Is it normal to have a lot of hot or stuck pixels on long exposure and higher ISO?

[erotavlas]

I noticed a lot of hot and stuck pixels in my long exposure images recently. I was doing some landscape astrophotography and the ones that stand out are the red and blue ones. They are very bright and noticeable. I forgot to enable high ISO noise reduction (i.e. dark frame subtraction) at the time.

Is this normal for all cameras? Do I just make sure I do the dark frame subtractions and not worry about it? Or is it a sign that my sensor is getting old, or needs servicing?

Here is a link to the sample image with bad pixels. Lens cap on, camera at room temperature.

30sec at 3200 ISO - Sony NEX 5N

 

[Derrel]

Well, that was a long exposure, 30 seconds, AND it was made at 3,200 ISO...it is not as bad as I was expecting it might be.