The scheduler does not appear to be running. Last heartbeat was received .

The DAGs list may not update, and new tasks will not be scheduled.

DAG: Custom-EMR-cluster_v001 ROOT: create_cluster_n_add_steps

schedule: None

Base date: Number of runs:
no_status
queued
running
success
failed
up_for_retry
up_for_reschedule
upstream_failed
skipped
scheduled
PythonOperator