While playing Minecraft suddenly the power went off. After 4 hours when it came back I turned on the pc to resume playing, however the chunk where I was last time had disappeared. I had respawned about 10 blocks away form the missing chunk. I tried pressing F3 + A, saving and quitting, and reloading the game.
It seems that when the power went off the computer was busy writing to that particular chunk, and that writing task remained incomplete.
I haven't tried to go inside that and seeing whether I fall or not (I can't risk my armor or experience). That chunk was not important to me, it just bothers me while I am hunting mobs.
What are the possible methods to get back the chunk?