Amazon + Django each 12 hours appears that [Errno 5] Input/output error

I recently setup and deploy an Amazon EC2 instance for deploy my django project.

I  was interacting with my application via browser when I get this error in the browser:

errno 5 input/output error django 

This error did reference to some function of my application, but in my console the server require restart and when I did this, the error was solved of a magic way ..

I've search this error and I found this ticket reported https://code.djangoproject.com/ticket/23284

This report is very similar to my error ...

Although I don't know if this error back inside 12 hours, I restart my server and this was solved and now all it's work O.K.

When one bug is declared as invalid in Django

What does it mean? 

There is some problem with EC2 infraestructure with Django (I don't think so) or the problem is more for my application side?

Thanks

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