preempted job w/ no caching set to failed state

Hi, I received the following for a job:

2018-08-24 15:28:18,726 INFO - PipelinesApiAsyncBackendJobExecutionActor [UUID(43bd5380)ctat_fusion_wf.CTAT_FUSION_TASK_FQPAIRTARGZ:NA:1]: Status change from Initializing to Preempted

and it was given a failure state.

I don't have any preemption settings in my workflow, and I set the job caching turned off (because I have everything in one task w/ all or nothing execution pattern).

Is preemption -> failure state expected here, and is there a more optimal way for me to do this while aiming to keep costs down?