As a web application developer, it is not obvious to encounter this error on a daily basis. When you encounter this error, most of the application developers or system admins, jump in the app log to find this error. Mostly, you won't find this error in the application log, GO TO the web server error log and you will find the issue that may be app-related or environment-related.
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For example, one of the issues may be redeclaring application controller action twice or more…
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