The Flink UI can show the exceptions so that troubleshooting is easy. To access the UI, first connect to the Jenkins VM using SSH port forwarding
ssh -L 8000:localhost:8000 nsdl-jenkins38-dev
Then use kubectl port forwarding to map to the above port. Eg
kubectl port-forward services/ingest-router-jobmanager-webui 8000:80 -n flink-dev
kubectl port-forward services/hawkeyesuperset-service 8088:80 -n dev