# Unicorn error when restart

**URL:** <https://www.ruby-forum.com/t/unicorn-error-when-restart/230662>\
**Category:** Deployment\
**Created:** [June 28, 2014, 3:12pm UTC](https://www.ruby-forum.com/t/unicorn-error-when-restart/230662 "2014-06-28T15:12:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [June 28, 2014, 3:12pm UTC](https://www.ruby-forum.com/t/unicorn-error-when-restart/230662/1 "2014-06-28T15:12:42Z")

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When I restart unicorn it throws error stating  
Master failed to start please see stderr.log for more details  
How can I fix this error

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**Author:** ![sheyam\_s](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f4b2a3/32.png) [@sheyam\_s](https://www.ruby-forum.com/u/sheyam_s)\
**Post date:** [July 18, 2014, 2:36pm UTC](https://www.ruby-forum.com/t/unicorn-error-when-restart/230662/2 "2014-07-18T14:36:49Z")

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Please share stderr.log 🙂