When jobs run on spot VMs, there is a small risk of interruption. An interruption occurs when a spot VM becomes unavailable in the middle of execution, usually due to increased cloud demand. In that case, the job is marked as failed due to an unresponsive VM. What happens next depends on the job's "restart policy." By default, the Platform retries any job that fails due to unresponsive VMs, up to two times. When a job is retried, a new VM is allocated depending on priority. Low priority jobs are retried again on spot, whereas normal priority jobs are retried on spot for 15 minutes and then switched to on-demand.