# Juggernaut Error

**URL:** <https://www.ruby-forum.com/t/juggernaut-error/214417>\
**Category:** Deployment\
**Created:** [December 1, 2011, 4:42pm UTC](https://www.ruby-forum.com/t/juggernaut-error/214417 "2011-12-01T16:42:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [December 1, 2011, 4:42pm UTC](https://www.ruby-forum.com/t/juggernaut-error/214417/1 "2011-12-01T16:42:09Z")

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I am using rails3 and juggernaut server but i run the code that shows  
the error is Undefined “session id”.  
Please tell me the solution for this problem.