I wanna know what has happened with me.

So right now i was playing in my friends minecraft server hosted in exaraton and no one has access to console only 2 staff have that will not do this surely So what happened is i was doing fishing and suddenly my hunger bar from fill to in milliseconds become empty and in a blink of eye i got killed pop up appeared that I got killed and in chat also it appeared So i want to know that what was thing happened? and did someone attacked the server and gain access to console and did /kill command and after that I return to same location to collect my stuff there was only 10% left and other 90% was disappeared.