# Mongrel hangs when idle **URL:** \ **Category:** Rails\ **Created:** [November 23, 2009, 1:01pm UTC](https://www.ruby-forum.com/t/mongrel-hangs-when-idle/179359 "2009-11-23T13:01:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![murraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f6c823/32.png) [@murraj](https://www.ruby-forum.com/u/murraj)\ **Post date:** [November 23, 2009, 1:01pm UTC](https://www.ruby-forum.com/t/mongrel-hangs-when-idle/179359/1 "2009-11-23T13:01:49Z")
Hello All, This issue has been raised by so many people in this forum and in the web before. But i am not sure, whether all of those got fixed the issue. My application is running in 1)rails 2.2.2 2)ruby 1.8.6 (2008-08-11 patchlevel 287) [x86\_64-linux] 3)MySQL 5.1.30-ndb-6.3.20-cluster-gpl MySQL Cluster Server (GPL) 4)Apache/2.2.3 + mongrel\_cluster(1.0.5) The mongrel is hanged when it is idle for some time. I don’t get any errors in the logs. When i googled about this, i found the Mongrel FAQ page - [http://mongrel.rubyforge.org/wiki/FAQ](http://mongrel.rubyforge.org/wiki/FAQ) which says to set ActiveRecord::Base.verification\_timeout = 14400. when i added this in environment.rb i got warning as below: DEPRECATION WARNING: ActiveRecord::Base.verification\_timeout= has been deprecated and no longer has any effect. So the above solution failed. I tried so many trials like increasing MySQL interactive\_timeout to a high value, updating the mysql gem etc… But no luck. After so many trials and search i found that this issue rises only in production mode. That is when config.cache\_classes is set to true In my stage environment also i am having the same configuration as my production(rails, ruby, mysql, apache and mongrel\_cluster). That is config.cache\_classes is set to true. So, when config.cache\_classes = true, the mongrel hangs up after a long idle time. When its is set to false, everything is O.K I doubt whether this(config.cache\_classes = true) is the cause of the issue. I am not sure whether DB connections are also cached if config.cache\_classes is set to true. Please help me in solving the issue. Any of your suggestions will be very helpful to me. Thanks in advance Murugaraj B. ---
**Author:** ![murraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f6c823/32.png) [@murraj](https://www.ruby-forum.com/u/murraj)\ **Post date:** [November 24, 2009, 5:48am UTC](https://www.ruby-forum.com/t/mongrel-hangs-when-idle/179359/2 "2009-11-24T05:48:52Z")
Hi Muruga R. ``` Though I am not sure I have once read somewhere that you can ``` setup a cron job to access say your home page every 5 or 10 minutes so to wakeup it on these regular intervels.But the above I read to avoid delay in loading first page after some time of idleness. But in your case it is hanging As an example crontab -e \*/5 \* \* \* \* curl -s http://www.your\_domain.com /dev/null ``` Please check right syntax for this ``` Sijo ---
**Author:** ![murraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f6c823/32.png) [@murraj](https://www.ruby-forum.com/u/murraj)\ **Post date:** [November 24, 2009, 5:59am UTC](https://www.ruby-forum.com/t/mongrel-hangs-when-idle/179359/3 "2009-11-24T05:59:24Z")
Sijo k g wrote: > Hi Muruga R. > > ``` > Though I am not sure I have once read somewhere that you can > > ``` > > setup a cron job to access say your home page every 5 or 10 minutes so > to wakeup it on these regular intervels.But the above I read to avoid > delay in loading first page after some time of idleness. But in your > case it is hanging > As an example crontab -e > > \*/5 \* \* \* \* curl -s http://www.your\_domain.com /dev/null > > ``` > Please check right syntax for this > > ``` > > Sijo Hello sijo, Thank you for your suggestion. I am already using the cronjob you mentioned. Anyway i need a permanent solution for this. Thank you once again.