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Editorial Team
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Asked: 2026-06-12T19:41:45+00:00

This is driving me nuts. There is no error in development environment. There was

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This is driving me nuts. There is no error in development environment. There was no error in production environment when I deployed to Amazon EC2.

However, on Heroku, it is giving me a 500 error when accessing a particular page. There is no other message than 500 error message. 

2012-10-09T06:50:02+00:00 app[web.1]: Completed 500 Internal Server Error in 72ms (Views: 11.5ms | ActiveRecord: 44.2ms)

That’s all I have. No other error message. I even set the logging level to “DEBUG”.

What can I do to find out what’s causing the 500 error on Heroku?

I appreciate your help.

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1 Answer

  1. Editorial Team

    It turned out to be nothing to do with sass. I had to catch 500 error and display stack trace to figure out exactly what was causing the error and fix it.

    In the helper function, I had 

    rand(1..size)

    and that was causing the error on Heroku, but not on development environment nor on EC2. I had to modify it to 

    rand(size)

    and that fixed it.

    After printing stack trace, it was easy to pinpoint what was causing the error.

    I wrote a blog post about catching 400 and 500 errors so that you can do more interesting things.

    http://blog.yangtheman.com/2012/10/11/user-friendly-500-and-404-pages-on-rails-3/

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