# Time slowly out of sync? **URL:** \ **Category:** Ruby\ **Created:** [June 5, 2009, 10:26am UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562 "2009-06-05T10:26:50Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dawillis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@dawillis](https://www.ruby-forum.com/u/dawillis)\ **Post date:** [June 5, 2009, 10:26am UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562/1 "2009-06-05T10:26:50Z")
Hi all! This is my first post to this mailinglist, so be gentle 🙂 I hope you can help me with this very strange issue I’m having… I have an application in JRuby on GlassFish deployed on 2 servers. One is production, the other is fail-over. We had an power outage a few days ago, and now I’m having a strange issue on the production server. It seems that the application (NOT the server) is slowly losing track of time… I’ve investigated the log file, and here are some results, consider the times: [#|2009-06-04T15:00:00.446+0200|INFO|sun-appserver9.1| javax.enterprise.system.container.web| \_ThreadID=19;\_ThreadName=httpSSLWorkerThread-80-0;|PWC1412: WebModule [] ServletContext.log(): Processing PdfsController#index (for 172.50.0.5 at 2009-06-04 14:56:10) [GET] Session ID: 1306c85395433b5445b1f93211ce952e Parameters: {“controller”=\>“pdfs”, “action”=\>“index”} Redirected to [http://sano01/session/new](http://sano01/session/new) Filter chain halted as [:check\_roles] rendered\_or\_redirected. Completed in 0.00150 (666 reqs/sec) | DB: 0.00235 (156%) | 302 Found | #] This gets worse: [#|2009-06-04T16:52:03.366+0200|INFO|sun-appserver9.1| javax.enterprise.system.container.web| \_ThreadID=19;\_ThreadName=httpSSLWorkerThread-80-0;|PWC1412: WebModule [] ServletContext.log(): Processing PdfsController#index (for 172.50.0.5 at 2009-06-04 16:27:07) [GET] Session ID: 144a9aeaad71dfd6c1241a70cffc5bfd Parameters: {“controller”=\>“pdfs”, “action”=\>“index”} Redirected to [http://sano01/session/new](http://sano01/session/new) Filter chain halted as [:check\_roles] rendered\_or\_redirected. Completed in 0.00137 (731 reqs/sec) | DB: 0.00095 (69%) | 302 Found|#] Really worse: [#|2009-06-05T02:53:25.696+0200 |INFO|sun-appserver9.1|javax.enterprise.system.container.web| \_ThreadID=19;\_ThreadName=httpSSLWorkerThread-80-0;|PWC1412: WebModule [] ServletContext.log(): Processing SessionsController#new (for 172.16.0.14 at 2009-06-05 00:35:14) [GET] Session ID: 94ce2b52338cda7c03c2a08de8629ff1 Parameters: {“controller”=\>“sessions”, “action”=\>“new”} Rendering template within layouts/application Rendering sessions/new Completed in 0.01545 (64 reqs/sec) | Rendering: 0.01272 (82%) | DB: 0.00319 (20%) | 200 OK|#] [#|2009-06-05T08:56:42.932+0200 |INFO|sun-appserver9.1| javax.enterprise.system.container.web| \_ThreadID=20;\_ThreadName=httpSSLWorkerThread-80-2;|PWC1412: WebModule [] ServletContext.log(): Processing SessionsController#new (for 172.50.0.5 at 2009-06-05 05:30:05) [GET] Session ID: a0a85a83bede7cf072acf6a16fa6fc0c Parameters: {“controller”=\>“sessions”, “action”=\>“new”} Rendering template within layouts/application Rendering sessions/new Completed in 0.01425 (70 reqs/sec) | Rendering: 0.01193 (83%) | DB: 0.00374 (26%) | 200 OK|#] As you can see, the time goes way off!!! How can this be happening? Is there a way I can sync time in JRuby (GalssFish doen’t seem to be the issue) with the server time? Anyone with some help/anwsers/hints? With kind regards, David W. – David (davidakachaos) blog: [http://www.davidakachaos.nl](http://www.davidakachaos.nl) Hyves: [http://davidakachaos.hyves.nl](http://davidakachaos.hyves.nl) ---
