This error occurs when a job is configured to run more parallel workers than the cluster can accommodate, typically due to resource constraints or node availability limits.
The "Job parallelism exceeded" error indicates that the job's parallelism setting is higher than what the cluster can currently support.
kubectl get job <name> -o jsonpath='{.spec.parallelism}'
kubectl get pods -l job-name=<name> | wc -l
kubectl describe pod <pending-pod>
kubectl top nodes
For jobs with many tasks, use Job with parallelism instead of manual pod management.
kubectl patch job <name> -p '{"spec":{"parallelism":5}}'