyway if the server restarts CF, but it might help. You can also look into dropping a short term cookie on the client's web browser to store a quasi session token. You can probably get around the cookie by using a unique (but not risky row identifier) value from the database and appending it to each page request/form submission. By using it, and forcibly storing the form variables immediately after each page submission, you can probably get away from using session variables. I wouldn't recommend this normally, but it may be a useful workaround. Ryan