**Author:** ![dawillis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@dawillis](https://www.ruby-forum.com/u/dawillis)\ **Post date:** [June 6, 2009, 2:14am UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562/2 "2009-06-06T02:14:47Z")
Is this actually 1.1.3? If so, that’s probably part of the problem 🙂 1.1.3 is almost a year old, and used some timekeeping logic that has since been removed because of drift and because of suspend/sleep throwing it way off. I’d strongly recommend updating to 1.2 or higher. - Charlie ---
**Author:** ![dawillis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@dawillis](https://www.ruby-forum.com/u/dawillis)\ **Post date:** [June 6, 2009, 9:49pm UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562/3 "2009-06-06T21:49:50Z")
Hi, Thanks, I will look into that. I just got handed this application to maintain, so I’ll if I can upgrade savely 🙂 2009/6/6 Charles Oliver N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > > Hi all! > > I’ve investigated the log file, and here are some results, consider > > Parameters: {“controller”=\>“pdfs”, “action”=\>“index”} > > [] ServletContext.log(): > > > > Rendering sessions/new > > Session ID: a0a85a83bede7cf072acf6a16fa6fc0c > > > > Anyone with some help/anwsers/hints? > > > > With kind regards, > > > > David W. – David (davidakachaos) blog: [http://www.davidakachaos.nl](http://www.davidakachaos.nl) Hyves: [http://davidakachaos.hyves.nl](http://davidakachaos.hyves.nl) msn: removed\_email\_address@domain.invalid I never said it was your fault, I said I was going to blame you!!! Sent from Utrecht, UT, Netherlands George Bernard Shaw[http://www.brainyquote.com/quotes/authors/g/george\_bernard\_shaw.html](http://www.brainyquote.com/quotes/authors/g/george_bernard_shaw.html) - “A government that robs Peter to pay Paul can always depend on the support of Paul.” ---
**Author:** ![dawillis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@dawillis](https://www.ruby-forum.com/u/dawillis)\ **Post date:** [June 9, 2009, 2:06am UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562/4 "2009-06-09T02:06:32Z")
Robert K. wrote: > > How can this be happening? Is there a way I can sync time in JRuby > > Knowing that the HP JVM is written by Sun and OEM’ed by HP I would not > totally exclude the possibility of a similar phenomenon on Solaris > although we did not observe this yet. Wow, very interesting. I’d never seen or heard of that issue before. Thanks for the pointer! - Charlie ---
**Author:** ![dawillis](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@dawillis](https://www.ruby-forum.com/u/dawillis)\ **Post date:** [June 8, 2009, 11:57am UTC](https://www.ruby-forum.com/t/time-slowly-out-of-sync/169562/5 "2009-06-08T11:57:54Z")
2009/6/5 David W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > I hope you can help me with this very strange issue I’m having… > I have an application in JRuby on GlassFish deployed on 2 servers. One > is production, the other is fail-over. We had an power outage a few > days ago, and now I’m having a strange issue on the production server. > It seems that the application (NOT the server) is slowly losing track > of time… > As you can see, the time goes way off!!! > > How can this be happening? Is there a way I can sync time in JRuby > (GalssFish doen’t seem to be the issue) with the server time? > > Anyone with some help/anwsers/hints? We had a similar issue just recently with a JVM run on HP Itanium. It turned out that it was the JVM not using a system call to get at the time but did some internal sampling. This was remedied by using JVM option “-XX:+UseGetTimeOfDay”: [http://www.google.com/search?q="-XX%3A%2BUseGetTimeOfDay"](http://www.google.com/search?q=%22-XX%3A%2BUseGetTimeOfDay%22) Knowing that the HP JVM is written by Sun and OEM’ed by HP I would not totally exclude the possibility of a similar phenomenon on Solaris although we did not observe this yet. Kind regards robert