aws hosting error with ror

I have hosted a ror app in aws ec2. Development env works fine but when i start production mode it says - "We're sorry, but something went wrong.We've been notified about this issue and we'll take a look at it shortly."

I chechked production.log production.log

[2015-07-02T16:37:21.257777 #12834]  INFO -- : Migrating to <Table Name> (20150608154559)

Like this all table name are shown with a migrating msg.

Is this is an error? How to resolve this ?