Which version of Deadline are you using?
Corona is officially supported by Deadline now so it should properly update it's status and thus prevent a task timeout to happen. Normally, the render engine communicates with deadline and sends messages to the repository about it's current progress - if this doesn't happen, like with FumeFx simulations (where you have to write a script yourself to do the updating) , Deadline will hit the time out at some point and re-queue the task.
I haven't tested it myself recently and I don't know if it's implemented this way but it should be. You may also have a look at the Thinkbox deadline forum.