Anyone else having an issue with map/reduce in sandbox? Ran a script with logging, and it made it to the reduce phase (which says processing) but the reduce phase is not logging anything nor changing any of the records in the saved search (should be reducing). I've also inactivated the script to stop it, but nothing has happened in 30-40 minutes.

either NS is bugged out, or that reduce phase is just erroring and you won't hear about it until summary()

it happens with me once or twice few weeks back. It got stuck on get input stage.

Do you remember how long it took to escape?

you might consider a scheduled script instead. Execution of those seem to be more stable than MR

inactivating will not help to stop it. try updating the source code. it will retrieve the new code on each cycle