We are having a master and coordinator setup of Dremio 3.3.1 version. When coordinator is shutdown and if there are any jobs being handled by that coordinator, they all are going to hung state. None of jobs are getting failed and always shows Running state.
When you say master and coordinator setup, do you have a master-cordinator and a non-master coordinator node? If yes then that is only supported in Dremio 4.7 and above
This is an old bug we had that was fixed in a 4.x release some time ago where jobs were nto marked as failed if the coordinator shut down.