Suddenly when I run my app locally, I get double console output. Does anybody know what might have caused this? The problem exists both when running Thin and Unicorn
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Check if you have code like this in your application:
Rails sometimes makes duplicate records because of this also.
You may try doing:
rake assets:clean
Or maybe, commenting out this line in development.rb, might work:
config.active_support.deprecation = :log
As a last try, you may even try changing the folder of the application and then start the server to see the result.
Cheers!